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Freezers, Laboratory, Cryogenic, Vapor Phase Nitrogen

Definition : Freezers that use liquid nitrogen as the cooling agent and vapor phase nitrogen for storage. Vapor phase nitrogen storage provides a temperature of -140 degrees Celsius (-220 degrees Fahrenheit) that is not as low as liquid nitrogen (-180 degrees Celsius [-292 degrees Fahrenheit]), but decreases the risk of cross-contamination among the stored products compared to freezers using liquid nitrogen immersion. These freezers typically consist of a chamber with two vessels separated by a vacuum space (the inner vessel for the cryogenic fluid and the outer vessel intended to insulate the cryogenic liquid from the environment); automatic level and cryogenic temperature controls; an external container to replenish the cryogenic fluid; a pressure-relief device; and a pressure-control valve. Cells and/or tissues are immersed in the vapor atmosphere above the liquid nitrogen in appropriate containers. Vapor phase nitrogen cryogenic laboratory freezers are used mainly for cell and/or tissue (e.g., ovum, embryo, bone, cornea) storage for extended time periods (typically several years).

Entry Terms : "Vapor Phase Nitrogen Cryogenic Freezers"

UMDC code : 22074

   

1-6 of 6 Match(es).

Fisher Scientific Co (Canada)

Fisher Scientific Co (Canada)

Fisher Scientific GmbH

Fisher Scientific GmbH

Fisher Scientific Oy

Fisher Scientific Oy

Fisher Scientific UK

Fisher Scientific UK

Haier Medical and Laboratory Products Co Ltd

Haier Medical and Laboratory Products Co Ltd

Thermo Scientific Laboratory Sample Preparation

Thermo Fisher Scientific Inc. (NYSE: TMO) is the world leader in serving science. Our mission is to enable our customers to make the world healthier, cleaner and safer. With revenues of $12 billion, we have approximately 39,000 employees and serve customers within pharmaceutical and biotech companies, hospitals and clinical diagnostic labs, universities, research institutions and government agencies, as well as in environmental and process control industries

1-6 of 6 Match(es).

 

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