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18"L 3-Zone Split Tube Furnace w/ Optional Quartz Tube & Flange (60, 80 or 100 mm) - OTF-1200X-III-C-UL

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OTF-1200X-III-C-UL is UL ready and CE certified 18" Long ( 6"+6"+6")  split-able compact three-zone tube furnace with quartz tube (size selectable 60, 80 or 100 mm) and flange. Three 30 segments temperature controllers are installed with K-type thermal couples. Microprocessor-based self-tuning PID provides excellent control with no overshooting and  +/- 1 °C accuracy. It is an excellent furnace for sample annealing, diffusion and sintering in a various gas atmosphere up to 1200°C. (Please select the tube size in the options bar to view the price and model.)
UL Ready version was updated on July 27th, 2016. SPECIFICATIONS:
Furnace structure
  • Double layer steel case with two cooling fans which ensure low surface temperature;
  • Energy saving high purity fibrous alumina insulation; 
  • Two fibrous ceramic tube blocks are included ( if order tube) for blocking heat radiation from inside of the tube. (Ceramic blocks must be fully inserted into the furnace chamber before heating).
  • Cooling fan in two ends for cooling flange and create a larger temperature gradient.
  • Split cover with Interlock protectioncut the power if door open during furnace heating process.
Rated voltage AC 208-240V Single Phase, 50/60 Hz (40A breaker required; Powder cord is included without plug)
Power consumption 4  KW Max.
Heating elements Fe-Cr-Al Alloy doped by Mo
Heating zone length
  • Three zones: 450 mm (18") in total
  • Z1 - Z2 - Z3:152.4mm (6") + 152.4mm (6") + 152.4mm (6")
  • +/-1ºC Constant Temperature Zone: 200 mm length
  • Max. temperature gradient  ~100 oC/cm at central 1200°C
Fused Quartz Tube 
(one tube with flange included , Pls choose  from product option) )
Model: OTF-1200X-III-C-60
60 O.D x 55 I.D x 1000 L  (mm)
Model: OTF-1200X-III-C-80
80 O.D x 72 I.D x 1000 L (mm)
Model: OTF-1200X-III-C-100
100 O.D x 92 I.D x 1000 L (mm)
Warning: The tube furnaces with quartz tube are designed for using under vacuum and low pressure < 0.12 MPa (absolute pressure
Heating temperature
  • Max. Heating Temperature: 1200°C at flowing gas 
  • Continuous Heating Temperature: 1100°C  at flowing gas 
  • Max. Heating temperature at Vaccum 1000°C 
  • Max. Heating Rate: 20°C/min
Temperature Controllers 
  • Three MTE certified Temperature controller with 30 programmable segments 
  • Built in PID Auto-Tune function with overheating & broken thermocouple protection.
  • Over temperature protection and alarm allow for operation without the attendant.
  • +/- 1 ºC temperature accuracy.
  • Three K-type thermocouples (one for each zone).
  • RS485 Communications Port.
  • Optional:  
    • The furnace may be operated by PC by installing a control module. Pls order a MTS-02 control module at extra cost. 
    • If you order the PC control module together with the furnace, we will install and test it before shipping. We recommend you to order a computer laptop from us to avoid software installation problems. For more information please click here.
European Temperature Controllers (optional upgrade)
  • 1 heating channel
  • 1 program of 8 or 24 segment
  • Alarm Relay: Form 'A' and Form ‘C’ built-in 
  • Digital Communications: RS485
  • Temperature Accuracy:  ±  0.1ºC
  • Recipes: Using a PC tool recipes can be created that can be used to change the operating parameters of the 3000 simply by selecting a new recipe via the HMI. This is very useful where multiple products are processed using the same controller but require different parameters to be set.
Vacuum Flange and Gauge
    • One pair of SS 304 vacuum flange with double high-temperature silicone O-ring  is Included
    • 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 the picture to see details )
    • One Vacuum/ pressure gauges are installed one side flange
    • Vacuum level can reach 10E-2 torr by the quality mechanical vacuum pump and 10E-5 torr by the turbo pump
    • Optional: You may order digital molecular pump for  faster and better vacuum
    • You may order flange support to avoid tube rotating ( click Pic below right )
Dimensions 635mm(L) x385mm(W) x 545 mm(H)
Net Weight ~45  kg
Shipping Weight 340lbs
Warranty One year limited warranty with lifetime support. (Consumable parts such as processing tubes, o-rings, and heating elements are not covered by the warranty, please order the replacements at related products below.)
Laptop, software & WiFi Control(Optional)
  • Brand new laptop with Microsoft Window 10 and Microsoft Office 2013 (30 days free trial) for immediate use.
  • Labview Based Temperature Control System (EQ-MTS01) enables 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 operating range.
  • 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 or CSA certification is available upon request at extra cost. ( please click marks below to learn details )
Application Notes
Operation Instructions    

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