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

Get A Fast, Free Price Quote


Designed for consistant, repeatable results

Product Suggestions
Related Resource Center Articles
Model Number Interior Dimensions
(W x D x H)
Interior Volume Temperature Range Humidity Control Notes
EHS-212M 11.5" x 11.6" x 11.5" 0.64 cu. ft. 105 to 142°C Yes Pressure: 0.02 to 0.196 MPa gauge (0 to 28 psig)
EHS-222M 15.5" x 16" x 15.5" 1.62 cu. ft. 105 to 142°C Yes Pressure: 0.02 to 0.196 MPa gauge (0 to 28 psig)
EHS-212MD 11.5" x 11.6" x 11.5" 0.64 cu. ft. 105 to 142°C Yes Pressure: 0.02 to 0.196 MPa gauge (0 to 28 psig) . Two chambers in one unit.
EHS-222MD 15.5" x 16" x 15.5" 1.62 cu. ft. 105 to 142°C Yes Pressure: 0.02 to 0.196 MPa gauge (0 to 28 psig) . Two chambers in one unit.
EHS-412M 11.5" x 11.6" x 11.5" 0.64 cu. ft. 105 to 162°C Yes Pressure: 0.02 to 0.392 MPa gauge
EHS-412MD 11.5" x 11.6" x 11.5" 0.64 cu. ft. 105 to 162°C Yes Pressure: 0.02 to 0.392 MPa gauge (0 to 57psig). Two chambers in one unit.
EHS-431M 22" x 22" x 22" 4 cu. ft. 105 to 162°C Yes Pressure: 0.02 to 0.392 MPa gauge. Cylindrical workspace (Replaced model #: TPC-432ZM)

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

Get quick pricing on HAST - Highly Accelerated Stress Test Chambers

Please complete all fields to ensure a fast response.


Price quotes include:
  • Pricing for unit, options, freight, and install/start-up
  • Current lead-time or stock status
  • Related documents: brochure, detailed specifications, drawing
  • Contact information for your local sales representative

Quotes are sent by the next business day for standard models shipping to North America. Complete all form fields to ensure a fast response.

Contacting ESPEC

Call Sales:

+1 616-896-6100 (8-5 EST)
Find & call your local sales rep

Product Support:

+1 616-896-6170 (8-5 EST)
Support request form