Integrated temperature sensor protection tube should pay attention to the problem

Integrated temperature sensor in use process often appear some problems, especially the protection tube temperature sensor, temperature sensor protection tube is used to protect the inside of the resistance, but the case also easy to cause the negative effect of the temperature sensor.

when installation, insulation deterioration and the introduction of integrated temperature sensor error such as thermocouple insulation, protection tube and wire plate too much dirt or salt slag between the thermocouple interelectrode and wall insulation fault, at high temperatures is more serious, which not only causes the thermoelectric potential loss but also can introduce interference, the resulting error sometimes can reach. Due to thermal inertia of thermocouple gauges behind the change of the measured temperature, indicating value of this influence is particularly acute in rapid measurement, so should be used as thermal electrode is small, small thermocouple protection tube diameter.

when temperature measuring environmental permits, even protecting tube can be taken. Integrated temperature sensor in use, usually USES the material with good thermal conductivity, thin, small diameter of the tube wall to protect casing, in the precision of temperature measurement, using unprotected casing bare wire thermocouple, thermocouple easy damaged, should be timely correction and replacement.

integrated temperature sensor is currently in use is more of a temperature sensor, the sensor is often has a protection tube, so we must pay attention to when using the installation of the protection tube and choices, or it will lead to inaccurate measurement and even damage the temperature sensor.

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