Tube Furnaces to 1200ºC

ST 12 – Tube furnace range 1200°C maximum operating temperature

  • 9 Standard models
  • Alternative sizes made to order
  • Accurate control
  • Economical to operate
  • Efficient Low thermal mass insulation
  • Graded wire wound heating elements
  • Sillimanite chamber tube
  • Microprocessor based digital control
  • Independent over heat protection option


The insulations used are of the highest quality and are of the latest types available, graded for optimum efficiency to reduce heat losses and enhance a uniform working zone.

ST12 furnaces are constructed with a robust mild steel casing attractively finished in hammer blue paintwork, for bench mounting, and designed with vented double skin construction ensuring that the furnace casing remains relatively cool.

A type N thermocouple probes the furnace tube for accurate measurement and control.

Heating: A hard wearing sillimanite tube forms the furnace chamber with high quality spiraled wire heating elements carefully positioned and fixed in place to produce a uniform hot zone. Power switching to the elements is by means of solid state relays for accuracy and reliability.

Controls: For ease of vision the controls are on one side of the furnace casing, below the furnace body. A microprocessor based digital temperature controller with set-point and process displays, provides accurate fully automatic control.  A fully adjustable independent digital over-temperature protection controller with manual reset can be fitted if required. Controls include thermocouple break protection.

Other sizes, as well as vertical tube; multi-tube, and split tube furnaces can be made to order. Single open ended tube furnaces are also available.


Single tube furnaces (Horizontal tube layout) 

Model No Max Temp
Tube Bore Dia.(mm) Heated
length (mm)
External Dimensions (mm)
H x L x D
Power 230V kW
ST12/25/250 1200 25 250 550 x 300 x 350 0.75
ST12/25/500 1200 25 500 550 x 550 x 350 1
ST12/38/250 1200 38 250 550 x 300 x 350 1
ST12/38/500 1200 38 500 550 x 550 x 350 1.5
ST12/50/300 1200 50 300 600 x 350 x 350 1.5
ST12/50/610 1200 50 610 600 x 660 x 350 2
ST12/75/610 1200 75 610 600 x 660 x 350 3
ST12/75/750 1200 75 750 600 x 800 x 350 3
ST12/100/940 1200 100 940 650 x 1000 x 450 4

Options include: alternative models of temperature controls / programmers / recorders / communications / timers / work tubes / tube end caps, seals and baffles etc.

The information and data herein are offered solely for your consideration and guidance and are not to be construed as a warranty or specification.

Nothing contained herein is to be interpreted as authorisation to practice a patented invention without a licence.