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1800C Three Zones Tube Furnace (60mm OD) with Vacuum Flanges & Quartz Window - GSL-1800X-60-III

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GSL-1800X-60-III is a CE certified and UL ready 60mm OD three zones tube furnace with vacuum sealing flange and 30 mm Dia. quartz window. The center heating zone is 220mm in length, the other two zones are 200mm in length and they are controlled by three precision 30 segments digital temperature controllers independently. All of three zones are heated by Kanthel-1900 grade  MoSi2 elements up to 1800°C. The tube furnace can create a various thermal gradient by adjusting three zones' temperature. It is an excellent furnace designed for studying the material 's Raman spectrum under high temperatures.  also, can be used for epitaxial film growth by CVD. SPECIFICATIONS

Furnace Structure

  • Double-layer steel case with two cooling fans which ensure low surface temperature
  • YSZ fibrous insulation is used as internal refractory
  • High purity fibrous alumina insulation is used as external refractory
  • Included vacuum flange with 30 mm quartz window. The laser beam can penetrate the furnace through the window and sapphire thermal block.


  • 15 KW max (75A air breaker required )
  • 8 KW for normal working temperature
Voltage AC 220V three phase 

Max. Temperature

  • Each zone: 1800 °C max. (< 2 hours )
  • 1750°C continuous

Thermal Block Placement

Heating Elements

14  pcs Kanthal -super-1900 grade MoSi2 heating elements installed

Normal Heating/Cooling Rate

5°C /min

Heating Zone Length

  •  Three zones: total length: 610 mm (Z1 & Z3 = 195  Z2 = 220 mm)
  • Constant temperature zone: 300 mm (if set up three zone at 1600°C)

Tube Size & Vacuum Flange

  • 99.8% purity Alumina Tube
  • 60 OD x 54 ID x 1200mm L
  • 60 mm stainless steel  water cooling vacuum sealing flange with valve and meter is included
    • special quick clamp flanges for easy installation
    • 30mm Dia x 3 mm double side polished single-crystal window installed on the flange, which allows the laser beam to go through the tube
    • In order to block heating radiation and make laser bean transparent,  Two sapphire rods with two ends polished must be placed inside furnace ( please order separately )
    • 16L/min water chiller is required for cooling flange, please click the picture -right to order separately
Temperature Control
  • Three digital controllers via SCR (Silicon Controlled Rectifier) power control with phase angle fired
  • Each controller is 30 programmable segment for precise control of heating, cooling rate and dwells time
  • Built-in PID Auto-Tune function with overheating & broken thermocouple protection
  • Over-temperature protection and alarm allows for operation without attendant(s)
  • +/- 1 ºC temperature accuracy
  • Three B-type thermocouples (one for each zone)
  • RS485 Communications Port
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.
Power Cable & Plug
  • A 10 feet length 8-3 AWG heavy duty UL approved power cable is included
  • Extra length cable can be ordered by click picture left
  • The plug is not included, but you can order from your local hardware store according to female plug in your lab.


1500 L x 550 W x 940 H, mm 

Net Weight

300 kg


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 replacement at related products below.)

Laptop, software & WiFi Control (Optional)

  • Brand new laptop with Microsoft Windows 10 and Microsoft Office 2013 (30 days free trial) 
  • Labview Based Temperature Control System (EQ-MTS01) enables users to edit temperature profiles, manage heat-treatment recipes, record, and plot data for MTI furnaces.
  • A wireless remote control provides up to 300 meters of operating range.
  • The 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


  • Please selects the certificate in the options bar:
  • CE Certificate & UL/CSA ready: CE approval, ready to pass UL/CSA certificate at extra cost
  • UL or TUV certificate -  UL approval (UL 61010), 
Operation Instructions          

Shipping Package Size After Crating

47"x45"x45"(1200L x 1150W x 1150Hmm)

Shipping Weight

400 kg

Application Notes

Optional Parts


Please click here to learn the installation of a gas regulator
  • The tube furnaces with alumina tube are designed for use under vacuum and low pressure < 0.02 Mpa
  • Never use graphite crucible in the alumina tube.
  • Attention: A two-stage pressure regulator must be installed on the gas cylinder to limit the pressure to below 3 PSI for safe operation. Click here to learn the installation of a gas regulator. 
  • The gas flow rate 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

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