Carbolite FST & FZS Split Tube Furnaces

Code: FST & FZS
  • Single Or Three Zone Split Tube Furnace Range
  • Maximum Temperature 1300°C
  • For Horizontal Or Vertical Use

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Carbolite Gero FST, FZS Horizontal and Vertical Split Tube Furnaces, maximum temperature 1300°C

FST a single-zone furnace range, and the FZS are three-zone models. Both can be used either vertically or horizontally. The split heating module allows either easy positioning of the work tube or positioning around reactors which have fixed end flanges. The split design may also allow faster cooling of the sample. Cooling channels are engineered into the housing to aid with convection cooling of the outer case.

A handle is attached to the upper half of the split tube furnace with two quick-release clamps to unlock and lock the furnace safely. The two furnace halves are ceramic fibre modules with high-quality APM wire heating elements mounted in the insulation, held in position by a ceramic holding ridge. A safety switch protects the operator by switching off the heating elements once the furnace is opened.

Standard features

  • 1300°C maximum operating temperature
  • Programmable temperature controller with 24 segments
  • FST fitted with Carbolite Gero EPC3016P1
  • FZS fitted with Carbolite Gero CC-T1
  • Over-temperature controller with independent thermocouple
  • Accepts work tubes with outer diameters up to 150 mm
  • Single-zone heated lengths of 200, 500 or 1000 mm
  • 3-zone heated lengths of 500 or 1000 mm
  • Split design allows work tubes or reactors with fixed flanges to be accommodated
  • Exceptionally long lifetime and temperature stability
  • High-grade type S thermocouple
  • Low thermal mass ceramic fibre insulation
  • High quality 5 mm APM wire heating element
  • Furnace fitted with separate control box with 3 m cable, plug and socket
  • Ethernet communications


  • ‘L’ stand for vertical usage
  • A range of sophisticated digital controllers, multisegment programmers, and data loggers with digital communication options
  • Robustly shaped ceramic half tubes are available to protect the heating elements and for sample holding
  • A range of additional work tubes end seals and work tube packages for use with modified atmosphere and/or vacuum
  • Larger tube diameters
  • Longer heated lengths
  • Automated opening mechanism
  • Flanges for inert gas counterflow
  • Vacuum packages with a choice of rotary vane pump or turbomolecular pump
  • A wide selection of tube diameters and materials
  • Insulation plugs and radiation shields to prevent heat loss and improve uniformity
  • Oxygen sensor for inert gas packages
  • 6 m length of cable between furnace body and control box with plug and socket
  • Gas packages with manual valve
  • Gas packages with electrically operated valve for up to 3 gases
ModelMax temp °CFurnace Ø mmHeated lengths mmUniform
± 5 °C
Max Power W
Single Zone Horizontal and Vertical Split Tube Furnaces
FST 13/40/2001300402001001500
FST 13/70/5001300705002503000
FST 13/100/50013001005002504000
FST 13/100/10001300100100050010400
FST 13/150/10001300150100050012000
Three Zone Horizontal and Vertical Split Tube Furnaces
FZS 13/70/5001300705003503000
FZS 13/100/50013001005003004000
FZS 13/100/10001300100100080010400
FZS 13/150/10001300150100060012000
FZS 13/200/10001300200100016000
Three Zone Horizontal Split Tube Furnaces
FZS 13/100/15001300100150014000
FZS 13/100/45001300100450045000
FZS 13/150/15001300150150018000
FZS 13/150/45001300150450060000
FZS 13/200/15001300200150022000

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Additional information

Weight0.09 kg