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Stability Refrigerators

New FDA cold storage requirements (+2°C to +8°C) raise the bar for laboratory storage, making many existing laboratory refrigerators obsolete. In the past, standard refrigerators were often used for laboratory storage, but struggle to maintain the uniformity and control needed under today's FDA regulations.

In response to the new regulations, BioCold has developed a line of stability refrigerators which provide an economical solution for today's storage requirements. With temperature control at ±0.3°C, and uniformity of ±1.0°C throughout the chamber, these chambers are ideal for FDA validation.

Their stability refrigerators come standard with glass door, four adjustable shelves (available in aluminum or white wire), and oversized hot gas bypass refrigeration system for fast pull-down and recovery times.

Reduced humidity options are also available for seed storage and other applications requiring cold storage at 60% RH or below.

Stability Freezers

BioCold offers stability freezers suitable for FDA validation in sizes ranging from 24 to 85 cubic feet. Freezers are available in stainless steel or aluminum finishes, all with a solid door, rear wall plenum, and oversized refrigeration system for fast temperature pull-down and recovery times. Using hot gas bypass refrigeration with microprocessor-based PID controls, they are able to control temperature at ± 0.3°C during normal operation. Standard freezers operate in a range of -25°C to 0°C. Additional models to -40°C also available.

The test of a stability freezer is in the defrost cycle. How often is a defrost cycle required? How long does the cycle last? And what is the temperature upset during the defrost cycle?

On their stability freezers, they combine a rear wall plenum with aluminum heatsink on the plenum and floor to achieve a temperature rise of not more than 5°C on defrost.

The frequency of defrost cycles is directly related to the ambient conditions of the facility in which the freezer is located, and the number of door openings throughout the day. The more moisture in the ambient air, the more frost will form on the coil when the door is opened, necessitating more frequent defrost cycles.