Criterion Temperature and Humidity Benchtops

The Criterion temperature/humidity chamber series provides an economical and space-saving solution for a variety of testing requirements. The chamber's interior size is 3.5 inches wider than traditional benchtops, yet the exterior is 20% narrower.

  • Temperature range: -20/-70°C to +180°C
  • Humidity range: 10 to 95% RH
  • Chamber size: 4 cubic feet
  • Touch-screen Watlow F4T programmer with Ethernet access

The four cubic foot work space is the largest to be found in a benchtop unit, while requiring less footprint than even smaller comparable chambers. The vertical configuration saves bench space, plus the refrigeration’s ventilation design allows installation against a wall for even more space savings.

The programmer includes a temperature alarm as just one part of ESPEC's three-tiered over-temperature protection system. A thermal fuse and a user-set independent limit are also included. In addition, a specimen power terminal allows the user to safely operate powered equipment inside or with the chambers.


  Interior Dimensions
 (W x D x H)
Interior Volume Temperature Range Humidity Control Change Rate(heat/cool)


19.6" x 15" x 23.6" 4 cu. ft. -20 to 180°C 10 to 95%RH up to 1.5°C/min.
BTX-475 19.6" x 15" x 23.6" 4 cu. ft. -70 to 180°C 10 to 95%RH up to 2.75°C/min.




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