Furnaces

The ABF Afterburner Ashing Furnace is particularly suitable for ashing larger samples or materials such as biomass, which are likely to generate substantial amounts of smoke. 

The furnace comprises a large main combustion chamber equipped as standard with a two tier set of sample baskets. The exhaust from the main chamber is processed through a high temperature afterburner designed to further process fumes and smoke.

Standard features

• 800°C maximum operating temperature - ashing chamber
• 28 Litre chamber volume
• Afterburner rated for up to 40 g carbon per ashing load
• Two tier baskets with loading tray and handle
• 3216P1 programmable controller
• Independent control of afterburner temperature up to 950°C
• Silicon carbide shielded wire wound elements
• Supplied with 3-phase supply as standard

Options (specify these at time of order)

• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
• Optional floor stand

Technical details

Airflow in the ABF 8/28 Ashing Furnace

1. Air inlet – air is preheated before entering the chamber
2. Air inlet into afterburner to ensure complete combustion
3. Air inlet into plenum to cool the gases before entering the extraction fan
4. Chimney
5. Furnace chamber
6. Afterburner
7. Extraction fan
8. Two tier perforated basket system

Content may be subject to modifications or corrections

The CAF G5 is a furnace designed to test ash fusibility, and optionally, the increasingly popular determination of biomass or solid recovered fuels testing. 

The coal ash fusibility test furnace conforms to the Standards ISO 540:2008; ASTM D 1857 / D1857M – 04 (2010); DIN 51730:2007-09; DD CEN/TS 15370-1:2006 (biomass) and PD CEN/TR 15404:2010 (solid recovered fuels (SRF)). 

The CAF G5’s automatic and continuous recording of digital images allows laboratory technicians to carry out other tasks while the test is in progress, reviewing results later. The new CAF G5 greatly enhances the quality of the recorded images and test results increasing efficiency in laboratories. 

The maximum temperature of 1600 °C enables both biomass and coal testing. An optional work tube integrated lighting system is also available when testing low ‘initial deformation’ temperature of SRF or biomass samples.

Standard features

• Analysis software which can be used in fully automatic or manual modes
• Software zoom function to enable accurate post-test analysis of individual samples with improved resolution
• One configurable grid assigned to each test piece
• Temperature controller program set up within the software
• Space saving embedded computer with Windows 7 Embedded Professional software runs future proof firmware
• Default software settings and individual analysis form for coal ash, biomass and SRF
• An optional work tube integrated lighting system when testing low initial deformation temperature of biomass or SRF samples
• Lightweight insulation allows quick cooling permitting multiple tests to be completed during the day
• Automated digital image capture of samples. The frequency of images recorded is set by customer preference, from every 1 °C increment to every 20 °C. The maximum interval for auto analysis is 5°C.

Technical details

View inside

1. 1600 °C tube furnace with integral SiC elements
2. External link to embedded PC & software
3. Flow meters for oxidising, reducing gas flow (dependant on the requirements of the standards)
4. 79 mm inner diameter work tube allows more than 6 samples
5. Digital camera for fast and accurate image recording
6. Gas tight seal for efficient use of gases & safety of operator
7. Automatic temperature programmer with multiple PID control
8. Gas inlets for reducing, oxidising & purge gasses
9. Oxidising or reducing gas selection switch
10. Work tube integrated light for use when testing low ‘initial deformation’ temperature of biomass and SRF samples (optional)

Content may be subject to modifications or corrections

The AAF ashing furnace range is designed specifically to provide optimum ashing conditions to ensure complete combustion of the sample. 

For those laboratories where ashing is interspersed with other heat treatment work the ashing furnace AAF 12/18 & AAF 12/32 provide all of the advantages of the AAF design, but with a higher maximum operating temperature of 1200 °C.

Standard features

• 1100 °C & 1200 °C maximum operating temperatures
• Carbolite Gero 301 single ramp to setpoint & process timer
• Two tier rack system doubling the sample capacity
• With sample trays and loading handle allows for large number of samples
• Ideal for ashing foods, plastics, coal & other hydrocarbon materials
• Preheating of air before it enters the chamber
• Protection of the elements from carbon build-up or corrosive atmosphere, using silicon carbide tiles
• 2 sided heating

Options (specify these at time of order)

• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
• Over-temperature protection (recommended to protect valuable contents & for unattended operation)

The AAF-BAL thermogravimetric analysis (TGA) furnace incorporates an integral balance. It can be used for loss on ignition applications where weight change of the sample must be monitored during the heating process. 

The AAF-BAL ashing furnace is fitted with an integral balance and can be used for loss on ignition (LOI) applications. Weight change of the sample is monitored during the heating process and this is required, for example, in the determination of organic matter content in materials such as sediment, sludge, soil and waste. Inorganic materials such as cement, lime, calcinated bauxite and refractories can also be tested.

Standard features

• Carbolite Gero 301 single ramp to setpoint & process timer
• Protection of the elements from carbon build-up or corrosive atmosphere, using silicon carbide tiles
• 2 sided heating
• Balance runs independently of the furnace control system
• Software supplied with the balance could be used to monitor the balance reading via a computer
• Maximum capacity of balance is 3 kg with a resolution of 0.01 g (other capacities available)

Options (specify these at time of order)

• Advanced version: The balance is linked to a 3508P1 temperature controller and both temperature and weight can be logged against time using iTools software
• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• 8 kg balance with a resolution of 0.1 g

Content may be subject to modifications or corrections

Some analysis techniques may be affected by alumina or silica dust (Al₂O₃ at SiO₂) - the materials normally used to construct furnace chambers. To avoid this the GSM furnace chamber is constructed from a fused quartz material.

This design also offers superior containment of aggressive and corrosive vapours such as sulphuric, nitric and hydrochloric acids by keeping them away from the heating elements.

Additionally if an optional gas inlet is specified, the enclosed design minimises gas leakages from the chamber.

