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1500°C Max Tube Furnace (50mm OD) with Sliding Flanges for Fast Heating/Cooling - GSL-1500X-RTP50

In stock
Item Number: GSL-1500X-RTP50
Transported by LTL Freight (Truck)


GSL-1500X-50RTP is a CE certified slideable tube furnace that utilizes 50 mm OD x 44mm ID x304.8 mm (12") L  mullite or quartz tubes (one end closed). The maximum working temperature of this furnace is 1500ºC.  A sliding rail is installed on right side of the flange for manually moving it from one side to the other, which allows it to achieve fast heating and cooling up to 1500 oC.  For the fastest heating, you can insert a mullite processing tube into the pre-heated furnace at the desired temperature. For the fast cooling, you can remove the tube from the hot furnace chamber and use forced air cooling. The heating and cooling rates can be much higher under vacuum or inert gasses. It is an ideal furnace for rapid thermal processing at the lowest cost.


Furnace Structure
  • One sliding flange is installed on right side furnace, which can move processing tube in & out easily.
  • Vacuum flanges can reach 10E-5 torr by molecular pump or 10E-3 torr by a mechanical pump.  The flange has a 1/4" Dia. the thermal couple built in for monitoring real-time temperature inside the tube.
  • RS485 port included for computerized control
2.5KW ( 20A breaker required)
Voltage AC 208-240V Single Phase, 50/60 Hz
Max. Temperature 1500  oC
Continuous Temperature 1400  oC
Temperature Accuracy +/ - 1 °C
Heating Zone Length  6" (152 mm)
Constant Temperature Zone 100 mm (+/-1oC) @ 800 - 1500 oC
Heating Elements SiC rod (1500C grade) , 4 pcs

Two S type thermal couples are included. One S type 5" Length is built in furnace to control furnace temperature (below left)
And another S type 14"  inserted inside tube to monitor sample real temperature profile (below right)
 (Click pic for replacing part)      (Click pic for replacing part)
Temperature Controllers

  • Two digital temperature controllers with 30 programmable segments are built in. One control furnace temperature and another monitor temperature of the sample inside processing tube.
  • Built-in over temperature alarm and protection allows for operation without an attendant.
  • +/- 1 ºC temperature accuracy.
Heating & Cooling Rate

Temp vs Time curve
(Mullite tube)

Temp Vs Time curve
(Quartz tube)
For Mullite Tube:
 Heating speed:
 10°C/sec   (RT - 800°C);
  7°C/sec    (800°C - 1000°C);
  4°C/sec    (1000°C - 1100°C);
  3°C/sec    (1100°C - 1200°C);
  1.5°C/sec (1200°C - 1300°C);
  0.7°C/sec (1300°C - 1350°C)
Cooling speed:
  14°C/sec    (1350°C - 1000°C);
  7°C/sec      (1000°C - 800°C);
  5°C/sec      (800°C - 600°C);
  3.76°C/sec (600°C - 500°C);
  2.5°C/sec   (500°C - 400°C);
  1.36°C/sec  (400°C - 300°C) 
For Quartz Tube:
Heating speed:
30°C/sec (RT - 500°C);
12°C/sec (500°C - 800°C);
5°C/sec (800°C - 900°C);
3.6°C/sec (900°C - 1000°C);
1°C/sec (1000°C - 1100°C);

Cooling speed:
16°C/sec (1100°C - 800°C);
9°C/sec (800°C - 600°C);
5°C/sec (600°C - 500°C);
3.6°C/sec (500°C - 400°C);
2.5°C/sec (400°C - 300°C);
Processing Tube Size

(one mullite tube and one quartz tube are included in the standard package)
Oneend Closed  mullite tube made in the USA
Size:  OD: 50mm x ID 44mm  x 304.8mm L
Max. Working Temp. 1500oC in air
    Max. Temp. 1300oC in vacuum
One end closed quartz tube
Size: OD: 50mm x ID 44mm x 304.8mm L
Max. Working Temp. 1200oC inair
   Max. Temp. 1000oC in vacuum
Optional:CF Type Quartz Tube
with flange  for Ultra-hi-vacuum
 10-6 torr,1000oCMax.
Warning:  Processing tube is consumable and easy to broken during RTP, not covered by warranty.  Pls click pic above to order spare
Sliding Flange
  • Double sliding rail made by Cr-plated steel
  • Sliding length: 350 mm
Vacuum Seal & Digital Vacuum Gauge
  • One stainless steel flanges with 1/4"Dia fitting for insect thermal couple is included
  • One digital vacuum gauge and valves are included for immediate use.
  • 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.
Vacuum Level 
  • Limited by the pump. ( pump is not included )
    • 10E-5 torr can be reached by molecular pump
    • 10E-2 torr by a mechanical pump.
Dimensions 400L  x 305W x 530H mm (15.7" x 12" x 21")
Net Weight ~ 45 Kg
Shipping Package Size 47"x31"x40"
Shipping Weight 150 lbs
Warranty One year limited manufacturer's warranty with lifetime support (Consumable parts such as furnace liner, processing tubes, heating elements, and O-rings are not covered by the warranty, please order 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
  • UL / MET / CSA Certification is available upon request, additional charges will apply
  • Temperature controller is MET and CE Certified
  • Transformer is UL Certified


Click here to learn more about the installation of a gas regulator.
  • To get the fast heating performance, first keep the tube out of the chamber meanwhile, preheat the chamber to the required temperature. Then insert the tube into the chamber to get fast heat. Please watch the demo video below to see how this is done.
  • The tube furnaces with processing tube are designed for using under vacuum and low pressure < 0.02 MPa / 0.2 Bar/ 3 PSI.Vacuum limit definition for all mullite tube furnaces: * Vacuum pressures may only be safely used up to 1300°C
  • 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.  
  • 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 gasses should be limited to < 200 SCCM ( or 200ml/min )
  • NOTE The mullite tube shall be considered as a consumable part. We strongly recommend user keep spare tubes in order to ensure the continuity of operation. The tube is not covered by Warranty. Use the link to order more. 
  • Please wear protective gears, such as heat resistant suit & gloves, if you intend to retract the tube from the heating chamber. DO NOT TOUCH THE TUBE SURFACE WHEN IT IS HOT!

Operation Instructions 
& Demo  Video
Application note You may modify the RTP furnace into a small RTE ( rapid thermal evaporation ) or HPCV ( hybrid physical & chemical vapor deposition ) by DIY. please click the picture below to see how: 
Attention Notes Performance degradation (i.e. furnace can not reach the maximum temperature 1500°C or it is drawing a higher than normal working current) can be expected due to the use of aged SiC heating elements. It is necessary to replace all the heating elements if the above symptoms were seen.

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