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5 Side Heating Atmosphere Controlled Muffle Furnace (1200°C - 16"x16"x 16" 64 L) - KSL-1200X-AC-5S

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Item Number: KSL1200XL5AC


KSL-1200X- AC-5S  is a five-side heating atmosphere-controlled muffle furnace, which is designed for material synthesis under a controlled inert gas atmosphere up to 1100 ºC with better temperature uniformity. The furnace consists of high-quality alumina fiber brick and Kathal Fe-Cr-Al heating elements with 64L capacity, as well as a vacuum-sealed steel case with a water cooling jacket. It is an ideal tool for preparing new materials which require a heat treatment under inert gas or oxidizing gas. (Updated from KSL-1100X- AC from 8/15/14)


Furnace Structure

  • Double-layer stainless steel structure for maximum vacuum and safety,
  • The refractory alloy muffle is built-in with a water-cooling wall with dimension 470 LX 410W X 550H (mm), which can stand at positive pressure up to 0.06Mpa and vacuum up to - 0.09Mpa.
  • High purity porous alumina is  built-in inside of the refractory alloy muffle as thermal insulation
  • Water cooling front door and air cooling shell
  • Built-in Pressure gauge, vacuum valves, and two gas flowmeters.
  • The furnace be used with Inert gas  or  low vacuum ( 10-1 torr by the mechanical pump)
  • It also can be used with pure oxygen with the modified power connection.  Please call us if you use oxygen.
  • Refractory ally box inside the heating chamber is optional for better inert gas control

Chamber Interior

  • Five sides heating, e.g. left, right, bottom, back, and front, to achieve the best temperature uniformity than three sides heating.
  • High-quality fibrous and porous alumina is used as the thermal insulation layers.
  • Kanthal 1350°C grade Fe-Cr-Al resistance heating wire
  • Heated chamber:  400x 400x 400 mm (~ 16"x16" x16"), 64 Liter

Working Temperature &
Constant Temperature Zone

  • Continuous Working Temperature 1100° C
  • Maximum Working Temperature 1200°C (< 1 hrs)
  • Constant temperature zone:  
    • +/- 2°C within center 200×200×200 mm cubic zone
    • +/- 4°C within center 400×400×400 mm cubic zone
Maximum Sample Loading
  •  35 kg

Temperature Controller

  • FA-YD518P-AG temperature controller is included.
  • Proportional–integral–derivative control (PID control) and auto-tune function
  • 30 segments programmed with ramping, cooling and dwelling steps
  • Built-in over-temperature alarm and thermocouple failure alarm
  • +/- 1 ºC temperature control accuracy
  • Default DB9 PC communication port

The temperature controller (optional)

  • MTS02-Y Temperature control software kit (for YD518P series controllers) + brand new laptop package is available at the options bar. Click for detailed information about the MTS02-Y software kit. 
  • You may upgrade the temperature controller to the Eurotherm Temperature Controller which is fully compatible with LabVIEW with +/- 0.1ºC accuracy.   This package includes a Eurotherm programmer, a communication cable (RS485 - USB), and a software CD. Click the pic left to view the full spec of the Eurotherm temperature controller.  


Heating Rate

  •   < 10 °C / min recommended
  •  20 °C/ min Max.    

Temperature Accuracy

  • +/- 1°C
Gas flow control &
Vacuum Valve

  • Two larger flow meters are installed in the front panel of the furnace to allow two types of gas mixing and flowing at the same time 
  • One KF 25 vacuum port is installed in the left of the furnace to remove air by vacuum pump before filling gas
  • One heavy-duty vacuum pump ( CE certified ) built-in bottom furnace.  
Water Cooling
  • A 16L/min recirculating water chiller is included for cooling the furnace KJ5000
  • Short water power off and Over-temperature alarm built-in 
Working Gases
  • All types of inert gases such as N2 and Ar at《 0.03Mpa.
  • Pure oxygen gas 《 0.03Mpa.  but need modifying internal connection wire for anti-oxidation, please call us in advance if you use O2 gas
  • Low vacuum 10-1 torr due to fibrous alumina insulation material.  Using 5% H2 + Ar  will improve oxidation during heating.  For oxygen-sensitive material, please use a hydrogen furnace

Power &  Working Voltage

  • 9.5 KW, 208 - 240V single phase,  50/60Hz  
  • Three-phase, AC 380V - 460V available upon request.
  • Note: Power cable included but without a plug. Please install a plug by your own 

  • CE Certified
  • NRTL (UL61010)  or CSA certification  is available at extra cost.( please click mark below to learn details

Dimension & Net Weight

  • H2050mm  X W 1280mm  x 1200 L
  • Net weight:  476 Kg

Shipping Weight & Dimension 

  • 2000 lbs
  • 58" x 54"x 91"


  • One-year limited warranty with lifetime support
  • We reserve the right to upgrade the furnace structure for better performance without notice

Demo Video
Operation Instruction


Warning & Note

  • The Max pressure of this furnace is 7.5 PSI ( 0.5 atm ).  You must install a pressure regulator on your gas tank to avoid over-pressure. Click here to learn the installation of a gas regulator.
  • Corrosive gasses or materials that react with the FeCrAl alloy heating elements cannot be used in the furnace!
  • Toxic, corrosive, or flammable gasses are not recommended for use with this furnace. Please consult with our engineering team for more details
  • Please contact MTI engineerings whether your processes are compatible with this furnace. Graphite or carbon-based samples are not recommended to use.

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