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1500C Atmosphere Controlled Quenching Furnace with 82 mm OD Mullite Tube - OTF-1500X-80-VTQ

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OTF-1500X-80-VTQ is a split vertical quenching tube furnace with an 82 mm OD mullite tube, which is designed for quenching samples from high temperatures ( Max. 1500°C) into ice water bath or quenching oil to study material phase transitions and microstructures.
It is also compatible with air-senstive samples to heat and quench in an oxygen and water free environment with MTI gas purification and circulation system (as shown in the main image). 
(Auto electromagnetic sample hanger is added since 07/21/2016)    (Manual gate valve was upgraded to an electric one since 6/26/2017 )


Furnace Structure
  • Dual layer steel furnace case with air cooling to keep case surface temperature < 65°C.

  • Vertical and splittable for easy installation of tube and flanges.

  • Atmosphere-controlled heating treatment with a 82 mm OD mullite tube.

  • Easy quenching control. Simply open the gate valve and let the sample drop directly into the quenching tank by releasing the electromagnetic sample hanger.


  • 208-240VAC, Single Phase, 50/60 Hz

  • 6 KW (40A power outlet is required)

Heating Temperature

  • 1500oC < 30 minutes

  • 1400oC < continuous

Max. Heating Rate

  • ≤ 10oC /min

Heating Element

  • 1500°C grade SiC---12 pcs

Processing Tube

  • Materials:    Mullite tube made in the USA

  • Size:           OD:82 mm x ID 73:mm x Length: 1000 mm (included)

Heating Zone

  • Heating Zone length:            440 mm 

  • Constant Temperature:       150 mm ( within+/- 1oC)

Temperature Controllers
  • 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).

  • +/- 1 ºC temperature accuracy.

  • One S-type thermocouples.

  • RS-485 Communications Port.

  • PC controlled software and interface module are optional. (Standard ModBUS protocol, written by Labview). 

  • MTS02-Y Temperature control software kit (for YD518P series controllers) + 15" laptop package is available at the options bar. Click for detailed information about the MTS02-Y software kit. 



Temp. controller (optional)

  • Upgrade the temperature controller to the Eurotherm 3000 series Temperature Controller which is fully compatible with LabVIEW. This package includes a Eurotherm 3000 series programmer, a communication cable (RS485 - USB) and a software CD. 

Water-Cooled Flanges

  • Both top and bottom flanges have water-cooling jacket (See left picture), which cools and preserves the O-ring sealings on the flange during high-temperature operation

  • Please click the picture below to order water chiller at an extra cost

Gas Purification and Circulation (Optional)

  • EQ-RMP-1 is an automatic moisture and oxygen purification and circulation system, which can provide a working environment with moisture and oxygen concentration < 1 ppm for MTI's furnaces and glove boxes. 

  • Contains 1 column of BASF antioxidant and UOP moisture absorbent.

  • Automatic pressure control system keeps the pressure at a constant range

  • 6" color touch screen allows user-friendly control and dispaly of the status of humidity and pressure level

  • Oxygen sensor and moisture sensors are included.

Hermetic Quenching Tank (Optional)

  • Hermetic quenching tank is optional for air-sensitive materials, which enables the entire quenching process under atmosphere control

  • Please contact MTI for further inquires. 



  • <0.05  torr (by a mechanical vacuum pump)

  • Vauum pump is not included. Please click the picture below to order a vacuum pump separately


Power Cable & Plug

  • 10 feet length 10-3 AWG heavy duty UL approved power cable is included. Extra length of power cable can be ordered. 

  • The plug is not included. Browse our catalog for compatible plugs or obtain one from a local hardware store. 



   1040 L × 510 W × 1900 H   ( mm )   

Net Weight

  • About 85 kg (excluding mobile cart)

Shipping Weight & Dimensions

  • Two Pallets

  • 600 lbs, 48"x40"x76"

  • 200 lbs, 48"x40"x27" 


  • One-year limited warranty (Consumable parts such as heating elements, 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) for immediate use.
  • Labview Based Temperature Control System (EQ-MTS01) enables a 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). Please contact us for more information.
  • Note: The software is only compatible with MTI’s Yudian Temperature Controller


  • CE Certified

  • NRTL certification (UL61010)  or CSA certification is available upon request at extra cost.

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

Operation Video


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