Compact Temperature Cycling Chambers

Fast 15°C/min. change rate

The new BTZ-4200 takes advantage of compact, modern scroll compressors to bring fast temperature cycling to small form factor. The chamber can cycle temperatures at rates up to 15°C/minute without requiring cooling water or liquid nitrogen. 

The faster cycle times can be used to meet more aggressive test methods that require thermal stress during transitions. Significant test time can be saved in completing tests, as well.

To demonstrate performance, ESPEC uses the international standard IEC 60068 3-5 measured at the supply air. Temperature cycles are run from hot to cold extremes, and the middle 80% of the transition is timed to determine performance. Your actual cycling results will vary depending on methodology, including the start and end temperatures, and the amount of samples loaded.

The BTZ-4200 is based on our space-saving Criterion benchtop series. The overall footprint is just 31" x 45". Because it is so small and only requires only electrical utilities, it may be the ultimate portable temperature cycling chamber.

  Compare Benchtop Models Side-by-side comparison of up to three models.



  • Stainless steel exterior and interior
  • Rounded interior corners for easy cleaning
  • Full thermal break around doorframe and door
  • Rotating door latch is easy and secure
  • Dual-layer insulation of fiberglass and expanded foam for thermal integrity
  • One 2" (50mm) diameter cable port on the left, with an impervious, flexible silicone plug
  • Easy lift-off service panels
  • Pressure relief port to allow air volume changes due to rapid temperature changes
  • Three levels of overheat protection


  • Popular PID controller with touch-screen operation
  • Stores 40 different profiles 
  • Step types include: ramp, soak, jump, auto-start, and end
  • Ethernet interface for remote monitoring and operation


  • Dry air purge, to compensate for quickly shrinking air during cooling, as well as to reduce risk of condensation.
  • Product temperature control, allows feedback from a second sensor on the product. Ensures faster completion of transition steps.
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Compact Temperature Cycling Model Comparison

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Model / Link Interior Dimensions
(W x D x H)
Interior Volume Temperature Range Humidity Control Change Rate
BTZ-4200 19.6" x 15" x 23.6" 4 cu. ft. -70 to 180°C No up to 15°C/min.
Click model number for details, including metric & english units.

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