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1500°C Two Zone Split Tube Furnace with Flange & Mullite Tube ( 84 mm) - OTF-1500X-II

In stock
Item Number: OTF-1500X-II
Transported by LTL Freight (Truck)


Upgrade to Eurotherm Temperature Controllers (Dual zone) + 15" Laptop + Accessories Kit
OTF-1500X-II is a split two-zone tube furnace with mullite tube and conventional flange working up to 1500°C. Two 30 segments temperature controllers are installed with S type thermal couples and  +/ - 1°C accuracy. It is an excellent furnace for exchanging processing tube for multi-purpose.  

Note: New safety feature: An interlock system has been integrated into the furnace structure since June.2015

Power Input 6KW
Working Voltage  AC220V Single phase 50/60Hz ( 40 A breaker required)
 Working Temperature 1500°C Max. for short time
1400°C  Continuously
Recommend Heating rate 5°C/min.
Processing Tube
  • Material:  Mullite ceramic made in USA
  • Size: 84 O.D x 73 I.D x 1000mm L
  • Stainless steel vacuum sealing flange with valve and meter is included
  • Thermal block is included . See picture below middle for details
  • You may order flange support to avoid tube rotating ( click picture below right )

    click here to order spare       

Heat Zone Length
  • Two heating zones:  200 mm / each  ( included 20 mm spacing )
  • Total zone length:  390 mm  
  • Constant Temperature Zone length:   200mm  ( if set 2 zone at same temperature ) +/- 2ºC.
  • Accept processing tube up to 100 mm diameter

Temp. Profile at 1400ºC
(click to enlarge)
Overall Dimensions 760 mmL × 380 mmW × 680 mmH
Temperature Controllers
  • PID automatic control with 30 programmable segments for precise control of heating rate, cooling rate and dwell time.
  • Built-in overheating & broken thermocouple protection.
  • Over temperature protection and alarm allows for operation without attendant(s).
  • +/- 1 ºC temperature accuracy.
  • Two S type thermocouples (one for each zone).
  • RS485 Communications Port.
  • Optional:  
    • The furnace may be operated by PC by installing a control module. Please order an MTS-02 control module at extra cost. 
    • If you order the PC control module together with the furnace, we will install and test it before shipping. We recommend you to order a computer laptop from us to avoid software installation problems. For more information please click here.
Vacuum Level
  • 10E-2 torr by quality mechanical vacuum pump
  • 10-5 torr by molecular pump
Heating Elements & Thermal couples
  • 16 pcs  1500ºC grade Silicon carbide rod  ( 14mm Dia. x 150mm heating  x  413mm length), which is consumable, not covered by warranty. Please click picture below left to order spare and replacement
  • 2 pcs S type thermal couple built in
Net Weight 100 Kg

Application Notes

Click here to learn more about the installation of a gas regulator.
  • The tube furnaces with mullite tube are designed for using under vacuum and low pressure < 0.02 Mpa / 0.2 Bar/ 3 PSI. Vacuum pressures may only be safely used up to 1300°C. The flow rate for gases should be limited to < 200 SCCM ( or 200ml/min) for reducing thermal shock to the tube.
  • Never use graphite crucible in alumina 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.
  • Never heat the furnace while the gas release valve is closed and a positive pressure condition exists within the furnace chamber. The pressure gauge must be used to closely monitor the chamber condition at all times during the heating process; please open the gas release valve immediately once the chamber pressure has reached over 3 PSI to prevent unforeseeable damages.

  • 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.).  
  • ATTENTION: Any damages caused by the use of corrosive and acidic gases are not under the coverage of MTI One Year Limited Warranty.

  • CE Certified
  • All electric components ( >24V) are UL / MET / CSA certified
  • The furnace is ready to  pass TUV(UL61010) or CSA certification at extra cost. ( please click marks below to learn details )
Operation Instructions       

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1. Prices listed online are valid for US market and whom 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 cost.
3. The prices listed are subject to change without notice.