[Nhcoll-l] Vapor-phase nitrogen freezers

[Corey Scobie]

Mariel,

We purchased the MVE Vario 1536P last year and are quite happy with it overall. We only go in the cryogenic tank about once per week and it consumes about 5.3L/day. We have a 230L dewar connected to the cryogenic tank and it typically lasts 14 days. Due to the high cost of liquid nitrogen ($6,000 CAD/year/cryogenic tank), we are looking into purchasing a liquid nitrogen generator.

Our freezer alarms are connected directly to security, so when the low level alarm goes off I get a call from security and I order another dewar of LN.

Cheers,
Corey


Corey Scobie, Ph.D.
Assistant Curator of Ornithology
Royal Alberta Museum
Edmonton, Alberta, Canada
780-732-6871



From: nhcoll-l-bounces at mailman.yale.edu [mailto:nhcoll-l-bounces at mailman.yale.edu] On Behalf Of Mariel Campbell
Sent: Wednesday, August 24, 2016 12:26 PM
To: nhcoll-l at mailman.yale.edu
Subject: [Nhcoll-l] Vapor-phase nitrogen freezers

Hello,
I am looking for information on nitrogen usage and general pros and cons of Chart MVE vs Taylor Wharton Labs series vapor phase nitrogen freezers. I know that Chart seems to be the industry standard, but I'd like to get an idea from users as to what the nitrogen consumption actually is with fill losses, to compare with claims by other manufacturers. We are looking at purchasing the larger 1894R series tanks, but any info on any of their products would be much appreciated.

Also, does anyone have recommendations on good freezer monitoring and alarm systems?
Thanks!

Mariel Campbell

Collections Manager, Division of Genomic Resources
Museum of Southwestern Biology ,University of New Mexico
CERIA Bldg 83, Room 204, Albuquerque, NM 87131
(505) 277-7808<tel:%28505%29%20277-7808> office,email: campmlc at unm.edu<mailto:campmlc at unm.edu>
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