Standard features

• 1100°C maximum operating temperature
• Fused quartz furnace chamber, ideal for analyses where Al₂O₃ or SiO₂ could contaminate test results
• Chamber lining offers superior containment of corrosive & aggressive vapours such as H₂SO₄, HNO₃, HCl
• Moulded ceramic fibre door plug
• 4 sided heating (2 sides, roof, hearth)

Options (specify these at time of order)

• Gas Inlet for modified atmospheres (the fused quartz liner provides improved containment)
• Sample trays & racks
• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications

Content may be subject to modifications or corrections

The ashing furnaces LV 3/11 - LVT 15/11 are especially designed for ashing in the laboratory. A special air intake and exhaust system allows air exchange of more than 6 times per minute. Incoming air is preheated to ensure a good temperature uniformity.

• Tmax 1100 °C
• Heating from two sides
• Ceramic heating plates with integral heating element which is safeguarded against fumes and splashing, and easy to replace
• Air exchange of more than 6 times per minute
• Good temperature uniformity due to preheating of incoming air
• Insulation made of non-classified fiber material
• Housing made of sheets of textured stainless steel
• Dual shell housing for low external temperatures and stability
• Optional flap door (LV) which can be used as work platform or lift door (LVT) with hot surface facing away from the operator
• Solid state relays provide for low­noise operation
• Defined application within the constraints of the operating instructions
• NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

• Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
• Process control and documentation via VCD software package for monitoring, documentation and control

he ashing furnaces LV 3/11 - LVT 15/11 are especially designed for ashing in the laboratory. A special air intake and exhaust system allows air exchange of more than 6 times per minute. Incoming air is preheated to ensure a good temperature uniformity.

• Tmax 1100 °C
• Heating from two sides
• Ceramic heating plates with integral heating element which is safeguarded against fumes and splashing, and easy to replace
• Air exchange of more than 6 times per minute
• Good temperature uniformity due to preheating of incoming air
• Only fiber materials are used which are not classified as carcinogenic according to TRGS 905, class 1 or 2
• Housing made of sheets of textured stainless steel
• Dual shell housing for low external temperatures and stability
• Optional flap door (LV) which can be used as work platform or lift door (LVT) with hot surface facing away from the operator
• Solid state relays provide for low­noise operation
• Defined application within the constraints of the operating instructions
• NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

• Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
• Observation hole in the door
• Process control and documentation via VCD software package for monitoring, documentation and control

The ABA 7/35B is designed to measure the asphalt binder content of hot mix asphalt (HMA) using loss on ignition, in accordance with AASHTO T 308-10, ASTM D6307-10 & BSEN 12697-39:2012. 

The integral microprocessor controlled weighing and calculation system is configurable to allow variations to the standard asphalt binder test method. Test result reports are available in both printed and software format. The high temperature afterburner minimises the production of noxious waste fumes. The asphalt binder analyzer is supplied complete with 2 sets of sample baskets.

Standard features

• General
• Simple to navigate 5.7" touchscreen control with secure Supervisor & Operator settings
• Avoids the health, environmental & waste management issues & expense associated with the older solvent extraction methods
• Best in class afterburner technology reduces emissions
• Has the capacity for large sample sizes for more accurate results (maximum sample is 4.5 kg)
• Average test times from 20 mins for 6 mm aggregates, to 45 mins for 40 mm aggregates
• Software
• Automatic calculation of final sample weight & binder % result
• Adjustable aggregate and hot mix asphalt correction factors
• Multi-lingual interface: English, Spanish, French, Chinese, Italian & Russian language display. Other languages are available to order
• Easy naming, storage & recall of recipes that can be transferred between ABA 7/35B units
• Precise weight measurements displayed to 0.1 g resolution
• Hardware
• USB data output and permanent (dot-matrix) printed reports
• Fail safe door lock system
• Sample trays guided and loaded onto robust stainless steel balance pan extension within the chamber
• High thermal efficiency insulation material with robust refractory brick door surround
• Double skin case construction for cool outer case
• Woven glass fibre door seal with stainless steel wire reinforcement

Options (specify these at time of order)

• Floor stand
• Sample cooling stand
• Additional sample baskets
• Metal waste gas extraction pipe
• Touchscreen protection film
• Gloves
• Face shield
• Factory fitted thermocouple access port, if temperature calibration is to be carried out

Content may be subject to modifications or corrections

The chamber furnaces LH 15/12 - LF 120/14 have been trusted for many years as professional chamber furnaces for the laboratory. These furnaces are available with either a robust insulation of light refractory bricks (LH models) or with a combination insulation of refractory bricks in the corners and low heat storage, quickly cooling fiber material (LF models). With a wide variety of optional equipment, these chamber furnaces can be optimally adapted to your processes.

• Tmax 1200 °C, 1300 °C, or 1400 °C
• Dual shell housing with rear ventilation, provides for low shell temperatures
• High furnace chamber with five-sided heating for very good temperature uniformity
• Heating elements on support tubes ensure free heat radiation and a long service life
• Controller mounted on furnace door and removable for comfortable operation
• Protection of bottom heating and flat stacking surface provided by embedded SiC plate in the floor
• LH models: multi-layered insulation of light refractory bricks and special backup insulation
• LF models: high-quality fiber insulation with corner bricks for shorter heating and cooling times. Only fiber materials are used which are not classified as carcinogenic according to TRGS 905, class 1 or 2.
• Door with brick-on-brick seal, hand fitted
• Short heating times due to high installed power
• Self-supporting arch for high stability and greatest possible protection against dust
• Quick lock on door
• Motor driven exhaust air flap
• Freely adjustable air inlet integrated in furnace floor
• Base included
• Defined application within the constraints of the operating instructions
• NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

• Parallel swinging door, pivots away from operator, for opening when hot
• Lift door with electro-mechanic linear drive
• Separate wall-mounting or floor standing cabinet for switchgear
• Cooling fan for shorter cycle times
• Protective gas connection to purge with non-flammable protective or reaction gases
• Manual or automatic gas supply system
• Scale to measure weight reduction during annealing
• Process control and documentation via VCD software package or Nabertherm Control Center (NCC) for monitoring, documentation and control

These compact universal split tube furnaces use free radiating wire elements embedded within the insulation of the furnace body. The benefit of this design is its flexibility with the use of tube adapters the same furnace can be used with a variety of tube diameters. 

