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The characteristics of the temperature instrument of temperature sensor

2021-01-06

JVTIA

211

Temperature sensor in the medical, oil, electric power, aviation, agriculture and other fields has a certain application. Thermocouple and thermal resistance is a kind of temperature sensor, is an instrument used to measure the temperature. Users in the use of time for the characteristics of temperature sensors have to know?

today engineering to detailed introduce for everybody.

a, signal, the properties of heat resistance itself is resistance, the change of the temperature, the thermal resistance produce positive or negative resistance changes; And thermocouple, it is the change of the induced voltage, he along with the change of temperature change.

2, two kinds of sensors to detect temperature range, thermal resistance test 0 ℃ - in general The temperature range of 150 ℃, the highest measurement range can be up to about 600 ℃ ( Of course can detect negative temperature) 。

3, from material, heat resistance is a kind of metal material, is sensitive to temperature changes of metal materials, thermal coupling is bimetallic material, both of two different metals, due to the changes of temperature, in two different electric potential difference at both ends of the wire.

4, PLC corresponding thermal resistance and thermocouple input module is also different, this sentence is no problem, but the general PLC are directly connected to the 4 ~ 20 ma signal, and the thermal resistance and thermocouple are generally transmitter to access with a PLC. If access to DCS don't have to use the transmitter! Thermal resistance is RTD signals, thermocouple is TC signal!

5, PLC also has the thermal resistance and thermocouple module, which can directly input resistance and thermocouple signals.

thermocouple J, T, N, K, S and other models, there are more expensive than resistance, there are also cheaper than resistance, compensation conductor, but on the comprehensive cost of the thermocouple is high.

more high-quality sensors at https://www. rtdcn。 Com /

key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure sensor and digital temperature sensor

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