Tube furnace up to 1350°C - FHA / FHC

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FHA 13/80/500 with control moduleFHA 13/80/500 with optional over temperature control, voltage/current display and high vacuum capable inert gas package. Rotary vane pumps and turbo pumps available as an option.

The FHA, single zone, and FHC, 3-zone, tube furnaces can be used either vertically or horizontally and have a maximum operating temperature of 1350 °C.

The extensive F range of tube furnaces is offered with a wide range of accessories. The furnaces comprise ceramic fibre modules with a high quality 5 mm APM wire heating element mounted in the insulation, held in position by a ceramic holding ridge. The low thermal mass ceramic fibre insulation ensures low energy consumption and allows fast heating rates. The control thermocouple is a high grade type S thermocouple. Additionally, the tube furnace is available with up to 8 heating zones for the most precise temperature control and uniformity.

Application Examples

ageing, annealing, brazing, calcination, catalyst research, CIM, coating, CVD, degassing, drying, hardening, MIM, miniplants, pyrolysis, sintering, soldering, sublimation, synthesis, tempering, test fuel cells, thermocouple calibration

Standard features

  • 1350 °C maximum operating temperature
  • Single zone models fitted with Carbolite Gero 3216CC PID controller with single ramp to setpoint and process timer
  • 3-zone models fitted with 1 x programmable 3216CC and 2 x 3216CC end zone controllers, with retransmission of setpoint
  • Accepts work tubes with outer diameters up to 110 mm
  • Heated lengths of 200, 500, 750, 1000 or 1250 mm
  • Use in horizontal or vertical orientation
  • Exceptional lifetime and temperature stability
  • High grade type S thermocouple
  • Low thermal mass ceramic fibre insulation
  • High quality 5 mm APM wire as heating element
  • Furnace fitted with separate control box with 3 m cable, plug and socket

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)
  • Wide choice of tube diameters and materials is available: eg quartz, ceramic, metal
  • 'L' stand for vertical usage
  • Insulation plugs & radiation shields to prevent heat loss & improve uniformity
  • Modified atmosphere and vacuum assemblies are available
  • Larger tube diameters on request
  • 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
  • Oxygen sensor for inert gas packages

Technical details


View inside of the tube furnace
  1. outer case
  2. end insulation
  3. case insulation
  4. heating elements
  5. inner insulation (hot face)

The rectangular housing is constructed with slots for convection cooling of the outer housing. With insulation made from low thermal mass ceramic fibre material, the heat conduction is reduced to a minimum.

Inside the tube furnace, the heating element is constructed of vacuum formed fibres containing free radiating heating elements that are attached to the insulation by a ceramic holding ridge.

When compared to conventional heating methods, the 5 mm thick heating wires are combined with a low voltage, heavy-weight transformer power supply that provides an extraordinary long lifetime of the heating elements and temperature stability. The control thermocouple is a high grade type S thermocouple. Additionally, each tube furnace model is available with up to 8 heating zones for the most precise temperature control and uniformity.

Content may be subject to modifications or corrections