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1730 – René Antoine Ferchault de Réaumur invented an alcohol thermometer and temperature scale ultimately proved to be less reliable than Fahrenheit's mercury thermometer. 1742 – Anders Celsius proposed a scale with zero at the boiling point and 100 degrees at the freezing point of water. It was later changed to be the other way around ...
While this technique was originally applied to the refrigerator compartment, it was later used for freezer compartment as well. A combined refrigerator/freezer which applies self-defrosting to the refrigerator compartment only is usually called "partial frost free" or semi-automatic defrost (some brands call these "Auto Defrost" while Frigidaire referred to their semi-automatic models as ...
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.
Kelvinator ad from 1920 Kelvinator refrigerator, c. 1926. The enterprise was established on September 18, 1914, in Detroit, Michigan, United States, by engineer Nathaniel B. Wales, who introduced his idea for a practical electric refrigeration unit for the home to Edmund Copeland and Arnold Goss.
Commercial refrigerator and freezer units were in use for almost 40 years prior to the common home models. The freezer-over-refrigerator style had been the basic style since the 1940s, until modern, side-by-side refrigerators broke the trend. A vapor compression cycle is used in most household refrigerators, refrigerator–freezers and freezers.
Autonomous data loggers can be taken to diverse locations that cannot easily support fixed temperature monitoring equipment. [3] These might include: mountains, deserts, jungles, mines, ice flows, caves, etc. Portable data loggers are also used in industry and laboratory situations where stand-alone recording is desired.