The single zone EST and 3-zone EZS split tube furnaces comprise a furnace body which is hinged and split into two halves along its length. This makes exchange of work tubes easier and also enables the furnace to be used with reactors or work tubes where end flanges would make insertion into a non-split furnace difficult. 

The 3-zone EZS furnaces provide excellent uniformity resulting from division of the heated length into 3 zones with its own controller and thermocouple. This range of tube furnaces does not include an integral work tube which must be selected as an additional item. The work tube length is dependent on the application, for example, for use with modified atmosphere or vacuum.

The use of a separate work tube has the advantage of protecting the heating elements from damage or contamination.

Standard features

• 1200 °C maximum operating temperature
• Carbolite Gero 301 controller, with single ramp to set-point & process timer
• Heated lengths, single zone 150, 300, 450 or 600 mm (EST)
• Heated lengths, 3-zone 450 or 600 mm (EZS)
• Accepts work tubes with outer diameters up to 60 mm
• Wire elements in high quality vacuum formed insulation ensure fast heat up, excellent temperature uniformity and short cool down times
• Furnace splits into two halves and accommodates tubes or samples fixed into a test rig
• Outer mesh guard ensures operator safety

Options (specify these at time of order)

• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• A range of additional work tubes, end seals and work tube packages is available for use with modified atmosphere and/or vacuum
• Vacuum packages with a choice of rotary vane pump or turbomolecular pump are available for furnaces with tube inner diameters of 60 mm and above
• Wide choice of tube diameters and materials is available: eg quartz, ceramic, metal
• Insulation plugs & radiation shields to prevent heat loss & improve uniformity

Content may be subject to modifications or corrections

The compact horizontal tube furnace range EHA / EHC uses free radiating wire elements embedded within the insulation of the furnace body. 

The benefit of this design is its flexibility with the use of tube adapters the same tube furnace can be used with a variety of tube diameters. 

The EHA are single zone furnaces and the EHC are three zone furnaces. 

This range of tube furnaces does not include an integral work tube and one must be selected as an additional item. The work tube length is dependent on the application eg for use with modified atmosphere or vacuum. The use of a separate work tube has the advantage of protecting the heating elements from damage or contamination.

Standard features

• 1200 °C maximum operating temperature
• Carbolite Gero 301 digital PID controller with single ramp to setpoint and process timer
• Heated lengths, single zone 150, 300, 450 or 600 mm (EHA)
• Heated lengths, 3-zone 450 and 600 mm (EHC)
• Accepts work tubes with outer diameters up to 60 mm
• Wire elements in high quality vacuum formed insulation ensure fast heat up, excellent temperature uniformity and short cool down times
• Horizontal configuration
• Outer mesh guard ensures operator safety

Options (specify these at time of order)

• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• A range of additional work tubes, end seals and work tube packages is available for use with modified atmosphere and/or vacuum
• Vacuum packages with a choice of rotary vane pump or turbomolecular pump are available for furnaces with tube inner diameters of 60 mm and above
• Angle adjustment option allows horizontal and multiangle configuration (EHC)
• Wide choice of tube diameters and materials is available: eg quartz, ceramic, metal
• Insulation plugs & radiation shields to prevent heat loss & improve uniformity

Content may be subject to modifications or corrections

These compact universal split tube furnaces use free radiating wire elements embedded within the insulation of the furnace body. The benefit of this design is its flexibility with the use of tube adapters the same furnace can be used with a variety of tube diameters. 

The single zone EVT and 3-zone EVZ split tube furnaces comprise a furnace body which is hinged and split into two halves along its length. This makes exchange of work tubes easier and also enables the furnace to be used with reactors or work tubes where end flanges would make insertion into a non-split furnace difficult. 

The 3-zone EVZ furnaces provide excellent uniformity resulting from division of the heated length into 3 zones with its own controller and thermocouple. This range of tube furnaces does not include an integral work tube which must be selected as an additional item. The work tube length is dependent on the application, for example, for use with modified atmosphere or vacuum.

The use of a separate work tube has the advantage of protecting the heating elements from damage or contamination.

Standard features

• 1200 °C maximum operating temperature
• Carbolite Gero 301 controller, with single ramp to set-point & process timer
• Heated lengths, single zone 150, 300, 450 or 600 mm (EVT)
• Heated lengths, 3-zone 450 or 600 mm (EVZ)
• Accepts work tubes with outer diameters up to 60 mm
• Wire elements in high quality vacuum formed insulation ensure fast heat up, excellent temperature uniformity and short cool down times
• Furnace splits into two halves and accommodates tubes or samples fixed into a test rig
• Outer mesh guard ensures operator safety

Options (specify these at time of order)

• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• A range of additional work tubes, end seals and work tube packages is available for use with modified atmosphere and/or vacuum
• Vacuum packages with a choice of rotary vane pump or turbomolecular pump are available for furnaces with tube inner diameters of 60 mm and above
• Wide choice of tube diameters and materials is available: eg quartz, ceramic, metal
• Insulation plugs & radiation shields to prevent heat loss & improve uniformity

Content may be subject to modifications or corrections

The compact vertical tube furnace range EVA / EVC uses free radiating wire elements embedded within the insulation of the furnace body. 

The benefit of this design is its flexibility with the use of tube adapters the same tube furnace can be used with a variety of tube diameters. 

The EVA are single zone furnaces and the EVC are three zone furnaces. 

This range of tube furnaces does not include an integral work tube and one must be selected as an additional item. The work tube length is dependent on the application eg for use with modified atmosphere or vacuum. The use of a separate work tube has the advantage of protecting the heating elements from damage or contamination.

