ZoneOne Stability Chambers

Designed for ICH Q1A stability test requirements

The ZoneOne temperature/humidity chamber provides outstanding stability testing performance for manufacturers of pharmaceuticals, biologics, food, and personal care products. This chamber is easy to use, durable, and comes with the full range of features needed to support a wide range of stability test requirements. Suitable for ICH Q1A conditions:

  • Long term: 25°C/60%, 30°C/65%
  • Intermediate: 30°C/65%
  • Accelerated: 40°C/75%


Humidity Control Chart





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


  • Performance meets ICH Q1A general case guidelines for pharmaceutical stability testing
  • Refrigeration configured for frost-free, continuous operation
  • Heated full-view window for easy viewing without condensation problems
  • Horizontal airflow for uniform sample exposure
  • Watlow EZ-ZONE PID controller
  • Includes three adjustable solid shelves with lips to protect against spills
  • Designed for flush installation on all sides; casters are standard
  • One year parts and labor warranty with factory-trained technicians
  • IQ OQ PQ certification services available

ZoneOne Stability Model Comparison

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Model / Link Interior Dimensions
(W x D x H)
Interior Volume Temperature Range Humidity Control Notes
EZO30-WA 27.5" x 27.8" x 63.5" 28.1 cu. ft. 10 to 65°C Yes
EZO60-WA 55" x 27.8" x 63.5" 56 cu. ft. 10 to 65°C Yes
EZOT30-WA 27.5" x 27.8" x 63.5" 28.1 cu. ft. 10 to 65°C No
EZOT60-WA 55" x 27.8" x 63.5" 56 cu. ft. 10 to 65°C No
Click model number for details, including metric & english units.

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