HAST (Highly Accelerated Stress Test) chambers reduce the time it takes to complete humidity testing for semiconductors. By elevating temperatures above 100°C and increasing the pressure, simulation of normal humidity tests can be made while maintaining the same failure mechanisms. Tests can be completed in days, not weeks. Our HAST systems have a modern design that's easier to use:

  • Automatic humidity filling
  • Automatic door lock
  • A round workspace, allowing wider sample boards to be loaded
  • Convenient, hermetic power-pin system for bias testing

We now offer an "Air HAST" modification for faster testing of lead-free solder whisker resistance to humidity.

Features for HAST - Highly Accelerated Stress Test Chambers
  • Unsaturated or saturated humidity control
  • Multi-mode 'M' system controls humidity (via wet bulb/dry bulb), even during heat-up and cool-down. Fully conforms to EIA/JEDEC test method A110 & 102C.
  • Touch-screen controller with temperature, humidity, and count-down display. Includes Ethernet interface.
  • Language selection of English, Japanese, Chinese, or Korean
  • Specimen power terminals, allow power-up of specimens

Cabinet Features:

  • Inner cylinder and door shield protect specimens from dew condensation
  • Interior is cylindrical for maximum product loading
  • Two stainless steel shelves
  • Set of casters for easy movement of the chamber (except double units)

Safety Features:

  • Overheat & over-pressure protectors
  • Door lock safety mechanism to prevent opening of the door while the chamber is pressurized
  • Specimen power control terminal: shuts down the product power in the event of an alarm

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Designed for consistant, repeatable results

Product Suggestions
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    Model NumberInterior Dimensions
    (W x D x H)
    Interior VolumeTemperature RangeHumidity ControlNotes
    EHS-212M11.5" x 11.6" x 11.5"0.64 cu. ft.105 to 142°CYesPressure: 0.02 to 0.196 MPa gauge (0 to 28 psig)
    EHS-222M15.5" x 16" x 15.5"1.62 cu. ft.105 to 142°CYesPressure: 0.02 to 0.196 MPa gauge (0 to 28 psig)
    EHS-212MD11.5" x 11.6" x 11.5"0.64 cu. ft.105 to 142°CYesPressure: 0.02 to 0.196 MPa gauge (0 to 28 psig) . Two chambers in one unit.
    EHS-222MD15.5" x 16" x 15.5"1.62 cu. ft.105 to 142°CYesPressure: 0.02 to 0.196 MPa gauge (0 to 28 psig) . Two chambers in one unit.
    EHS-412M11.5" x 11.6" x 11.5"0.64 cu. ft.105 to 162°CYesPressure: 0.02 to 0.392 MPa gauge
    EHS-412MD11.5" x 11.6" x 11.5"0.64 cu. ft.105 to 162°CYesPressure: 0.02 to 0.392 MPa gauge (0 to 57psig). Two chambers in one unit.
    EHS-431M22" x 22" x 22"4 cu. ft.105 to 162°CYesPressure: 0.02 to 0.392 MPa gauge. Cylindrical workspace (Replaced model #: TPC-432ZM)

          Click model number for details, including metric & english units.

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