Johnv 14 Posted September 20 We recently received a blood bank plasma freezer thermometer 20C to -90C in a bottle filled with sand instead of glycerol or ethylene glycol. Has anyone had experience with blood product freezer thermometers whose measuring bulb is immersed in sand? Share this post Link to post Share on other sites
AMcCord 1,042 Posted September 21 That's what I use in our ultra-low freezer. Works fine. Share this post Link to post Share on other sites
John C. Staley 939 Posted September 23 I had never heard of it but it sounds like a great idea to me. Wish I had thought of it! 1 Eagle Eye reacted to this Share this post Link to post Share on other sites
ChrisH 26 Posted September 28 We have used them for a few years. A lot easier to clean up the sand then glycerol. 2 Malcolm Needs and John C. Staley reacted to this Share this post Link to post Share on other sites
