A thermometer is called primary or secondary based on how the raw physical quantity it measures is mapped to a temperature. As summarized by Kauppinen et al., "For primary thermometers the measured property of matter is known so well that temperature can be calculated without any unknown quantities. Examples of these are thermometers based on the equation of state of a gas, on the velocity of sound in a gas, on the thermal noise voltage or current of an electrical resistor, an… WebVintage thermometer - wood old thermometer - wooden thermometer - Indoor thermometer Outdoor thermometer - Wall thermometer Ad vertisement by VintageAvangardShop. VintageAvangardShop. 4.5 out of 5 stars (297) Sale Price $26.10 $ 26.10 $ 29.00 Original Price $29.00 ...
A short history of measuring temperature - UMD
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48 Old Thermometers Stock Photos, Images & Pictures
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