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Compact 5" Split Vacuum Furnace with Separated Temp. Controller (1200C Max) - OTF-1200X-S-5

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In stock
Item Number: OTF1200XS5
Transported by LTL Freight (Truck)
OTF-1200X-S-5 is a compact and energy-saving split tube furnace with a max. working temperature of 1200°C (Since 2016.11.08) and All electric parts are UL / MET / CSA certified. The furnace adopts a 5" (130mm) O.D quartz tube with a pair of stainless steel vacuum sealing flanges. The 1/4" barb fitting for rubber hose connection allows heating samples in the vacuum or flowing gas. The built-in precision temperature controller can provide up to 30 segments of heating and cooling steps with +/- 1 °C accuracy. The furnace can anneal wafer up to 4 "diameter.   

Furnace Structure
  • Double-layer steel structure.
  • High purity Al2O3 fibrous insulation with Max. energy saving.
  • High purity alumina coating on refractory ceramics for longer service life.
  • This furnace can be modified into many special furnaces ( see the bottom application note)
3 KW
220VAC 50/60Hz
Max. Temperature
1200°C (<1 hour)
Continuous Temperature
1000°C (continuous)
Max. Heating Rate
≤ 20 °C/min
Heating Zone Length

  • 12 " (300mm), single zone.
  • Constant Temperature Zone
    • 100 mm length (+/-1ºC )( click drawing below for temp profile )
    • 140 mm length (+/-2ºC ): ( click drawing below for temp profile )
Temperature Controller

  • PID automatic control via solid-state relay with 30 steps programmable.
  • Built-in Over Temperature and Thermal-couple Failure Protection.
  • Optional: The furnace may be operated by PC with installing a control module. Please order an MTS02-B control module at extra cost. 
Advanced Temperature Controller (Optional)
  • MTS02-Y Temperature control software kit (for YD518P series controllers) + 15" laptop package is available at the options bar. Click for detail information about the MTS02-Y software kit.
  • You may upgrade the temperature controller to the Eurotherm Temperature Controller with +/-0.1 °C accuracy. This package includes a Eurotherm programmer, a communication cable (RS485 - USB) and a software CD. Click the pic left to view the full spec of the Eurotherm 
Temperature Accuracy
+/- 1°C
Heating Elements
Fe-Cr-Al Alloy doped by Mo
Tube Size
Vacuum Sealing
Left Flange     Right Flange

Optional Hinged Type Flange at extra cost

  • One pair of SS 304 vacuum flange with double high-temperature silicone O-ring is Included. (With support fixture) (click pic left for detail).
    • KF25 port is built-in the right side flange to connect a vacuum pump.
    • Vacuum gauge, inlet valve, and 1/4 thermal couple feed-through are built-in left side flange.
  • The vacuum level can reach 10-2torr (by a mechanical pump).
  • Option 1:Water cooling 5" flange with Support Fixture,  which allows the furnace to achieve1200°C (Pic 1)
  • Option 2:   Hinged type flange for easy sample loading( Pic 2-3, click pic 3 to order )
  • Option 3: optional Quartz blocks and optional Quartz Boat are easy to build clean and high-vacuum systems. 
  • Option 4: A second temperature as a monitor can be added with additional cost applied. ( Pic 4)
  •     pic 1               Pic 2 pic 3 pic 4
Fitting Ports
Optional Parts
  • You may need a vacuum valve at the vacuum port click picture left to order ).
  • You may click the pictures in below to order furnace with a vacuum pump and a temperature calibration kit.
Pressure Measurement / Monitoring
  • Standard mechanical vacuum gauge measures within a pressure range of -0.1 to 0.15Mpa is included.
  • OPTIONAL: A gas-type independent (above 10mbar) digital vacuum gauge with a wide range between 3.8x10-5 to 1125 Torr. Aside from greater measurement precision, this gauge reduces the risks of chamber explosions caused by the incorrect reading of gas pressures due to gas-type dependency.
Optional Insert-able Thermal-couple

  • A K-type insert-able thermocouple can be inserted through the flange to monitor the temperature inside the tube. Click the picture below to order
  • Heating furnace is available for spare and replacement ( click on the right picture below).
  • You may order flange support to avoid tube rotating ( click Pic below right )

  •   Click the picture to see detail.
Net Weight of Furnace
48 Kg
Shipping Weight & Dimensions
228 lbs; 48"x40"x37"
One-year limited warranty with lifetime support (Consumable parts such as processing tubes and o-rings are not covered by the warranty, please order replacements at related products below.) 
Laptop, software & WiFi Control(Optional)
  • Laptop, software & WiFi Control (Optional) with Microsoft Windows 10 and Microsoft Office 2013 (30 days free trial) for immediate use.
  • Labview Based Temperature Control System (EQ-MTS01) enables the user to edit temperature profiles, manage heat-treatment recipe, 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). 

  • CE Certified
  • NRTL or CSA certification is available upon request at the extra cost
Application Notes & Warning

  • Tube furnaces with quartz tubes are designed for use under vacuum and low pressure < 0.2 bars. 
  • 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.
  • How to set up a ceramic tube and vacuum flange for MTI tube furnaces.
  • For safety, you may consider putting the small tube furnace inside a fume hood. ( click picture left to see )
  • This furnace can be modified into the vertical,  rotation,  high-temperature ball mill and dip coating ( click picture below to see detail)
Operation Instructions

          Demo Video                                                                                              

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