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1700°C Split Tube Furnace with Vacuum Flanges & Valves, Optional 60 - 100mm Tube - OTF-1700X-UL

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Transported by LTL Freight (Truck)

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furnace size:


Upgrade to Eurotherm Temp Programmer (single zone) Upgrade + 15" Laptop + Accessories Kit
OTF-1700X-UL series are UL/TUV standard split-able alumina tube furnaces with MoSi2 Heating Elements. The furnace can accomodate 60 or 80mm O.D high-quality alumina tubes along with a pair of smart stainless steel vacuum sealing flanges that features needle valves and vacuum gauge. Such configuration allows sample heat treatment under vacuum or flowing gas conditions up to 1700°C. The precise temperature controller can provide 30 segments of heating and cooling with +/- 1°C accuracy.  

OTF-1700X-80 OTF-1700X-100

 Alumina Tube
 Alumina Tubes
(click underlined for specs)
O.D: 80 x I.D:74 mm x L 1000 mm
(click underlined for specs)
O.D: 101 x I.D:90 mm x L 1000 mm
(click underlined for specs)
Furnace Structure
  • Splitable Design provides easy access to the tube replacement
  • Double layer steel casing with air cooling to ensure a low surface temperature < 60°C.  
  • High purity fibrous alumina insulation for Max. energy saving.
  • The special refractory coating on the furnace liner and heating element to increase furnace life.
  • Two sets of fibrous ceramic tube blocks are included for blocking heat radiation from inside the tube. (Ceramic blocks must be fully inserted into the furnace chamber before heating)  
Input Voltage
 208 - 240VAC SINGLE PHASE, 50/60Hz
 7 KW (40A Breaker)
Heating Temperatures
  • Max. heating temperature: 1700°C, < 10 minutes (N2 or other inert gas must be filled inside the tube to resist deformation)
  • Continuously working temperature: 1500°C (1600°C < 1hr)
  • Heating rate: 10°C /min Max.
Heating Zone
  • Total heating zone length: 400mm
  • Constant temperature zone: 140mm (+/-1°C)
Heating Elements
  • 16 pcs MoSi2 1800 grade Heating Element.
Temperature Controller

Temperature controller interface

Optional PC control module

Optional Eurotherm 3204 
Standard 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 (PC control module and software are sold separately. See optional.

  • MTS-02 PC control module (also including cable and software) is an add-on option for PC control.
    • It is recommended to purchase the module together with the furnace. We install and test it before shipping. 
    • It is recommended to purchase the laptop (with software pre-installed) from us to avoid software confliction.
    • Please note the module is not sold solely in the future.
  • Eurotherm 3204 Temperature Controller is optional for additional $950 including installation and testing. This package also includes the communication cable (RS485 - USB) and software CD. Click here to view the full spec.
Vacuum Sealing
  • Two stainless steel flanges with vacuum gauge and valves. 1/4" pipe  and KF25 adaptersare installed in two ends respectively.
  • For fast & better vacuum, suggest you use stainless steel pipe ( click to order at extra cost ) , as well as digital vacuum gauge. 
  •  Two pairs of 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)
    Vacuum Levels
    • 10^-2 torr by mechanical vacuum pump.
    • 10^-5 torr by molecular pump.
    • Leak rate < 5 mtorr / min.
     Vacuum pump is not included, please order separately at related products section
    Product Dimensions       1000 L × 610 W × 750 H  mm
    Net Weight
    150 Kg
    Shipping Dimensions
    50 x 30 x 35 inch
    Shipping Weight
    450 lbs
    One year limited manufacturer's warranty (consumable parts such as processing tubes, O-rings and heating elements 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. 
    •                   (click mark to learn what is )
    Application Notes

    Click here to learn more about the installation of a gas regulator

    • NEVER open the furnace lid at temperature >100°C, doing so may thermoshock the processing tube and cause cracks. 
    • The tube furnaces with alumina tube are designed for using under vacuum and low pressure < 0.02 MPa / 0.2 Bar/ 3 PSI 
    • Never use graphite crucible in alumina tube.
    • Attention: A two stage pressure regulator must be installed on gas cylinder to limit the-the pressure to below 3 PSI for safe operation. Click here to learn the installation of a gas regulator. 
    • Never heat the furnace while the gas release valve is closed and a positive pressure condition exists within the furnace chamber. The pressure gauge must be used to closely monitor the chamber condition at all times during the heating process; please open the gas release valve immediately once the chamber pressure has reached over 3 PSI to prevent unforseeable damages.
    • .The flow rate for gases should be limited to < 200 SCCM ( or 200ml/min )
    • Vacuum limit definition for all alumina tube furnaces: * Vacuum pressures may only be safely used up to 1500°C
    Operation Instructions  ( Heating elemen instalation )     


    OTF-1700X-60 OTF-1700-80 OTF-1700X-100
    Alumina Foam Block for tube furnace 1 pair

    EQ-F-T-block-52 EQ-F-T-block-70 EQ-F-T-block-92
    Vacuum flanges
    1 pair

    EQ-FL-60 EQ-FL-80 EQ-FL-101-KF25
    3 Alumina tubing 1 unit    Alumina Tubes EQ-TA-60D-M1000 EQ-TA-80D-M1000


    Part No.
    Quick Link
    KF-D25 series Vacuum Suite(vacuum pump, vacuum ball valve, vacuum bellows, quick clamps, KF adapter) Also you may buy individually.
    EQ-MTS02 Computerized temperature Control System
    Compact Digital Vacuum Gauge & Controller with Power Supply (Up to 10-4 Torr)
    High vacuum station (Mechanical pump + turbo molecular pump.)
    Gas mix station (Float flow meter / Mass flow meter) (2, 3, 4channels selectable)
    Compact Flow Meter (float flow meter / mass flow meter)
    Quartz tube block /heat insulating tube block
    Quartz Boats /curcible /container /sample holder
    Heavy Duty Mobile Car for All MTI Tube and Box Furnaces
    Vacuum flange fittings and assembly

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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.