Standard features

• 1200 °C maximum operating temperature
• Carbolite Gero 301 controller, with single ramp to set-point & process timer
• Heated lengths, single zone 150, 300, 450 or 600 mm (EVA)
• Heated lengths, 3-zone 450 and 600 mm (EVC)
• Accepts work tubes with outer diameters up to 60 mm
• Wire elements in high quality vacuum formed insulation ensure fast heat up, excellent temperature uniformity and short cool down times
• Vertical configuration (can also be used horizontally)
• Control module with 2 metre conduit to furnace
• Outer mesh guard ensures operator safety

Options (specify these at time of order)

• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• A range of additional work tubes, end seals and work tube packages is available for use with modified atmosphere and/or vacuum
• Vacuum packages with a choice of rotary vane pump or turbomolecular pump are available for furnaces with tube inner diameters of 60 mm and above
• Angle adjustment option allows horizontal and multiangle configuration
• Wide choice of tube diameters and materials is available: eg quartz, ceramic, metal
• Insulation plugs & radiation shields to prevent heat loss & improve uniformity

Content may be subject to modifications or corrections

BLF bottom loading furnaces use an electrically operated elevator hearth, which as it rises into the furnace chamber, lifts the load into the heated zone.

This furnace provides the following advantages: easy loading of samples and uniform heating achieved by locating elements in all six side walls of the chamber. 

The 1600 °C is ideal for sintering of zirconia dental crowns and frameworks. The silicon carbide heating elements will not cause discolouration of the zirconia.

Standard features

• 1600°C, 1700°C & 1800°C maximum operating temperature
• 3 to 21 litre capacities
• Programmable 3216P1 controller
• Ideal for: sintering high performance ceramics, melting glass under high temperature or working with modified atmospheres
• Rapid heating & cooling cycles can be achieved through raising & lowering the hearth
• Electrically operated elevator hearth protects operator from the chamber's radiant heat
• Hearth cage with safety interlock
• Excellent temperature uniformity as a result of the hexagonal chamber
• Overtemperature protection to protect load or furnace during unattended operation
• 1600 °C model heated by silicon carbide elements
• 1700 °C & 1800 °C models heated by molybdenum disilicide elements

Options (specify these at time of order)

• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
• Compatible crucibles
• Modified hearth for the introduction of gases into an inverted crucible (not gas tight)
• Radiation shutter
• Customised options including: adaptation to introduce thermocouple or stirrer through the chamber roof and rotating hearth
• Plasma sprayed alumina protection tube to protect heating elements from sample contamination

Content may be subject to modifications or corrections

The laboratory HTF high temperature furnace range comprises 
1700 °C and 1800 °C models.

The two smaller models in each temperature are bench mounted and the larger units are floor-standing. These furnaces may be customised in order to satisfy specific customer requirements, e. g. the addition of catalytic afterburners for ceramic binder burn-off applications.

Standard features

• 1700°C & 1800°C maximum operating temperature
• From 4 to 27 litre capacities
• High quality molybdenum disilicide heating elements
• Vertical lift door keeps heated surface away from the user
• Advanced refractory interior, used in combination with energy efficient low thermal mass insulation
• Programmable 3216P1 controller
• Over-temperature protection
• Digital RS232 communications on the following models: HTF 17/5, HTF 17/10, HTF 18/4 & HTF 18/8
• Fan cooling for low external case temperature
• The HTF 17/25 & HTF 18/15 both have electric door actuation

Options (specify these at time of order)

• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
• RS232 & RS485 communications (HTF17/25, HTF18/15 & HTF18/27)

Content may be subject to modifications or corrections

The RHF range of silicon carbide heated high temperature chamber furnaces comprises four chamber sizes, each available with three maximum operating temperatures of 1400 °C, 1500 °C and 1600 °C. 

Robust construction and high quality elements provide rapid heating rates (typically reaching 1400 °C in under 40 minutes) and a long reliable working life.

Standard features

• 1400°C, 1500°C or 1600°C maximum operating temperature
• Carbolite Gero 301 controller, with single ramp to set-point & process timer
• 3, 8, 15 or 35 litre chamber volumes
• Vertical lift door keeps heated surface away from the user
• Soft closing door (3 & 8 litre models only)
• Silicon carbide heating elements provide long life and are able to withstand the stresses of intermittent operation
• RHF 3 & 8 litre have a cast alumina hearth; RHF 15 & 35 have silicon carbide hearth
• low thermal mass insulation for high energy efficiency

Options (specify these at time of order)

• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications

Content may be subject to modifications or corrections

Charge saggar, starter-set

Automated table lowering for cooling

Due to their maximum temperature of 1650 °C and their large furnace chamber, the high-temperature bottom loading furnaces are perfectly suited for sintering translucent zirconia. The motor-driven lifting table significantly simplifies the charging of the high-temperature furnace. The all-around heating of the cylindrical furnace chamber ensures a very even temperature uniformity.

Equipped with special heating elements made of molybdenum disilicide, chemical interactions between the charge and the furnace components are optimally avoided. The sintered material is placed in saggars made of technical ceramics. Up to two batch containers for max. 15 single crowns per level can be accommodated in the LHT 01/17 LB Speed. The LHT 02/17 LB Speed offers space for up to three saggars for max. 25 individual crowns per level and thus guarantees high productivity.

The high-temperature bottom loading furnaces are additionally equipped with a drying as well as a forced cooling function. For residual drying, the oven remains open gapwise during heating up to a defined temperature and thus ensures reliable removal of moisture. For accelerated cooling, the furnace is automatically opened step by step under program control. Depending on the batch used and the saggars, these high-temperature furnaces can achieve total cycle times of less than two and a half hours. The furnaces can be individually programmed for all recommended sintering curves of all zirconia manufacturers.

