Thermometer for refrigerators or freezers

摘要: A portable visual temperature indicating device, adapted for use in refrigerators and freezers foodstuffs, comprises a transparent housing 2 enclosing an elongate bulb thermometer 6. The 8 of the is encased food simulant wax 10. portion displaying projects from wax, filled with gas, which may be air. Preferably, not more than 10% length material. cylindrical at one end extending coaxially within housing. In use, because has relatively high heat capacity, comparable that items stored refrigerator, device designed to react changes same way as items, such displayed corresponds closely rather surrounding