1600 -1700 °C Muffle Furnaces...

1700°C High Temperature Inert Gas Atmosphere Box Furnace, ( 8x8x8", 8L ) - KSL-1700X-GS

1700°C High Temperature Inert Gas Atmosphere Box Furnace, ( 8x8x8", 8L ) - KSL-1700X-GS

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Product Name 1700°C High Temperature Inert Gas Atmosphere Box Furnace, ( 8x8x8", 8L ) - KSL-1700X-GS
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Product Code KSL1700XAC
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KSL-1700X-GS is a CE certified box furnace designed for materials synthesis under an inert gas atmosphere with temperatures up to 1700 ºC. The furnace consists of high-quality alumina fiber bricks and Molybdenum alloy heating elements with an 8"x 8"x8" heating chamber. A vacuum-sealed steel chamber with a water cooling jacket as well as the vacuum & gas flow control system enables material processing under inert gas atmosphere. It furnace also can be worked with pure oxygen with optional MoSi2 heating element and power connection.


Furnace Structure

  •      •  Double-layer stainless steel structure for maximum vacuum and safety
  •      •  Spring-loaded pressure relief valve installed on the furnace provide protection against chamber
  •      •  Water cooling front door and air cooling shell.
  •      •  Built in the vacuum pump and two-channel gas flowmeters, pressure gauge needle valves.

Inside Chamber Size

  •      •  Heated chamber: 200 x 200 x 200 mm (8x8x8 inch), 8 Liter.
  •      •  Energy-saving 1800 grade fibrous alumina insulation.
  •      •  High purity Al2O3 coating.


7.5 KW


AC 208 - 240V single phase; 50/60 Hz


36 Amp (50 Amp air breaker is required)

Continuous Working Temperature


Maximum Working Temperature

1700°C (< 1 hr)

Heating Rate

C / min

Temperature Accuracy

+/- 1°C


two B type thermocouples (control thermocouple and secondary alarm thermocouple)

Temperature controller

Main Temperature Controller is used to setting and running the 30-segment heating program and provides the 1-level temperature alarm protection.

Secondary Temperature Controller reads the temperature from the secondary B type thermal couple, monitors the temperature during all process and provides the 2-level temperature alarm protection.

Pressure Control

  •      •  The pressure sensor and pressure controller are installed. It reads the chamber pressure and
             controls the inlet and outlet gas valves respectively according to the pressure limit settings.

  •      •  The pressure control can be used to perform the following functions:
    •          º  Purging
    •          º  Pressure control
    •          º  High and Low-pressure protection
  •      •  The pressure controllable range: -0.06 to 0.03Mpa.

Heating Elements

Working gas

  •      •  6 pcs Mo Alloy coils (can only be used under inert gas, Ar is preferred; cannot be used under air
            or oxygen at the temperature > 300°C
  •      •  Optional:  If using with pure oxygen gas, must use MoSi2 heating element with Ni power
             connection wire。  Please call us in advance for the modification

Temperature Control

  •      •  PID automatic control via SCR (Silicon Controlled Rectifier) power control with phase angle fired,
            current limiting resistor.
  •      •  30 programmable segments for precise control of heating/cooling rate and dwell time.
  •      •  Over-temperature protection and thermocouple failure alarm functions allow operation without
  •      •  +/- 1ºC temperature accuracy.
  •      •  RS485 Communications 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 the detail 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.

Pressure Relief Valve

Spring Loaded Type Pressure Relief Valve

  •      •  Cracking pressure is manufacturer pre-set at 0.066Mpa (relative pressure value).
  •      •  Valve close pressure: 0.03Mpa (relative pressure value).
  •      •  Max. Temperature 200ºC.
  •      •  35mm O.D barb fitting for gas exhaust.

Gas Flow Control and

Vacuum Valve

  •      •  Two flow meters (#1: 0~8L/min; #2: 0~4L/min) are installed on the front panel of the furnace.
  •      •  One heavy-duty vacuum pump (CE certified) is built on the bottom of the furnace.  
  •      •  Optional: You may order a (UL certified) pump at extra cost
            (Pls click the right picture below to see specs).
                    ( CE certified )                ( TUV certified )

Water Cooling

  •      •  A 16L/min recirculating water chiller is installed in the bottom of the furnace for cooling furnace
            sealing flange (CE certified only)
  •      •  MET Certification (UL 1450) for water chiller is available upon request at extra cost, please contact
            our sales representatives for a quote.

Net Weight


Shipping Weight

1200 Lbs.

Product Dimensions

Please click the picture on the left to view dimensions:

Shipping Dimensions

58" x 46" x 89"


One year limited warranty with lifetime support. (Consumable parts such as sample plates and heating elements are not covered by the warranty, please order the replacement at related products below.)


  •      •  CE Certified for the furnace, vacuum pump, and water chiller.
  •      •  NRTL (UL61010)  or CSA certification  is available at extra cost.( please click mark below to learn details


   Application Notes

  •      •  For preserving the longevity of the furnace components, we recommend the heating rate not to
             exceed 5 °C /min.
  •      •  The cooling rate shall also not exceed 5 °C /min.
  •      •  Small cracks may appear on the surface of the refractory ceramics over extended use. This is a
            normal occurrence and the cracks may be repaired with
    alumina coating.
  •      •  Please click here to learn how to DIY gas purging system.
  •      •  The refractory block must be inserted before closing door.
  •      •  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.


  •      •  ATTENTION: Any damages caused by the use of corrosive and acidic gasses are not under the
            coverage of MTI One Year Limited Warranty.
  •      •  In order to prevent oxidation/corrosion damages to the Mo heating elements, it is necessary to keep
            a constant inert gas (Ar preferred) flow throughout the entire process. This is the most effective way
            to carry out any by-products.

   Operation Instructions