1200C 1-Zone Top-Open Tube Furnace w/ Kanthal Element

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Mitsubishi refractory lining, Shimaden 40-seg PID controller, overheat/power failure protection, PC interface, quartz tube, vacuum flanges incl. ETL/CE certified, standard.


SKU: 691 Category:



Ai STF1200 series top-open tube furnaces feature the famous Kanthal (Sweden) spiral wire coils embedded in Mitsubishi (Japan) high quality grade 1500 alumina fiber insulation. A double walled steel internal housing helps minimize heat loss to exterior surface.

Furnace operation is controlled by Shimaden (Japan) 40-segment digital controller with built-in RS485 digital communications port and USB adaptor, allowing the user to connect to a PC for remote control and monitoring of the furnace. You can also save or export test results.


  • Compact, portable and lightweight design.
  • Top-open furnace chamber for fast and easy tube access.
  • Standard package includes set of stainless steel vacuum sealing flanges with valves and pressure meter.
  • Microprocessor based self-tuning PID control provides optimum thermal process with minimal overshoot.
  • Multiple atmosphere processes in a single cycle are possible (ex: binder burn out in air and parts sintering under rough vacuum or inert gas environment.)
  • Built-in ammeter and dual voltmeters for easy monitoring and troubleshooting.
  • Built-in computer interface.
  • Long life type K thermocouple.
  • ETL and CE certified, standard


  • Overheat protection shuts down the furnace if temperature is outside of acceptable range (refer to controller’s manual) or when the thermocouple is broken or malfunctions.
  • Power failure protection resumes furnace operation right after the point of failure when power is reestablished.

Warning! NEVER fill furnace with explosive gases, including Hydrogen, Carbon Monoxide and Methane.

General specifications

 Electrical requirements  208-240VAC, 50/60 Hz, single phase
 Tube material  Quartz
 Maximum working temperature  1200°C (2 hours maximum continuous run time)
 Maximum constant working temperature  1100°C
 Constant working temperature under vacuum  1000°C
 Minimum working temperature  Ambient
 Rated vacuum pressure
 0.001 Pa / 0.0075 millitorr / 0.00001 mbar
 Rated positive pressure  0.02 MPa / 150 torr / 3 psi
 Heating element type
 Kanthal (Sweden) A1 2.0 resistance coil wire
 Thermocouple type  K
 Refractory lining  Mitsubishi (Japan) high quality 1500 grade fiber alumina
 Temperature controller  Shimaden (Japan) fp93 (made in Japan) with 4 patterns and
 40 segments (ie. 4 x 10 segments or 2 x 20 segments)
 Maximum heating rate    < 30°C / min
 Heating zone length  16 inches
 Constant temperature zone length    10 inches
 Temperature controller precision
 ± 1°C
 Vacuum sealing flange kit

 Stainless steel vacuum sealing flanges with one vacuum gauge,
two valves and four thermal ceramic blocks.      

 Gas inlet/outlet
 1/4″ hose barb with 1/4″ BSPT (British Standard Pipe Thread)
 ETL tested to UL and CSA standards, CE
 Product brochure

Size comparison

 Tube size (OD x length)
 60mm x 1m
 100mm x 1m
 150mm x 1m
 200mm x 1m
 250mm x 1m
 Maximum output  2.5 kW  3.5 kW  5 kW  6 kW  8 kW
 Furnace assembled (LxWxH)  49x18x27″  49x18x27″  49x19x28″  49x20x29″  49x20x29″
 Shipping dimensions (LxWxH)  46x21x36″  46x21x36″  46x22x37″  50x28x40″  50x28x40″
 Shipping weight (Lb)  270  350  470  520  670





How to Program Across International furnaces


How to Install an Across International Tube Sealing Flange


Standard Package


Part description    






Part image 


 STF1200 top-open tube furnace
 1 pc
 Quartz tube 1000mm length
 60-100mm OD: 2 pcs, 150mm/250mm OD: 1 pc

 1-2 pcs

 Stainless steel vacuum sealing flanges w/ pressure gauge
 1 set

 Analog flow meter 1 pc  
 Stainless steel hook
1 pc

 Alumina thermal block (for 120mm OD and down)
 Quartz thermal block (for 150mm OD and up)
 to protect flanges sealing gaskets from heat damage

2 pairs


 Alumina crucible 5 pcs 

 Thermal gloves 1 pair

 Spare fuse 2 pcs

 USB/RS485 computer interface kit 1 set

 L6-30P 250 volt twist-lock plug
 (No plug installed for 250mm OD, only power cable)
 Furnace and Shimaden controller manual 2 pcs

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