Monitoring of temperature changes (otherwisespeaking, thermometry) is required in laboratory or chemical studies, to comply with process technology in production or to ensure the safety of products.
Undoubtedly, the most common devices,allowing you to measure the temperature, these are thermometers. These include meteorological and laboratory, medical and electrocontact, technical and manometric, special and signaling. The total number of modifications is several dozen.
Methods and devices for determining the temperature
Familiar thermometers for us - only a small partof all the devices or devices that exist today, which are used in a situation where temperature measurement is necessary. The determination of the value of thermal parameters can be carried out by several methods. The principle of operation of each device is a specific parameter of the substance or body. Depending on the range in which the temperature measurement is to be performed, various devices are used.
Naturally, the question arises as to howThe physical properties make it possible to measure air temperature or hot metal. In manometers, the force of gas or liquid pressure is taken as a basis for a certain temperature regime. Pyrometers and thermal imagers allow us to estimate the temperature of the surface of an object, perceiving the thermal radiation emanating from it (pyrometers show the data in digital form, the thermal imager produces a "picture" of the object and its temperature). The use of the thermoelectric effect consists in the construction of a thermocouple. By and large, the thermocouple is a closed circuit of two different conductors. A certain temperature effect causes a certain stress. A similar principle is also used in resistance thermometers.
In general, the methods for measuring temperature can be divided into contact and non-contact methods. The widest example of a contact method is a medical thermometer, a contactless thermographic camera.
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