1200C Controlled Atmosphere Muffle Furnace ETL/CE Certified


GCF1200 series controlled atmosphere furnaces feature a chamber with Mitsubishi (Japan) high quality alumina fiber insulation and the famous Kanthal (Sweden) heating elements. 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.

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SKU: GCF1200 Categories: ,


The benefits of a controlled atmosphere furnace

An atmosphere furnace provides the perfect environment for various procedures in many laboratories, providing the controlled temperature and atmosphere specific projects require. The controlled atmosphere is desired to complete tasks that require exact temperatures with no room for error. This is the best way to ensure the successful outcome of your project because it is sealed tightly to ensure the proper environment.


One of the main components of the atmosphere furnace is the correct mixture of gases. The precise measurement of each gas is essential to the success of your project. You can use a separate chamber to mix the gases, which are then pumped into the furnace chamber where the work will be completed when they are done mixing. It is essential that the separate chamber that holds the gases does not receive any outside air because it could throw off the gas mixture and render your project useless.


Proper temperature control is vital to the success of your project as well. Temperatures that are too high or too low will cause problems with the process and could cost your company a significant amount of money. Across International furnaces come with built-in 28-segment PID digital temperature controller for accurate monitoring and consistency.


  • Multiple gas inlets and outlets with stainless steel ball valves. Flow meter to control inbound and outbound gas flows. Outlets can be ignited to burn off gas.
  • Furnace chamber is welded and oil leak tested to ensure air tightness. Furnace door is sealed with high temperature silicon gasket.
  • Built-in stainless steel water-cooling panel protects door sealing gasket when furnace is under heavy use.
  • 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.


* Ultimate vacuum level for GCF furnaces is around 100 Pa with all flange connections, and 1000 Pa with hose barb connections. Please keep in mind that our GCF atmosphere furnaces are NOT designed to be vacuum furnaces, the vacuuming part is mainly for users to pre-vac the chamber, before putting in inert or other protective gases.


Electrical requirements208-240V, 50/60Hz, single phase
Heating element type
Kanthal (Sweden) A1 2.0 resistance coil wire
Min/max/constant temperatureAmbient/1200°C/1100°C
Temperature controllerShimaden fp93 (Japan) with 4 patterns and
40 segments (ie. 4 x 10 segments or 2 x 20 segments)
Maximum heating rate15°C / min
Furnace cavity Mitsubishi (Japan) high quality 1500 grade polycrystalline alumina fiber
Thermocouple typeK
Gas inlet/outlet1/4″ hose barb with 1/4″ BSPT (British Standard Pipe Thread)
Positive pressureNot to exceed 0.02 MPa / 150 torr / 3 psi
Temperature controller precision +/- 1°C
Working environmentsAir, N2, Ar, NO2, CO, CO2, He, Ne, rough vacuum, etc. (Hydrogen, up to 5%)
ETL tested to UL and CSA standards, CE
DownloadProduct brochure

Size comparison


Chamber size (DxWxH)12x8x8″16x12x12″20x16x16″
Chamber capacity (cu ft)0.441.332.96
Usable chamber space (DxWxH)10x7x7″14x11x11″18x15x15″
Maximum output4 kW 19 amp9 kW 41 amp15 kW 69 amp
Shipping dimensions (LxWxH)38x26x44″40x30x48″49x44x61″
Net weight (Lb)350400800
Shipping weight (Lb)420470950


How to Program Across International Furnaces




Standard Package


Part description 


Part image
GCF1200 controlled atmosphere furnace1 pc 

Type K thermocouple1 pc
Flow meter1 pc
Alumina cushion block1 pc
Furnace door block1 pc
Stainless steel tongs1 pc
Thermal gloves1 pair
Spare fuse2 pcs
USB/RS485 computer interface kit1 set
Water pump1 pc
Furnace operation manual1 pc
Shimaden fp93 temperature controller manual & software1 pc

Additional information

Weight470 lbs
Dimensions40 × 30 × 48 cm
Chamber size

12x8x8", 16x12x12" (+$2,400.00), 20x16x16" (+$5,000.00)

Vacuum setup

3/8" hose barb with no pump (no extra charge), Ai 110/220V EasyVac 9 cfm 2-Stage pump w/ filter (+$790.00), Ai 110/220V SuperVac 5.6 cfm 0.3 micron pump (+$1,890.00), Ai 110V SuperVac 11cfm 0.3 micron pump (+$2,690.00), Edwards 110/220V 6.9 cfm RV8 pump (+$3,869.61), Edwards 110/220V 21 cfm E2M28 pump (+$6,183.97), Edwards 110/220V 7.5 cfm nXDS10iC pump (+$7,970.46), Welch 2052 110V 2.3cfm diaphragm pump (+$3,760.00)


No additional accessories (no extra charge), 2 quarts (1.9 L) of ultra grade 19 pump oil (+$40.00), EZ-Swap vacuum pump exhaust filter w/ fittings (+$159.00)


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