Carbolite HTRH & HTRH-3 High Temperature Horizontal Tube Furnaces

Code: HTRH & HTRH-3
  • Up to 1800°C maximum operating temperature
  • Single & three-zone versions
  •  24 segment programmable controller included

In StockMake An Enquiry

Carbolite Gero HTRH furnaces have a choice of maximum temperature; 1600°C, 1700°C and 1800°C. There are two types of furnaces in the range.

HTRH single-zone horizontal tube furnaces with heated lengths from 100-600 mm. The maximum overall diameter of tube insert is from 40 to 200 mm.

HTRH-3 three-zone versions providing superior temperature uniformity, with heated lengths from 600 mm to 900 mm. The maximum overall diameter of tube insert is from 70 to 150mm. Each zone has its own controller and thermocouple, which is especially useful to preheat gases required for reactions inside the system.

The high-grade insulation materials guarantee low energy consumption and high heating rates due to their low thermal conductivity. The insulation and molybdenum disilicide (MoSi2) heating elements are installed in the rectangular housing. The heating elements are vertically hanging and are easily replaced. At higher temperatures and in the presence of oxygen, MoSi2 develops an oxide (SiO2) layer, which protects the heating elements against further thermal or chemical corrosion.

No integral work tube is supplied as the choice will vary depending on the application.

Standard features

  • 1800°C maximum operating temperature
  • Programmable temperature controller with 24 segments
  • HTRH fitted with Carbolite Gero EPC3016P1
  • HTRH-3 fitted with Carbolite Gero CC-T1
  • Over-temperature protection
  • Accepts work tubes with outer diameters up to 100 mm for use with modified atmosphere
  • Accepts work tubes with outer diameters up to 200 mm for use in air
  • Heated lengths of 100, 250, 300 or 600 mm
  • High-grade thermocouple type B
  • Low thermal mass ceramic fibre insulation
  • High-quality MoSi2 heating elements in a vertical, hanging position
  • Rectangular housing with holes for convection cooling
  • Available with 1 – 3 heating zones
  • Furnace comes with separate control box with 3 m cable, plug and socket
  • Ethernet communications


  • A range of sophisticated digital controllers, multisegment programmers and data loggers with digital communication
  • A range of additional work tubes is available in a variety of materials
  • Insulation plugs & radiation shields for high-temperature vertical tube furnaces to prevent heat loss & improve uniformity
  • Modified atmosphere and vacuum assemblies
  • Vacuum packages with a choice of a rotary vane pump or turbomolecular pump
  • Oxygen sensor for inert gas packages
  • Gas packages with manual or automatic valve for up to 3 gases
  • 6 m long cable between furnace body and control box with plug and socket
ModelMax temp °CFurnace Ø mmHeated lengths mmUniform
± 5 °C
Max Power W
Single Zone Horizontal Tube Furnaces
HTRH 16/40/100160040100502200
HTRH 16/40/2501600402501253600
HTRH 16/40/5001600405002508000
HTRH 16/70/150160070150754500
HTRH 16/70/3001600703001506400
HTRH 16/70/6001600706003008000
HTRH 16/100/1501600100150754800
HTRH 16/100/30016001003001507500
HTRH 16/100/600160010060030010900
HTRH 16/150/600160015060012000
HTRH 16/200/600160020060012000
HTRH 17/40/2501700402501253600
HTRH 17/40/5001700405002508000
HTRH 17/70/150170070150754500
HTRH 17/70/3001700703001506400
HTRH 17/70/6001700706003008000
HTRH 17/100/30017001003001507500
HTRH 17/100/600170010060030010900
HTRH 17/150/600170015060012000
HTRH 17/200/600170020060012000
HTRH 18/40/2501800402501253600
HTRH 18/40/5001800405002508000
HTRH 18/70/3001800703001506400
HTRH 18/70/6001800706003008000
HTRH 18/100/30018001003001507500
HTRH 18/100/600180010060030010900
HTRH 18/150/600180015060012000
HTRH 18/200/600180020060012000
Three Zone Horizontal Tube Furnaces
HTRH-3 16/70/6001600706003508000
HTRH-3 16/100/600160010060035010900
HTRH-3 16/100/900160010090020000
HTRH-3 16/150/600160015060012000
HTRH-3 16/150/900160015090020000
HTRH-3 17/70/6001700706003508000
HTRH-3 17/100/600170010060035010900
HTRH-3 17/100/900170010090020000
HTRH-3 17/150/600170015060012000
HTRH-3 17/150/900170015090020000
HTRH-3 18/70/6001800706003508000
HTRH-3 18/100/600180010060035010900
HTRH-3 18/100/900180010090020000
HTRH-3 18/150/600180015060012000
HTRH-3 18/150/900180015090020000

Enquire About This Product

Title Size
HTRH Range 204 KB
Manual HTRH-HTRV 852 KB

Additional information

Weight0.09 kg