Shaped heaters supported on ceramic plates


Cage rod elements consist of metallic heaters and electrically non-conductive parts such as ceramic plates or spacers. These ceramic plates serve as insulation between heater and radiant tube. Also, holes and grooves in the ceramic plates receive the heaters, which in this way are kept electrically insulated from each other. The central rod is necessary to bind the ceramic parts together.
Heaters can be made from CrFeAl alloys or from NiCr alloys, depending on working conditions, temperature and atmosphere. Cold ends can be created by inserting ceramic parts between electrical connection and heating part. To prevent the heater from overheating, it is recommended to use one safety thermocouple per element or at least one per heating zone on furnace. Power depends on the element diameter, length and temperature.


  • Melting processes and casting plants
  • Enameling, holding and other industrial furnaces
  • Heat treatment applications
  • Steel and aluminum industry
  • Automotive and general engineering industry

Technical data

Type of heating



Heater: FeCrAl alloys or NiCr alloys
Ceramic: Cordierite, Alumina
Central rod: Stainless steel
Insulator: Ceramic fiber


Standard diameter: Ø68mm, Ø168mm
Length: 400-2000mm
Other dimensions available upon request


Vertical or horizontal installation position
Mounted inside tube or or stand-alone


Terminal rods for electrical connection, with or without thread


Acc. to customer specification


Power: 5000-20000W
Voltage: 55V, 76.6V, or acc. to customer request
Maximum operating temperature:
1250°C for FeCrAl alloys
1150°C for NiCr alloys


  • Can be used inside tubes or as stand-alone elements
  • Can be installed both horizontally and vertically
  • Long service life
  • Savings in replacement and maintenance costs
  • Higher power output compared to conventional heaters

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