• Tmax 1650  °C
• Furnace chamber with a volume of 1 or 2 liters, table with large floor space
• High-quality heating elements made of molybdenum disilicide offer best possible protection against chemical interaction between charge and heating elements
• Appealing, double-walled stainless steel housing
• Only fiber materials are used which are not classified as carcinogenic according to TRGS 905, class 1 or 2
• Outstanding temperature uniformity due to all-round furnace chamber heating
• Scope of delivery includes a starter set for charging on one level, additional levels as additional equipment
• Precise, motorized toothed belt drive of the table with button operation
• Residual drying function for better ventilation of the oven when heating up
• Forced cooling function with automatic, step-by-step opening from a preset temperature
• Exhaust air vent in the roof
• Type S thermocouple
• Controller P480 with memory for 50 programs, 2 sample programs
• Usable for sintering blanks of all leading manufacturers
• Drying function: When starting the program the table will be driven in drying position and closes automatically at 500  °C
• Defined application within the constraints of the operating instructions
• NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

• Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
• Stackable saggars for loading in up to two or three levels, depending on model
• Process control and documentation via VCD software package for monitoring, documentation and control

High-Temperature Furnaces up to 1650 °C for Sintering Translucent Zirconia

LHT 01/17 D	LHT 03/17 D

Saggars with top lid for high-temperature furnace LHT 01/17 D

Charge saggar, starter-set for high-temperature furnace LHT 03/17 D

Over-temperature limiter

These high-temperature furnaces are ideally suited for sintering bridges and crowns made of translucent zirconia. The special heating elements made of molybdenum disilicide promise the best possible protection against chemical interaction between the charge and the furnace components. The bridges and crowns are loaded in ceramic saggars. These high-temperature furnaces are particularly convincing due to their excellent price-performance ratio. The furnaces can be individually programmed for all recommended sintering curves by almost all zirconium manufacturers.

• Tmax 1650  °C
• Furnace chamber with a volume of 1 or 4 liters
• Special heating elements made of molybdenum disilicide offer best possible protection against chemical interaction between charge and heating elements
• Dual shell housing made of textured stainless steel sheets with additional fan cooling for low surface temperature
• Only fiber materials are used which are not classified as carcinogenic according to TRGS 905, class 1 or 2
• Compact design with lift door, opening upwards
• Scope of delivery includes a starter set for charging on one level, additional levels as additional equipment
• Adjustable air inlet
• Furnace chamber can be charged with up to two (LHT 01/17D) or three (LHT 03/17D) saggars, 15 or 25 individual crowns per level (depending on model)
• Exhaust air opening in the roof
• Type S thermocouple
• Precise temperature control, also in the lower temperature range for drying
• Controller P480 (LHT 01/17 D) or P470 (LHT 03/17 D) with memory for 50 programs
• Freely usable for sintering blanks of almost all leading manufacturers
• Defined application within the constraints of the operating instructions
• NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

• Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
• Saggar for charging of up to three layers
• Process control and documentation via VCD software package for monitoring, documentation and control

High-Temperature Furnace with SiC Rod Heating for Sintering Zirconia up to 1550 °C

LHTCT 01/16	LHTCT 01/16

Furnace chamber with high-quality fiber materials and SiC heating rods on both sides of the furnace

Saggars with top lid

Designed as a table-top model with SiC heating rods, this comparably inexpensive high-temperature furnace offers numerous advantages when sintering non-translucent zirconia with an operating temperature of up to 1500 °C. Compared to other models, however, the costs for changing the heating elements are higher.The large heating chamber and fast heat-up times make this model a good choice for CAD/CAM machining of zirconia. The controller of the furnace is freely programmable for the individual sintering of the zirconia material. The high-temperature furnace is also designed for connection to the single-phase power grid.

• Tmax 1550  °C
• Working temperature 1500  °C, increased wear and tear must be expected in case of working at higher temperatures
• Single-phase connection (LHTCT 01/16)
• Dual shell housing made of textured stainless steel sheets with additional fan cooling for low surface temperature
• Only fiber materials are used which are not classified as carcinogenic according to TRGS 905, class 1 or 2
• Adjustable air inlet
• Type S thermocouple
• Controller C450
• Switching system with solid-state-relays, power tuned to the SiC rods
• Easy replacement of heating rods
• Defined application within the constraints of the operating instructions
• NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

• Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
• Square saggar for charging of up to three layers (15 single crowns)
• Lid for top saggar
• Process control and documentation via VCD software package for monitoring, documentation and control

Accessories for Sintering Furnaces

Charge Saggars for Sintering Furnaces LHT 02/17 LB Speed, LHTCT 03/16 and LHT 03/17 D

For charging zirconia workpieces charge saggars are recommended. A saggar basically consists of the sintering dish as base and the spacer ring with ventilation openings. The material is highly resistant to temperature fluctuations and can be used for processes with short heat-up and cool-down times.

When charging the furnace it must be ensured that the lower charge carrier is generally resting on the spacer ring. This provides for air-circulation under this carrier and improves the temperature uniformity. It is recommended to cover upper saggar with another sintering dish as lid.

The starter set consists of a charge saggar, a spacer ring as a base and a second sintering dish as lid. The use of additional saggars (sintering dish and spacer ring) allows charging on additional levels. Both furnace models are designed to get charged with up to three charge saggars.

Number of required charge levels in overview:

• 1 level: Starter set which includes 2 sintering dishes and 2 spacer rings
• 2 levels: Starter set + 1 sintering dish + 1 spacer ring
• 3 levels: Starter set + 2 sintering dishes + 2 spacer rings

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Starter-Set, Ø 115 mm Article No.: 699001066	Sintering Dish, Ø 115 mm Article No.: 699001054	Spacer Ring with Ventilation Openings Article No.: 699001055

Charge Saggar for Sintering Furnaces LHT 01/17 Speed, LHTCT 01/16 and LHT 01/17 D

Placing the zirconia product in charge saggars provides for optimum utilization of the furnace chamber. Up to three saggars can be stacked in the furnaces. The integrated air slots ensure a better air circulation of the charge. The upper saggar can be closed with a separate ceramic lid.

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Safe charging on up to three levels	Charge Saggar, 110 x 75 x 30 mm Article No.: 699000279	Lid for Charge Saggar Article No.: 699000985

The CWF range of general purpose laboratory chamber furnaces is bench mounted. Models are available in five sizes with a maximum operating temperature up to 1300 °C.

