Freeze/thaw indicator

Details Freeze/thaw indicator Freeze/thaw indicator

F - Mech Eng,Light,Heat,Weapons

25

B

116/67

F25B 49/00 (2006.01)

Patent

CA 1052633

FREEZE/THAW INDICATOR ABSTRACT OF THE DISCLOSURE A freeze-thaw indicator for evidencing thawing of frozen foods in freezer compartments which has a float disposed in the container containing an aqueous solution of urea. The float is frozen in place in an immersed condition in the urea and rises only when the aqueous solution has been subjected to thawing temperatures over a time sufficient to completely liquify the aqueous solution. The strength of the aqueous solution is adjusted so that it will not liquify during the freeze thaws cycles of frost-free-type of refrigerators.

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