Polar (refrigerator)

Polar is a research refrigerator designed and developed by University of Alabama at Birmingham (UAB) Center for Biophysical Sciences and Engineering (CBSE) for NASA Cold Stowage. Polar was designed as a single mid-deck locker equivalent payload to store scientific samples on-board ISS and in transport to/from ISS via SpaceX Dragon or Cygnus spacecraft. Polar operates between 4 and -95 C.

Description

 * Polar is mounted in the ISS on the EXpedite the PRocessing of Experiments to Space Station (EXPRESS) rack.
 * Polar can maintain temperatures ranging from 4 to -95 C.
 * Polar is air-cooled via rear-air fan.

Additional Cold Stowage
Polar is one of multiple units available for storage on the ISS and/or transportation to and from the ISS. Others include:
 * Minus Eighty Degree Laboratory Freezer for ISS (MELFI)
 * 4 to -80 C
 * MERLIN (Microgravity Experiment Research Locker/ Incubator)
 * 48 to -20 C
 * GLACIER (General Laboratory Active Cryogenic ISS Experiment Refrigerator)
 * 4 to -160 C