1750C max. Compact Vacuum Tube Furnace (60mm OD) - GSL-1750X-S

• 800 -1720ºC continuous
• Max: 1750ºC < 2 hour

• Double-layer steel casing with air cooling.
• Two cooling fan inside to keep case temperature < 60^oC.
• High purity Alumina refractory chamber with max energy saving.
• Alumina tube, vacuum flange, gauge & valves are included.
• Compact design (click picture on left to see dimensions)
• Such a compact space-saving furnace can be placed on the 600mm x 600mm mobile cart (available in the optional parts list below). 

• PID automatic control via SCR (Silicon Controlled Rectifier) power control with phase angle fired
• 30 programmable segments for precise control of heating rate, cooling rate and dwell time
• Please click here to learn why SCR is more accurate than SSC (Solid state relay)
• Built-in over-temperature alarm and protection allows for operation without the attendant
• +/- 1 ºC temperature accuracy
• RS485 Communication Port
• Optional:
• The furnace may be operated by PC by installing a control module. Please order an 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.

• Premier Grade alumina tube made in USA.
• 54 mm (I.D) x 60 mm (O.D) x 790 mm length.
• Four 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).
• For 60mm tubes, it is recommended that customers purchase two pairs of tube support to prevent tube from bending under high temperature (please click on the last picture to order).

• One pair sealing flange with double silicone high-temperature O-ring is included.
• Two SS needle valves and one dial vacuum gauge are installed with a flange for immediate use. 
• Vacuum pressure can reach 50 mTorr by a quality mechanical vacuum pump and 10^^-5 torr by turbo molecular pump. Please click the picture below to see flange assembling details. 

• Standard 1/4‘’ Barbed fittings with needle valves.
• For supplying high-pressure gas, you may replace the standard barbed hose fitting with the 304SS 1/4" Swagelok® Tube Fitting, please click underlined to order.
• Optional: In order to increase the throughput and achieve high vacuum, you may replace the standard barbed hose fitting with the KF25 adapter, please click the underlined to order.
• Optional: You may also consider using the parts in below to increase the vacuum efficiency 
• Please click here to order a digital vacuum gauge for precision vacuum control up to 10^-4 torr (see picture below and click to enlarge)
• You may click here to order flow meter and install in tube flange (see picture below)
• KF25 Stainless steel Bellows 
• KF25 Quick Clamps
• You may order a pressure control module ( click picture below-right ) to keep the chamber at constant pressure

• Limited by vacuum pump
• 50 mtorr can be achieved by a mechanical pump
• 10^-5 torr can be reached by molecular pump
•  The vacuum pump is not included, please order separately by clicking here

• 10 feet long 10-3 AWG heavy duty UL approved power cable is included. Extra length cable can be ordered by click picture below-left
• The plug is not included. You can order from your local hardware store according to the female plug in your lab, or order from the link below-right (30A plug)

• CE Certified
• NRTL or CSA certification is available upon request at the extra cost

Application Notes

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

• In order to obtain accurate temperature inside tube furnace, you need to perform a temperature calibration before use, please click here to learn how.
• How to set up ceramic tube and vacuum flange for MTI Tube furnace 
• Proper placement of tube blocks
• The tube furnaces with alumina tube are designed for use under vacuum and low pressure < 0.02 MPa
• Attention: A pressure regulator must be installed on your input gas tank ( click picture below to review ) and have the output gas pressure set below 3 PSI at all times after opening the gas tank with the gas maintained in a continuous flowing condition. Gas build-up with pressure levels exceeding over 3 PSI may cause irreversible damage to the furnace chamber.
• 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 unforeseeable damages.
• The flow rate for gases should be limited to < 200 SCCM ( or 200ml/min )
• Vacuum pressures may only be safely used up to 1500°C