The airflow in the CWF-B furnaces is enhanced by the addition of air inlet holes in the door and a tall chimney which rapidly removes the fumes from the furnace. 

The CWF-BAL furnace with integral balance can be used for thermogravimetric analysis (TGA) and loss on ignition (LOI) applications, where weight change of the sample must be monitored during the heating process. This is required, for example, in the determination of inorganic matter content in materials such as cement, lime, calcinated bauxite and refractories. For applications involving organic matter content, please refer to the AAF-BAL.

Standard features

• 1100°C, 1200°C or 1300°C maximum operating temperature
• 5, 13, 23, 36 or 65 litre chamber volumes
• Carbolite Gero 301 controller, with single ramp to set-point & process timer
• Vertical lift door keeps heated surface away from the user
• Soft closing door on 5, 13, 21 & 23 litre models
• Delayed start / process timer function as standard
• Hard wearing alumina element carrier, furnace entrance and hearth
• Energy efficient low thermal mass insulation
• Free radiating wire wound elements for optimum uniformity
• Easy access to elements & controls simplifies maintenance & servicing
• CWF-B: Enhanced airflow from tall chimney & door vents for full combustion
• CWF-BAL: With integrated balance that runs independently of the furnace control system
• CWF-BAL: Software supplied with the balance may be used to monitor the balance reading via a computer
• CWF-BAL: Maximum capacity of balance is 3 kg with a resolution of 0.01 g (other capacities available)

Options (specify these at time of order)

• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
• A range of metallic retorts to work with modified atmospheres up to 1150°C
• AMS2750E Nadcap compatible models are available for aerospace applications
• CWF-BAL: 8 kg balance with a resolution of 0.1 g

Technical details

Airflow in CWF-B

1. Air inlets through the door plug
2. Airflow through the chamber promotes burning of the samples
3. Chimney pulls air through the chamber

Content may be subject to modifications or corrections

The ELF laboratory furnaces comprise 3 bench mounted models designed for light duty and general use up to 1100 °C.

These laboratory furnaces have a simple drop down door and a top mounted ceramic chimney. The combination of low thermal mass insulation and free radiating wire elements embedded in the chamber sides provide efficient heating.

Standard features

• 1100°C maximum operating temperature
• 6, 14 or 23 litre chamber volumes
• Drop down door with air gap to minimise external temperature
• Carbolite Gero 301 controller, with single ramp to set-point & process timer
• Delayed start / process timer function as standard
• Vacuum formed, low thermal mass insulation
• Hard ceramic hearth fitted as standard
• Ventilated via top mounted ceramic chimney

Options (specify these at time of order)

• Over-temperature protection (recommended to protect valuable contents & for unattended operation)

Content may be subject to modifications or corrections

The KVT / KVZ vertical split tube furnaces have been designed for use with large work tubes or reactor vessels up to 200 mm outer diameter. 

The furnace body is hinged and split into two along its length and is held closed with over-centre clamps providing easy access to reactors or work tube. These furnaces can be used for many applications such as heating reactors in pilot plant or the manufacture of plastic parts in the automotive industry.

The large diameter of the K range furnaces is perfect for heat treatment of wafers and fuel cells. Extended length work tubes of 200 mm diameter are possiblein quartz and APM.

Standard features

• 1200°C maximum operating temperature
• Single zone models fitted with Carbolite Gero 301 PID controller with single ramp to setpoint and process timer
• 3-zone models fitted with 1 x Carbolite Gero 301 PID controller and 2 x 2132 slave end zone controllers
• To suit work tubes or work pieces up to an outside diameter of 200 mm
• Heated length of 600 or 1200 mm
• Furnace splits into two halves to accommodate work tubes or samples fixed into a test rig
• Wire elements in high quality vacuum formed insulation ensure fast heat up, excellent temperature uniformity and short cool down times

Options (specify these at time of order)

• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
• 300 mm diameter on request

Content may be subject to modifications or corrections

The tube furnace range GHA (single zone) / GHC (three zone) uses free radiating wire elements embedded within the insulation of the furnace body. The benefit of this design is its flexibility; with the use of tube adapters the same furnace can be used with a variety of tube diameters. 

The extended uniform zone in the mid-section of the work tube in the GHC 3-zone furnace is achieved with the use of end zone controllers which track the centre zone temperature and compensate for the loss of heat from the tube ends. 

This range of tube furnaces does not include an integral work tube and one must be selected as an additional item. The work tube length is dependent on the application, for example, for use with modified atmosphere or vacuum. The use of a separate work tube has the advantage of protecting the heating elements from damage or contamination.

Standard features

• 1200°C maximum operating temperature
• Carbolite Gero 301 controller, with single ramp to set-point & process timer
• Accepts work tubes with outer diameter up to 170 mm
• Heated lengths, single zone 300, 450, 600, 750, 900, 1050 or 1200 mm (GHA)
• Heated lengths, 3-zone 450, 600, 750, 900, 1050 or 1200 mm (GHC)
• End zones 150 mm long on each end (GHC)
• Long life, rapid heating, resistance wire elements mounted in rigid, vacuum formed insulation modules
• Horizontal configuration mounted on control module
• Furnace mounted directly on top of controller base unit

Options (specify these at time of order)

• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• A range of additional work tubes, end seals and work tube packages is available for use with modified atmosphere and/or vacuum
• Vacuum packages with a choice of rotary vane pump or turbomolecular pump are available for furnaces with tube inner diameters of 60 mm and above
• Wide choice of tube diameters and materials is available: eg quartz, ceramic, metal
• Insulation plugs & radiation shields to prevent heat loss & improve uniformity
• End zones 300 mm long (GHC)
• Modified atmosphere and vacuum assemblies are available
• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• Retransmission of setpoint control configuration to facilitate programmed cooling
• Alternative mounting options are available

Content may be subject to modifications or corrections

The tube furnace range GVA (single zone) / GVC (three zone) uses free radiating wire elements embedded within the insulation of the furnace body. The benefit of this design is its flexibility with the use of tube adapters the same furnace can be used with a variety of tube diameters. 

