UL Standard 1200°C Split Tube Furnace with Vacuum Flanges & Optional Quartz Tube 60, 70, 80 or 100 mm O.D -OTF-1200X-UL

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Product Number: OTF-1200X-UL


OTF-1200X-UL furnace is configured to meet UL/CSA certificate standard. The furnace can adopt a 60, 70, 80 or 100mm O.D quartz tube and a pair of stainless steel vacuum sealing flanges with needle valves & gauge allow heating samples under vacuum or gas flow conditions. The temperature of this tube furnace is controlled by a high precision digital controller which provides 30 programmable segments with +/- 1°C accuracy. The maximum working temperature is 1200°C.  


Furnace Structure
  • Double layer steel casing with air cooling keeps furnace surface temperature lower than 60°C.  
  • High purity fibrous alumina insulation for maximum energy saving.
  • Special refractory coating on liner and heating element to increase furnace life.
  • All electric components are UL or Met recognized and ready to pass any safety test worldwide
Power 3KW
Input Voltage 208 - 240VAC SINGLE PHASE, 50/60Hz

Heating Temperature
  • Max. heating temperature: 1200°C (N2 or other inert gas must be filled inside the tube to resist deformation)
  • Continuously heating temperature: 1100°C
  • Heating rate: 20°C /min Max.
Heating Zone
  • Total heating zone length: 440mm (~ 18")
  • Constant temperature zone: 150mm (+/1°C)

Temperature Distribution
Please click the image below to view the hot zone temperature distribution at 980°C.

Temperature Controller
  • MET recognized 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 allows for operation without attendant(s).
  • +/- 1 ºC temperature accuracy.
  • RS485 Communications Port.
  • Communication Chip & Software is inclued for PC control operation
  • The new version of PC module is now compatible with Lab View 05/08/2014
Heating Elements Fe-Cr-Al Alloy doped by Moto :
Fused Quartz Tube Size OTF-1200X-60
60 O.D x 55 I.D x 1000 mm L
70 O.D x 65 I.D x 1000 mm L
80 O.D x 74 I.D x 1000mm L
101 O.D x 92 I.D x 1000mm L

Vacuum Sealing

  • One pair of SS 304 vacuum flange with double high temperature silicone O-ring is Included. Left flange is built in 1/4" OD thermal feedthrough port for temperature calibration at easy ( click PiC, below left-2 for detail)
  • Two needle valves are installed on flanges.
  • Default flange with 1/4'' Bard fittings, 1/4'' tube feedthrough port (for 1/4" O.D thermocouple insert) and a KF25 vacuum portclick bottom left picture to see details )
  • One vacuum/ pressure gauge is installed on one side of flange. ( see Pic below left )
  • Vacuum level can reach 10E-2 torr by quality mechanical vacuum pump and 10-5 torr by molecular 
Note: The standard vacuum flange for 70mm O.D tube doesn't have KF-25 port or thermocouple feedthrough. Click there to see detail pic.  

Refractory Blocks
  • Two fiberous ceramic tube blocks are included for blocking heat radiation from inside tube. (Ceramic blocks must be fully inserted into the furnace chamber before heating)
  • Quartz blocks (optional) are ideal for cleaner processing enviroment and higher vacuum efficiency.
Product Dimensions Furnace: 590mm(L) ×380mm(W) × 520mm(H)
Net Weight
Shipping Dimensions 45"(L) x 45"(W) x 35"(H) 
Shipping Weight 200lbs
Warranty One year limited warranty with lifetime support (Consumable parts such as processing tubes, O-rings are not covered by the warranty, please order replacements at related products below.)
Compliance Please select the certificate in option bar:
CE Certificate & UL/CSA ready: CE approval, ready to pass UL/CSA certifcate 

UL certircate -  UL apprval (UL 61010), at extra cost
Application Notes

Click here to learn the installation of a gas regulator
  • Tube furnaces with quartz tubes are designed for using under vacuum and low pressure < 0.2 bar / 3 psi / 0.02 MPa. Vacuum pressures may only be safely used up to 1000°CThe 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 gas cylinder to limit the pressure to below 3 PSI for safe operation. Click here to learn the installation of a gas regulator.
  • Heating module is consumable.  Please click picture below-right to order replacement.
  • The furnace with Sliding flange is vailable 
Operation Instructions & Video

Click here to learn How to set up quartz/ ceramic tube and vacuum flange for MTI Tube furnace. ( also click picture left to see demo video )




PREMIER SOLUTIONS PTE LTD / MTI CORPORATION - UL Standard 1200°C Split Tube Furnace with Vacuum Flanges & Optional Quartz Tube 60, 70, 80 or 100 mm O.D -OTF-1200X-UL

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