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1200C Split Tube Furnace (18" heating zone) with Optional Quartz Tube Size & Flange - OTF-1200X series

Transported by LTL Freight (Truck)

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UL/CSA Certification:
furnace size:
OTF-1200X-UL furnace is configurated to meet UL/CSA certificate standards. The furnace can adopt a 60, 75, 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 max. working temperature is 1200°C

Furnace Structure

  • A double-layer steel casing with air cooling keeps furnace surface temperature lower than 60°C.  
  • High purity fibrous alumina insulation for maximum energy saving.
  • The special refractory coating on the liner and heating element increases furnace life.
  • Split cover with Interlock protectioncut the power if the door opens during furnace heating process.
Voltage and Power
  • Input voltage 208 - 240VAC Single Phase, 50/60Hz
    3KW, Circuit breaker 20A

Heating Temperature
  • Fe-Cr-Al Alloy doped by Mo
  • Max. heating temperature: 1200°C ( inert gas must be filled inside the tube to resist deformation)
  • Vacuum heating temperature: 1000°C under vacuum
  • Heating rate: 20°C /min Max
  • Thermocouple: K type 220mm (8.7") Length with Ceramic Sheath, please click the link to order spare.
Heating Zone
  • Total heating zone length: 440mm (~ 18")
  • Constant temperature zone: 150mm (+/2°C)
  • Please click the image below to view the temperature distribution at 980°C.
Temperature Controller

  • Proportional–integral–derivative control (PID control) and auto-tune function
  • 30 segments programmed with ramping, cooling, and dwelling steps
  • Built-in over-temperature alarm and thermocouple failure alarm
  • +/- 1 ºC temperature control accuracy
  • Default DB9 PC communication port
  • The software for PC software is included
Temperature controller (optional)

  • The temperature controller can be graded to the Eurotherm 3000 Temperature Controller with +/- 0.1°C accuracies.  This package includes a Eurotherm 3004 programmer, a communication cable (RS485 - USB), and a software CD. Click the pic below to view the full specs
Fused Quartz Tube Size OTF-1200X-60
60 O.Dx55 I.Dx1000 mm L
76 O.Dx70 I.Dx1000 mm L
80 O.Dx74 I.Dx1000mm L
101 O.Dx92 I.Dx 1000mm L
Refractory Blocks
  • Two fibrous ceramic tube blocks are included for blocking heat radiation from the inside tube. (Ceramic blocks must be fully inserted into the furnace chamber before heating)
  • Quartz blocks (optional) are ideal for cleaner processing and higher vacuum efficiency.
  • You may order flange support to avoid tube rotating ( click Pic below right )

Vacuum Flange

  • One pair of SS 304 vacuum flange is included
  • Left flange:
    • one thermal feedthrough (for 1/4O.D sheathed thermocouple)
    • one needle valve
    • one mechanical vacuum gauge -0.1Mpa to 0.15Mpa
    • one barb fitting ( click PiC, below left-2 for detail)
  • Right flange:
    • one KF-25 vacuum port and one needle valve.
  • Optional
  • An anti-Corrosive gas-type independent (above 10mbar) digital vacuum gauge with a wide range between 3.8x10-5 to 1125 Torr is optional. 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.
  • The flange with quartz window is available for in-situ Raman or Mossbauer analysis
Vacuum Pressure
  • 10E-2 torr by a quality mechanical vacuum pump 
  • 10E-5 torr by the turbopump.
  • The vacuum pump is optional. Please click here to choose a vacuum pump. 
Product Dimensions
 600mm(L) ×440mm(W) × 550mm(H)
Net Weight
Shipping Dimensions 45"(L) x 45"(W) x 42"(H) 
Shipping Weight 200lbs
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.)
  • CE Certificate
  • NRTL or CSA certification is available upon request and at an 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 / 0.02 MPa. Vacuum pressures may only be safely used up to 1000°CThe flow rate for gasses should be limited to<200 SCCM (or 200ml/min)
  • The heating module is consumable.  Please click picture 1cto order a replacement.
  • The automatic vacuum-sealed sliding device is available for fast heating and cooling  ( Pic. 2)
  •    Pic. 1Pic. 2
Operation Video
Click here to learn How to set up a quartz/ ceramic tube and vacuum flange for an MTI Tube furnace. ( also, click the picture left to see the demo video )


OTF-1200X-75 OTF-1200X-80 OTF-1200X-100
Alumina foam block for tube furnace 1 pair
EQ-F-T-block-52 EQ-F-T-block-65 EQ-F-T-block-70 EQ-F-T-block-92
Vacuum flanges
1 pair
EQ-FL-60KF25-FT EQ-FL-76 EQ-FL-80KF25-FT
Fused quartz tubing
1 unit
EQ-QZTube-60G-1000 EQ-QZTube-75D
EQ-QZTube-80D40 EQ-QZTube-100

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