The extended uniform zone in the mid-section of the work tube in the GVC 3-zone furnace is achieved with the use of end zone controllers which track the centre zone temperature and compensate for the loss of heat from the tube ends. 

This tube furnace range does not include an integral work tube and one must be selected as an additional item. The work tube length is dependent on the application, for example, for use with modified atmosphere or vacuum. The use of a separate work tube has the advantage of protecting the heating elements from damage or contamination.

Standard features

• 1200°C maximum operating temperature
• Carbolite Gero 301 controller, with single ramp to set-point & process timer
• Accepts work tubes with outer diameter up to 170 mm
• Heated lengths, single zone 300, 450, 600, 750, 900, 1050 or 1200 mm (GVA)
• Heated lengths, 3-zone 450, 600, 750, 900, 1050 or 1200 mm (GVC)
• Long life, rapid heating, resistance wire elements mounted in rigid, vacuum formed insulation modules
• End zones 150 mm long on each end (GVC)
• End zone control via back to back thermocouples (GVC)
• Supplied with versatile stand for vertical, wall mounted and horizontal use
• Control module with 2 metre conduit to furnace

Options (specify these at time of order)

• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• A range of additional work tubes, end seals and work tube packages is available for use with modified atmosphere and/or vacuum
• Vacuum packages with a choice of rotary vane pump or turbomolecular pump are available for furnaces with tube inner diameters of 60 mm and above
• Wide choice of tube diameters and materials is available: eg quartz, ceramic, metal
• Available without stand (comprising control module & furnace body)
• Insulation plugs & radiation shields to prevent heat loss & improve uniformity
• End zones 300 mm long (GVC)
• Modified atmosphere and vacuum assemblies are available
• Control module on longer 6 metre conduit (GVC)
• Retransmission of Setpoint control configuration to facilitate programmed cooling

Content may be subject to modifications or corrections

These models stand out for their excellent workmanship, advanced and attractive design, and high level of reliability. Heating elements on support tubes radiating freely into the furnace chamber provide for particularly short heating times and a maximum temperature of 1400 °C. These muffle furnaces are a good alternative to the familiar L(T) ../11 series when higher application temperatures are needed.

• Tmax 1400 °C
• Heating from two sides
• Heating elements on support tubes ensure free heat radiation and a long service life
• Only fiber materials are used which are not classified as carcinogenic according to TRGS 905, class 1 or 2
• Dual shell housing for low external temperatures and high stability
• Adjustable air inlet integrated in door
• Exhaust air outlet in rear wall of furnace
• Solid state relays provide for low-noise operation
• Defined application within the constraints of the operating instructions
• NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

• Chimney, chimney with fan or catalytic converter
• Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
• Protective gas connection to purge with non-flammable protective or reaction gases (not available in combination with chimney, chimney with fan or catalytic converter)
• Manual or automatic gas supply system
• Process control and documentation via VCD software package for monitoring, documentation and control

The muffle furnaces L 1/12 - LT 40/12 are the right choice for daily laboratory use. These models stand out for their excellent workmanship, advanced and attractive design, and high level of reliability. The muffle furnaces come equipped with either a flap door or lift door at no extra charge.

• Tmax 1100 °C or 1200 °C
• Heating from two sides by ceramic heating plates (heating from three sides for muffle furnaces L 24/11 - LT 40/12)
• Ceramic heating plates with integral heating element which is safeguarded against fumes and splashing, and easy to replace
• Insulation made of non-classified fiber material
• Housing made of sheets of textured stainless steel
• Dual shell housing for low external temperatures and high stability
• Optional flap door (L) which can be used as work platform or lift door (LT) with hot surface facing away from the operator
• Adjustable air inlet integrated in door (see illustration)
• Exhaust air outlet in rear wall of furnace
• Solid state relays provide for low-noise operation
• Defined application within the constraints of the operating instructions
• NTLog Basic for Nabertherm controller: recording of process data with USB-flash drive

Additional equipment

• Chimney, chimney with fan or catalytic converter (not for L 1)
• Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
• Protective gas connection to purge with non-flammable protective or reaction gases (not available in combination with chimney, chimney with fan or catalytic converter)
• Manual or automatic gas supply system
• Process control and documentation via VCD software package for monitoring, documentation and control

The RWF rapid wire chamber furnaces are available in three chamber sizes with maximum operating temperatures of 1100 °C or 1200 °C. 

The free radiating wire elements in combination with low thermal mass insulation are designed to provide rapid thermal response within the chamber.

Standard features

• 1100°C or 1200°C maximum operating temperature
• 5, 13 or 23 litre chamber volumes
• Ambient to 1000°C in as little as 10 minutes
• Rapid thermal response from free radiating coiled wire elements
• Low thermal mass insulation for high energy efficiency
• Soft closing, vertical lift door keeps heated surface away from the user
• Carbolite Gero 301 controller, with single ramp to set-point & process timer
• Soft closing parallel action door keeps heated surface away from the user
• Hard wearing hearth

Options (specify these at time of order)

• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications

Content may be subject to modifications or corrections

The PTC thermocouple calibration furnace is designed to provide a high stability portable heat source for the calibration of thermocouples using the comparison method.

Standard features

• 1200°C maximum operating temperature
• High stability heat source with temperature range 400 to 1150°C
• Accepts thermocouples up to 7.5mm diameter
• Thermocouple is inserted & compared to the PTC 12/20's displayed temperature
• PID temperature control & separate temperature display to 1.0°C resolution
• The special work tube design provides better temperature uniformity than is typical for a furnace of this size
• The metallic work tube is earthed for operator safety when testing metal sheathed mineral insulated mineral thermocouples
• Rapid heat up and stabilisation makes it ideal for use in the laboratory or on site
• Portable & self contained

Options (specify these at time of order)

• Factory calibration certificate stating the error between the workspace temperature & the displayed value at 700°C, 900°C, & 1100°C
• A UKAS traceable calibration certificate for customer defined setpoints is available
• A UKAS calibrated thermocouple is available

Content may be subject to modifications or corrections

These top loading chamber furnaces are particularly suited for applications involving tall crucibles and heavy components. 

