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Lijia Small Classroom: What is the Role of [Cold and Heat Impact Test Chamber] Sensor

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Release date: 2019-06-08

Hot and cold shock test chamberSensors are often calledPT100Sensors, thermocouples and thermal resistors in contact temperature measurement instruments are the most commonly used temperature detection elements in industry.Briefly introduce the principle and characteristics of gas:

Thermal resistance sensor measurement principle of cold and hot shock test chamber: Thermocouple is a temperature sensing element, which can convert temperature signal into thermoelectric potential signal, and the measured temperature can be measured through the cooperation of electrical measuring instruments. The basic principle of thermocouple temperature measurement is the thermoelectric effect.

In a conductor made of two different materialsAandBin the closed loop,WhenAandBThe two junctions of are at different temperaturesTandToWhen,A thermoelectric potential is generated in the circuit. This is known as the Seebeck effect. ConductorAandBcalled the hot electrode. The higher temperature end (T) Called the working end (usually welded together); the lower temperature end (To) Called the free end (usually at a constant temperature). According to the relationship between thermoelectric potential and temperature. Can be made into thermocouple indexing table. The indexing table is at the free end temperatureTo = 00Cobtained under the conditions. Different thermocouples have different indexing tables.

When the third metal material is connected to the thermocouple circuit, as long as the temperature of the two junctions of the material is the same, the thermoelectric potential generated by the thermocouple will remain unchanged, that is, it will not be affected by the third metal in the circuit. Therefore,In the thermocouple temperature measurement, can be connected to the measuring instrument, measured after the thermoelectric potential, you can knowHot and cold shock test chamberThe temperature of the measured medium.

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