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Dual Heating Zone 1200°C 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 and voltage:
OTF-1200X-S-II is a UL certifiable compact two heating zone split tube furnace with a max. 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 rubber hose connection allows heating sample in a vacuum or flowing gas. The furnace has two 4" L heating zone, which can provide 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 which can be controlled by temperature independently.
  • Dual Heating zone design and Alumina circle block help you build customized Temperature Gradient inside the tube.
  • All electric components (>24V) are UL certified and ready to pass TUV, CSA, and UL test
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 same temperature )
  • 70mm  within +/-2°C  ( If set two zones at 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 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 bottom right picture to see details )
  • 2"  and 2.36"(Option) tube flange with 1/4'' Bard fittings, 1/4'' tube feedthrough port (for 1/4" O.D thermocouple insert) and a KF25 vacuum port(click bottom left picture to see details)
Vacuum Level
10-3torr (by mechanical pump)
Fitting Ports
Optional Parts
  • You may need a vacuum valve at the vacuum portend ( click picture left to order )
  • You may consider ordering  quick connecting flange at extra cost.
  • You may click the pictures in below to order 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 30''(W) x 33''(H)
Shipping Weight
100 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
  • All electric components ( >24V) are UL / MET / CSA certified
  • The furnace is ready to pass TUV(UL61010) or CSA certification at extra cost. (Pls click marks below to learn details )
  • Please choose certification type from product option bar
Application Notes & Warning


Operation Instructions


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1. Prices listed online are valid for US market and whom pay by credit card only. There will be extra charges for shipping & handling. Price various from country to country.
2. We may add extra charges for paper order and net30 terms due to extra labor cost.
3. The prices listed are subject to change without notice.