Products- Details

Innovation and continuous improvement is our mission. To provide our customers with the best applicable solution is our goal.



tmax up to 2400 °C

Chamber furnace, bottom loader, PCW-insulation, high temperature, gastight, Tmax 2400 °C, 2-1000 l


annealing, bright annealing, graphitization/carbonisation, heat treatment, melting, reduction, remelting, sintering

The most important characteristics

  • Resistance heated by MoSi2, molybdenum, tungsten or graphite heater
  • Chamber furnace in bottom loader design
  • gastight
  • Max. operating temperatures up to 2400 °C
  • 4-sided heated
  • Insulation of a combination of high-quality PCW-materials, graphite felt or refractory bricks (bubble alumina)
  • Extremely short heating up and cooling down times
  • High energy efficiency
  • Wide range of options for customer-specific adaption
  • Quality made in Germany
  • Easy handling


We make it possible

Linn High Therm is specialized in adapting its products to customer’s requirements. Please let us know if you need any modifications apart from our standard offer. We will do everything to satisfy your wishes.


Standard options

  • Different temperature controllers
  • Gassing unit for save operation when using flammable and explosive gases, burning-off device with flame supervision for save operation when using flammable and explosive gases
  • Safety package for safe operation
  • Gas warning system for safe operation when using flammable and explosive gases
  • Insulation for hydrogen operation, energy saving when using gases with high heat conductivity
  • Viewing glass for visual process control or additional pyrometer measuring
  • Condensate trap for “dirty” processes such as debinding, pyrolysis
  • Process guiding software for full control and documentation via PC

Other options

  • Multi-zone-heating for best temperature accuracy
  • Trailing thermocouples
  • Gas recooling for fast cycles
  • Bursting disc as safety component
  • Temperature recorder
  • Quick lock furnace door bottom
  • Design according to ATEX guide lines                                                    


Technical data

Furnace housing

The protective gas and vacuum tight, from all sides reinforced inner housing is cooled by a fan to avoid outer wall temperatures of the housing of 180 °C, also during continuous operation.

The corresponding designed outer housing remains cool (max. 40 °C above room temperature).

The furnace bottom with a special sealing can be automatically moved up and down with a mechanism and is guided via a strand guide section.

The protective gas respectively vacuum tight bottom door is designed as explosion door (pressure limit appr. 10 – 20 mbar) and intended with turn-locks with adjustable spring pressure resistors.

On the rear side of the furnace there are connection flanges for inlet and outlet of protective gas, vacuum and the thermocouple.

Door flange, connections for thermocouple and heating elements as well as gas outlet are water cooled.


The inner housing is lined with high-quality insulation materials (graphite or high temperature bricks as well as PCW plates). Lightweight, low energy consumption materials enable extremely short heating up and cooling down times (brick insulation excluded).


The furnace is heated on four sides by replaceable MoSi2, Mo, W or graphite heating elements, which are operated by a 3-phase thyristor unit with phase-angle and a transformer. The heating element connections are led out on the furnace rear wall.

Lateral, appr. In the middle of the furnace (seen from the rear wall), there is a PtRh-Pt double thermocouple type S (type B/C) (accuracy: class 2 according to DIN IEC part 2), which measures the temperature. A thermoelement pair leads to the temperature controller, the other one to the safety controller. A pyrometer measuring is (optionally) carried out laterally or from the cover.


Switch and control unit

1 pc. Lockable safety controller for additional protection of heating and insulation

1 pc. 3-phase thyristor unit for phase-angle and current limitation

1 pc. pre-transformer

1 pc. Working hours counter

3 pcs. power indicator




Product properties

Product Line: type series
Operation Mode: Batch
Construction Types: Furnace
Designs: Bottom loader furnace, Chamber furnace
Temperature Max (°C): 2400
Heatings: electrical
Heatingmethods: resistance
Atmospheres: Air, Controlled gas atmosphere, Vacuum
Applications: annealing, bright annealing, graphitization/carbonisation, heat treatment, melting, reduction, remelting, sintering