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Three Zones 1200C Vertical Tube Furnace with 2" Quartz Tube & Vacuum Flanges - OTF-1200X-VT-III-50

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OTF-1200X-VT-III-50 is Three Heating Zone Split Vertical Tube Furnace with vacuum-sealed 50 mm diameter quartz tube. Not only it can achieve faster sample heating and quench ing in vacuum or gas flow, but also be used for PVD, CSS or CVD coating. Three precision temperature controllers provide 30 segments heating and cooling program with +/- 1°C accuracy independently. The vertical tube furnace is installed in a heavy-duty mobile cart for easy moving.


Furnace Structure
  • Double-layer steel structure with air cooling to keep case temperature <65°C
  • High purity fibrous alumina insulation with a Special coating to ensure max. energy saving
  • Foam ceramic blocks with alumina coating are included, which is hanged on top and bottom of flange to protect O-ring from damaged by heat radiation.
  • The wheel is installed on the split top cover.


4.8KW (30Amps circuit breaker is recommended)


AC 208-240V Single Phase, 50/60 Hz

Max. Temperature

1200°C (<1 hr) each zone

Continuous Temperature

1100°C for each zone

Max. Heating Rate

<= 20°C/min.

Temperature Accuracy

+/- 1°C

Tube Size and Materials

  • One 1200mm length quartz tube is included
  • OD: 50 mm, ID. 44 mm
  • Foam ceramic blocks with alumina coating are included, which is hanged on top of flange to protect O-ring damaged by heat radiation

Heating Zone Length

  • Heating Zone:                 Total: 530 mm  ( 135 mm +260 mm  + 135 mm )
  • Constant Temp. Zone:    ~ 400 mm within +/- 2 oC

Temperature Controller

  • MET certified 30 programmable segments for precise control of heating rate, cooling rate, and dwell time.
  • Built-in PID Auto-Tune function with overheating & broken thermocouple broken protection.
  • Over-temperature protection and alarm allow for operation without an attendant.
  • RS485 Communication Port.
  • You may upgrade the controller to Eurotherm 3000 for +/- 0.1oC accuracy
Vacuum Sealing Flange

Vacuum Level

  • 10E-2 Torr by a mechanical vacuum pump

  • 10E-5 Torr by molecular pump

  •  Leak rate < 5 mTorr / min.

Heating Element

1300°C Fe-Cr-Al Alloy doped by Mo


500mm(L) x 430mm(W) x 880mm(H) exclude mobile cart
700mm(L) x 700mm(W) x 1680mm(H) install with mobile cart

Net Weight

About 115 kg

Shipping Size

48"(L) x 40"(W) x 75''(H)

Shipping Weight

500 lbs


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

Laptop, software & WiFi Control(Optional)

  • Brand new laptop with Microsoft Windows 10 and Microsoft Office 2013 (30 days free trial) 
  • Labview Based Temperature Control System (EQ-MTS01) enables users to edit temperature profiles, manage heat-treatment recipes, record, and plot data for MTI furnaces.
  • A wireless remote control provides up to 300 meters of operating range.
  • The above features are available upon request at an extra cost (up to $1,000).
  • Note: The software is only compatible with MTI’s Yudian Temperature Controller

  • CE Certified
  • NRTL or CSA certification is available at extra cost.

Application Note ( We may help you to build customized flange to meet your application at extra cost )

  • Customers may calibrate temperature before use to obtain accurate temperature inside the tube furnace,   please click here to learn how.
  • Please click the picture below to learn how to quench sample in gas flow and vacuum
    • Approach#1: Traditional wire cut and free-falling  ( Fig. 1 & 2 )
    • Approach#2: Electromagnetic release and free-falling. (Fig 3 & 4 )
 Fig. 1     Fig. 2       Fig. 3                               
  • The furnace can be modified into an HPCVD ( hybrid physical-chemical vapor deposition ) furnace via DIY a sample susceptor ( click picture below-left to see how )
  • The furnace can be used for brazing of two flat < 1" diameter sample via top dead weight under vacuum at <1000° ( click picture below -right to see how )

Operation Video



Click here to learn more about the installation of a gas regulator.


  • The tube furnaces with quartz tube are designed for use under vacuum and low pressure <0.2 bar / 3 psi / 0.02 MPa. 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.
  • Attention: A two-stage pressure regulator must be installed on the gas cylinder to limit the pressure to below 3 PSI for safe operation. Click here to learn the installation of a gas regulator.

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