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Compact Auto-Sliding Tube Furnace (2"OD, 1200C max.) for Fast Heating / Cooling - OTF-1200X-50-SL

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OTF-1200X-50-SL is a compact automatic sliding tube furnace with 2" OD x 36" L Quartz tube and flanges with 1200°C max. working temperature. The automatic sliding mechanism allows the furnace to slide from one side to the other for achieving the max. heating and cooling rates of > 100°C/min. 
For achieving the fastest heating, the furnace may be pre-heated to the desired temperature and then get slid to the sample's position. As for the fastest cooling, the furnace can be slid to another side after sample heating is completed. Moreover, the heating and cooling rates may reach 15°C/s under vacuum or inert gas conditions. This furnace provides an alternative for rapid thermal processing at the lowest cost. 


Furnace Structure

  • Double-layer steel structure with dual air cooling fans 
  • One pair of sliding rails is installed on the bottom of the furnace, which allows the furnace to be manually  moved from side to side
  • Vacuum flanges and a vacuum gauge are installed for immediate use.


1.5 KW
Voltage Furnace: AC 208V~240V Single Phase, 50/60 Hz
Sliding Mechanism: AC 208V~240V Single Phase, 50/60 Hz

Max. Temperature

1200°C (<1 hour) with flowing gas

Continuous Temperature


Heating& Cooling Rates

  Heating Rate:
 15°C/sec (RT - 150°C);
 10°C/sec (150°C - 250°C);
  7°C/sec (250°C - 350°C);
  4°C/sec (350°C - 500°C);
  3°C/sec (500°C - 550°C);
  2°C/sec (550°C - 650°C);
1°C/sec (650°C - 800°C);
0.5°C/sec (800°C - 1000°C);
Cooling Rate:
15°C/sec (1000 - 950°C);
10°C/sec (950°C - 900°C);
7°C/sec (900°C - 850°C);
4°C/sec (850°C - 750°C);
2°C/sec (750°C - 600°C);
1.5°C/sec (600°C - 500°C);
1°C/sec (500°C - 400°C);
0.5°C/sec (400°C - 300°C);
Note: The max heating and cooling rate is achieved by pre-heat one side of the processing tube to the target temperature and then slide the furnace to the other side. You may choose to place the sample in the pre-heat area or not.

Heating Zone Length

8" (200mm), single zone. The following picture shows the temp. distribution across the heating zone.

Constant Temperature Zone

2.3" (60mm)  (+/-1°C) @ 1000 °C

Heating Elements

Fe-Cr-Al Alloy doped by Mo

Processing Tube

Temperature Controller
& Sliding Control

  • 30 programmable segments for precise control of heating rate, cooling rate, and dwell time.
  • Built-in over-temperature alarm and protection allow for operation without an attendant.
  • A k-type thermal couple is built in the furnace to control the furnace temperature
  • Sliding is driven by an electric motor by touch button          

Temperature Accuracy

  • +/ - 1°C

Vacuum Flanges

  • Vacuum sealed flange with  SS needle valves and vacuum gauge is  included for immediate use
  • Option: Vacuum Sealing Assembly for 50 mm Dia Tube Furnace with KF-25 Vacuum Port & 1/4 Feedthrough with Digital Gauge is available with an extra cost 

  Vacuum Level 

  • Limited by the pump ( pump is not included, click on pictures to order )
    • 10E-5 torr can be reached by turbopump
    • 10E-2 torr by a mechanical pump.

 Sliding Rails / Table

  • Double sliding rail made by Cr-plated steel

  • Sliding length: 1200 mm


  • 1200L x 400 W x  500 H, mm

 Net Weight

90 kg

Shipping Package Size

51" x 40"x 36"

Shipping Weight

230 lbs


One-year limited manufacturer's warranty (Consumable parts such as processing tubes, O-rings, and heating elements are not covered by the warranty, please order replacements at related products below).

Laptop, software & WiFi Control(Optional)

  • Brand new laptop 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 profile, 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). 
  • Note:  The software is only compatible with MTI’s Yudian Temperature Controller


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

Application Notes

Click here to learn the installation of a gas regulator

  • Tube furnaces with quartz tubes are designed for use under vacuum and low pressure < 0.2 bars / 3 psi
  • 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.
  • The flow rate for gasses should be limited to < 200 SCCM for reducing thermal shocks to the tube
  • Vacuum limit definition for all quartz tube furnaces: * Vacuum pressures may only be safely used up to 1000°C
  • Click here to learn How to set up quartz/ ceramic tube and vacuum flange for MTI Tube Furnace.
  • If you need faster cooling please click the picture below to order a  Portable Spot Air Cooling Conditioner.
  • For Horizontaldirectional crystallization  (HDC), you may use gas feedthrough as pic 2
  • The furnace can be upgraded to 2 zone heating at an extra cost.(Pic. 3)
  • Pic. 1         Pic. 2Pic. 3


  • Fast sample cooling can be achieved by sliding the heating chamber away. Please wear protective gears such as heat resistant suit & gloves if you intend to do so. 

Operation Instructions

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