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2. Low-temperature technology timeline - Wikipedia

   en.wikipedia.org/wiki/Low-temperature_technology...

   1665 – Boyle theorizes a minimum temperature in New Experiments and Observations touching Cold. 1679 – Denis Papin – safety valve; 1702 – Guillaume Amontons first calculates absolute zero to be −240 °C using an air thermometer of his own invention (1702), theorizing at this point the gas would reach zero volume and zero pressure.

3. Thermistor - Wikipedia

   en.wikipedia.org/wiki/Thermistor

   As a thermometer for low-temperature measurements of the order of 10 K. ... external air or engine oil temperature, ... refrigerators, freezers, hair dryers, etc. all ...

4. Temperature data logger - Wikipedia

   en.wikipedia.org/wiki/Temperature_data_logger

   Most are used to monitor temperature conditions, and some versions can also measure the relative humidity. Data loggers are often small enough to be placed inside an insulated shipping container or directly attached to a product inside a refrigerator truck or a refrigerated container. These monitor the temperature of the product being shipped.

5. Dilution refrigerator - Wikipedia

   en.wikipedia.org/wiki/Dilution_refrigerator

   A 3 He/ 4 He dilution refrigerator is a cryogenic device that provides continuous cooling to temperatures as low as 2 mK, with no moving parts in the low-temperature region. [ 1 ] [ 2 ] The cooling power is provided by the heat of mixing of the helium-3 and helium-4 isotopes.

6. If You Have Frost in Your Freezer, This Is What It Means - AOL

   www.aol.com/lifestyle/frost-freezer-means...

   General Electric: “Refrigerator—Frost or Ice Crystals on Food in Freezer” Summit Appliance : “How to Defrost Your Freezer: The DOs & DON’Ts of Defrosting”

7. Thermometer - Wikipedia

   en.wikipedia.org/wiki/Thermometer

   Thermometers are used in roadways in cold weather climates to help determine if icing conditions exist. Indoors, thermistors are used in climate control systems such as air conditioners, freezers, heaters, refrigerators, and water heaters. [56] Galileo thermometers are used to measure indoor air temperature, due to their limited measurement range.