WebA thermometer is a device that measures temperature or a temperature gradient (the degree of hotness or coldness of an object). A thermometer has two important elements: (1) a temperature sensor (e.g. the bulb of a … WebOlder thermometers of this type used liquid mercury. In response to our understanding of the health concerns associated with mercury exposure, these types of thermometers usually use some type of liquid alcohol. These liquid thermometers are based on the principal of thermal expansion. When a substance gets hotter, it expands to a greater volume.
The Anatomy of a Liquid-in-Glass Thermometer - AASHTO re:source
WebPhysical Properties. Mercury cannot be used below the temperature at which it becomes solid, -38.83 °C (-37.89 °F). If the thermometer contains nitrogen, the gas may flow down into the column when the mercury solidifies and be trapped there when the temperature rises, making the thermometer unusable until returned to the factory for reconditioning. WebProperties of Thermometric Liquid. The liquid that is used in the thermometer needs to have some properties, and they are listed below: The liquid used should be visible. The thermal … me the peaceful heart
Mercury-in-glass thermometer - Wikipedia
WebFeb 2, 2011 · Mercury is easily purified, it does not wet glass and vapor pressure in the capillary above mercury is small. Liquid-in-glass thermometers are unsuitable for automatic recording of results and often replaced by resistance thermometers or other instruments. Special constructions are metrological, clinical thermometers and others. WebProperties of materials that can be exploited for the making of a thermometer include: volume of a liquid (Mercury thermometer), electrical resistance, color (frequency) of emitted light from a heated object, volume of a gas, expansion of metal (bimetallic strip). 3. Which is larger, 1 C or 1 F (degrees)? 1C is larger than 1F. WebThe optical properties of a recoverable mercury salt photochromic paint were studied. 本文介绍了一种汞盐可逆光色涂层. ... The mercury in thermometer mounted up [ rose ] to 35℃. 温度计的 水银柱 升到摄氏35度. me the people film