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Two Zones (1100C) Split Vertical Tube Furnace w/ 4" Quartz Tube & Vacuum Flanges - OTF-1200X-VT-II-100

In stock
Item Number: OTF1200XIIVT4
Transported by LTL Freight (Truck)


Upgrade to Eurotherm Temp Controllers (Dual )

OTF-1200X-VT-II-100 is Two Heating Zone Split Vertical Tube Furnace with vacuum-sealed 100mm diameter quartz tube. It can not only achieve faster sample heating and quenching in vacuum or gas flow but also be used for PVD, CSS, or CVD coating. Two 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 ( click picture below for details)


6KW (total) / each zone: 3KW


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 1000mm length quartz tube is included
  • OD: 100 mm, ID. 95 mm
  • Foam ceramic blocks with alumina coating are included, which is hanged on top of flange to protect O-ring damaged by heat radiation
  • Upgrade note:  Processing tube can be replaced by mullite tube from 60 mm OD to 100 mm OD at extra cost, then furnace can be used up to 1250°C )

Heating Zone Length

  • Two heating zones:  200mm + 200 mm  , total 400mm
  • Constant temperature zone: 300 mm (+/-1°C) if two heating zones are at the same temperature

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 attendant(s).
  • RS485 Communication Port.
  • The controller may be upgraded to Eurotherm 3000 with +/- 0.1 oC 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


550mm(L) x 380mm(W) x 520mm(H) exclude mobile cart
600mm(L) x 600mm(W) 1200mm(H) install with mobile cart

Net Weight

About 80 kg (excluding mobile cart)

Shipping Size

48"(L) x 40"(W) x 72''(H)

Shipping Weight

400 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. ( please click marks below to learn details )

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 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    Fig. 4                                                       
  • 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 the picture below -right to see how )
  • 3 Zone heating  Zone vertical furnace is available using this furnace ( Pic right below) 

Operation Video



Click here to learn more about the installation of a gas regulator.
  • The tube furnaces with quartz tubes are designed for use under vacuum and low pressure <0.2 bars / 3 psi / 0.02 MPa. Vacuum pressures may only be safely used up to 1000°C. The flow rate for gasses 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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1. Prices listed online are valid for the US market and who pay by credit card only. There will be extra charges for shipping & handling. Price various from country to country.
2. We may add extra charges for paper order and net30 terms due to extra labor costs.
3. The prices listed are subject to change without notice.