Compact Vertical Split 1"or 2'' Quartz Tube Furnace with SS Vacuum Flanges - OTF-1200X-S-VT

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Part Number: OTF-1200X-S-VT


OTF-1200X-S-VT is a compact-split Vertical Tube Furnace with vacuum sealed 1“, 2" or 2.36"(60mm) diameter quartz tube. It provides fast heating and quenching as well as the capability to heat samples under vacuum or flowing gas atmospheres. A precision temperature controller can provide up to 30 segments of heating, cooling, and dwelling steps with +/- 1 oC accuracy.  It is an ideal furnace for carrying out quenching tests. New!!! the electric components of the 220V version OTF-1200X-S-VTare UL/CSA certified, and the 220V version is ready to pass UL or CSA certification (UL61010 or SPE1000) on customer side at customer cost. (01/22/2014)


Furnace Casing
  • Double layer steel structure with air cooling
  • Split door design for easy installation of tube
  • High purity Al2O3 fibrous insulation designed for maximum energy saving




AC 110V or 220V Single Phase, 50/60 Hz

Max. Temperature


Continuous Temperature


Max. Heating Rate

<= 20 oC /min

Tube Size and Materials

Select the tube sizeļ¼š
25mm O.D x 20mm I.D x 610mm L
50mm O.D x 44mm I.D x 610mm L

Heating Zone Length

200mm  (single zone)

Constant Heating Zone 100mm (+/-2oC)

Temperature Controller

  • 30 programmable segments for precise control of heating rate, cooling rate and dwell time.
  • Built in PID Auto-Tune function with overheating & broken thermocouple protection.
  • Over temperature protection and alarm allows for operation without attendant(s).
  • +/- 1 ºC temperature accuracy.
Heating Elements Fe-Cr-Al Alloy doped by Mo
Vacuum Sealing
  • Two stainless steel flanges with vacuum gauge and valves included
  • A hook ring is welded inside of the top flange for hanging samples or crucibles by wire
  • You may order an optional 2" flange (for 50mm O.D. tubes only) with 1/4" feedthrough port for inserting a thermocouple or rod 
Fitting Ports

Vacuum Level

 0.1 Torr by mechanical pump


 340mm×300mm×1000mm ( W x L x H)

Net Weight

 about 20 Kg (excluding mobile cart)

Shipping Weight

 200 lbs


  • One year limited warranty (Consumable parts such as heating elements, processing tubes and o-rings are not covered by the warranty, please order the replacement at related products below.)


110V version 220V version
  • CE Certified
  • UL / MET / CSA Certification is available upon request, additional charges will apply
  • Transformer is UL Certified
  • CE Certified
  • All electric parts are UL / MET / CSA certified
  • The furnace is ready to pass UL or CSA certification (UL61010 or SPE1000) on customer side at customer cost.

Application Notes



Click here to learn the installation of a gas regulator

  • Tube furnaces with quartz tube are designed for using under vacuum and low pressure < 0.2 bar / 3 psi / 0.02 MPa
  • Attention: A two stage pressure regulator must be installed on gas cylinder to limit the pressure to below 3 PSI for safe operation. Click here to learn the installation of a gas regulator.
  • Vacuum limit definition for all quartz tube furnaces: * Vacuum pressures may only be safely used up to 1000°C 
  • The flow rate for gases should be limited to<200 SCCM (or 200ml/min) for reducing thermal shocks to the tube




Premier Solutions Pte Ltd / MTI Corporation - Compact Vertical Split 1"or 2'' Quartz Tube Furnace with SS Vacuum Flanges - OTF-1200X-S-VT

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