Heating elements in all four walls minimise the risk of damage from spills and ensures good temperature uniformity. The smaller two furnaces may be benchmounted, but best access is provided when these furnaces are located on the floor.

Standard features

• 1200°C maximum operating temperature
• 5, 10, 23 or 100 litre chamber volume
• Free radiating wire elements in all 4 sides of chamber
• Vented top opening door
• Angled control panel, protected but clearly visible
• Carbolite Gero 301 controller, with single ramp to set-point & process timer
• Thermocouple protected by ceramic sheath

Options (specify these at time of order)

• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications

Content may be subject to modifications or corrections

The Carbolite Gero STF single zone and TZF 3-zone high temperature tube furnace range is available at 1500 °C and 1600 °C with both models using silicon carbide heating elements. 

This range of tube furnaces does not include an integral work tube and one must be selected as an additional item. The work tube length is dependent on the application eg for use with modified atmosphere or vacuum. 

The TZF 3-zone high temperature tube furnace has heated lengths of 450 and 610 mm. An extended uniform zone in the mid-section of the work tube is achieved with the use of end zone controllers which track the centre zone temperature and compensate for the loss of heat from the tube ends.

Standard features

• 1500°C & 1600°C maximum operating temperatures
• Single zone models fitted with Carbolite Gero 301 PID controller with single ramp to setpoint and process timer
• 3-zone models fitted with 1 x programmable 3216P1 and 2 x 3216CC end zone controllers, with retransmission of setpoint
• Accepts work tubes up to 60 or 90 mm outer diameter depending on model
• Heated lengths, single zone 180, 450 or 610 mm (STF)
• Heated lengths, 3-zone 450 or 610 mm (TZF)
• Silicon carbide heating elements
• Horizontal configuration

Options (specify these at time of order)

• A range of sophisticated digital controllers, multi-segment programmers and data loggers is available. These can be fitted with RS232, RS485 or Ethernet communications
• Over-temperature protection (recommended to protect valuable contents & for unattended operation)
• Alternative mounting options are available
• Optionally configured for 2 phase or 3 phase electrical supply (depending on model)
• A range of additional work tubes, end seals and work tube packages is available for use with modified atmosphere and/or vacuum
• Vacuum packages with a choice of rotary vane pump or turbomolecular pump are available for furnaces with tube inner diameters of 60 mm and above
• Wide choice of tube diameters and materials is available: eg quartz, ceramic, metal
• Insulation plugs & radiation shields to prevent heat loss & improve uniformity
• Control module with 2 meter conduit to furnace (TZF)
• Hook and strap work tube support

Content may be subject to modifications or corrections

The HTK range of Carbolite Gero high temperature furnaces consists of metallic furnaces made of Molybdenum and Tungsten. 

The rectangular design with a front door allows for easy loading and unloading. The HTK range is available in three different sizes. The smallest designs with a capacity of 8 litres and 25 litres are typically employed by laboratories for research and development. The 80 litre furnaces are predominantly used as pilot manufacturing systems or large scale production. 

The metallic furnaces constructed of tungsten (HTK W) or molybdenum (HTK MO) permit the greatest possible purity of inert atmosphere and final vacuum level in the high vacuum region (5 x 10^-6 mbar). Upon request, an ultra-high vacuum can be configured. Common gases that are typically used include: Nitrogen, Argon, Hydrogen or mixtures. 

The heating elements are made from the same metallic material as the insulation. The heating insulation is constructed of several radiation shields constructed from tungsten or molybdenum with respect to the furnace type selected. A retort can be utilized for gas flow guidance or to improve the temperature uniformity. The maximum temperature for the HTK W is 2200 °C and 1600 °C in the HTK MO.

Application Examples

carbon free atmosphere, metal injection moulding (MIM), metallization, sintering

Standard features

• Metallic furnaces provide a precisely defined atmosphere with the highest possible purity (6 N or better)
• Metallic furnaces offer the best possible vacuum
• Hydrogen partial pressure operation if requested
• Precisely controlled vacuum pumping speeds appropriate for powders
• Data recording for quality management

Technical details

View inside of the HTK

1. frame
2. water cooled vessel
3. heating cassette
4. groove for the sealing
5. front door
6. insulation

Inside the chamber, heating elements are positioned at the bottom, left, right, and top sides of the furnace chamber allowing for improved temperature uniformity. For larger volumes, the back wall and front are equipped with heating elements to maintain excellent temperature uniformity. The HTK W, HTK MO, HTK GR and HTK KE furnaces are surrounded by a water cooled vessel; thus classifying, the HTK systems as a cold wall furnace. The cooling water is guided through the double walled vessel.

Content may be subject to modifications or corrections

This weighing furnace with integrated precision scale and software, was designed especially for combustion loss determination in the laboratory. The determination of combustion loss is necessary, for instance, when analyzing sludges and household garbage, and is also used in a variety of technical processes for the evaluation of results. The difference between the initial total mass and the combustion residue is the combustion loss. During the process, the software included records both the temperature and the weight loss.

• Tmax 1100 °C or 1200 °C
• Heating from two sides
• Ceramic heating plates with integral heating element which is safeguarded against fumes and splashing, and easy to replace
• Only fiber materials are used which are not classified as carcinogenic according to TRGS 905, class 1 or 2
• Dual shell housing made of sheets of textured stainless steel
• Optional flap door (L) which can be used as work platform or lift door (LT) with hot surface facing away from the operator
• Adjustable working air inlet in the door
• Exhaust air outlet in rear wall of furnace
• Solid state relays provide for low­noise operation
• Delivery includes base, ceramic plunger with base plate in the furnace lining, precision scale and software package
• 4 scales available for different maximum weights and scaling ranges
• Process control and documentation for temperature and combustion loss via VCD software package for monitoring, documentation and control
• Defined application within the constraints of the operating instructions

Additional equipment

• Chimney, chimney with fan or catalytic converter
• Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
• Observation hole in the door