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Dual Heating Zone 1200C Compact Split Tube Furnace with Optional 1"- 2" Tube & Flange - OTF-1200X-S-II

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Sale Price: Starting at USD$4,698.00
If you are international, please click this.
Transported by LTL Freight (Truck)

Product Options

Tube size:
OTF-1200X-S-II is a compact two-heating zone split tube furnace with a max. the working temperature of 1200°C. The furnace can adopt either a 1" or  2" O.D quartz tube (optional) with a pair of stainless steel vacuum sealing flanges. The 1/4" barb fitting for the rubber hose connection allows heating samples in a vacuum or flowing gas. The furnace has two 4" L heating zone, which can provide a 100 mm long constant temperature zone or 200°C temperature gradient. Built-in two precision temperature controllers can provide up to 30 segments of heating and cooling steps with +/- 1°C accuracy.

Furnace Structure
  • Double-layer steel structure.
  • High-purity Al2O3 fibrous insulation with Max. energy saving
  • High-purity alumina coating on refractory ceramics for longer service life.
  • Two 4" length heating zone is controlled by temperature independently.
  • Dual Heating zone design and Alumina circle block help you build customized Temperature Gradients inside the tube.
  • 110V AC, single phase, 50/60 Hz
  • 1.5 KW
Max. Temperature
1200°C (<1 hour)
Continuous Temperature
1100°C ( continuous)
Max. Heating Rate
≤ 20°C/min
Heating Zone Length
  • Two heating zone and each zone length is 100mm and 200 mm in total 
Constant Temp. Zone

Temperature Gradient
  • 50mm  within +/-1°C ( If set two zones at the same temperature )
  • 70mm  within +/-2°C  ( If set two zones at the same temperature )
  • Max. temperature gradient:  1°C/ mm ( one zone heating )
  • Max. temp difference between the adjacent zones ~100°C (heat up one zone only, without the isolator between the adjacent zones)

Temperature Controller
  • Two temperature controllers are built to control the heating zone independently via K-type thermal couples
  • PID automatic control via solid-state relay with 30 steps programmable
  • Built-in Over Temperature and Thermocouple Failure Protection
Temperature Accuracy
+/- 1°C
Heating Elements
Fe-Cr-Al Alloy doped by Mo

Tube Size

Please select the tube size in the options bar, ( click below to order spare tube )
 1" quartz tube (25mm O.D x 22mm I.D x 450mm L)
Vacuum Flanges
  • 1" flange has no thermocouple insert ( click the bottom picture to see details )
  • 2"  and 2.36"(Option) tube flange (click the bottom picture to see details)
Vacuum Level
10-2 torr by a mechanical pump and 10-4 torr by turbo pump with quartz thermal block. Please click the picture to order vac pump at the extra cost:
Rotary Vane Vacuum Pump  Compact turbopump
Fitting Ports
Optional Parts
  • You may need a vacuum valve at the vacuum port( click the picture left to order )
  • You may consider ordering a quick connecting flange at extra cost.
  • You may click the pictures in below to order the furnace with a vacuum pump and a temperature calibration kit.
Pressure Measurement & Monitoring
  • Standard mechanical vacuum gauge measures within a pressure range of -0.1 to 0.15Mpa is included.
  • OPTIONAL: A gas-type independent (above 10mbar) digital vacuum gauge with a wide range between 3.8x10-5 to 1125 Torr. Aside from greater measurement precision, this gauge reduces risks of chamber explosions caused by the incorrect reading of gas pressures due to gas-type dependency.              
With lid closed: 340mm(L) × 300mm(W) × 400mm(H) 
With lid open: 340mm(L) × 300mm(W) × 560mm(H)
Net Weight
35 Kg
Shipping Package Size
40''(L) x 25''(W) x 35''(H)
Shipping Weight
110 lbs
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.) 
  • CE Certified
  • NRTL or CSA certification is available at extra cost. 
Application Notes & Warning
Operation Video


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1. Prices listed online are valid for the US market and who pay by credit card only. There will be extra charges for shipping & handling. Prices vary from country to country.
2. We may add extra charges for paper orders and NET 30 terms due to extra labor costs.
3. The prices listed are subject to change without notice.