Winter use of pressure sensors

Is a very cold winter season, as is the use of instruments in this special season need to be aware of. Including pressure sensor in winter use also need to pay attention to, winter freezing problems not only influence the accuracy of pressure sensor, also can cause the damage of the pressure sensor. So how should maintain pressure sensor does not winter damages to the pressure sensor? The following project is to introduce specific winter pressure sensor using the matters needing attention.

winter note is frozen on sensor damage is larger. Winter freeze occurs, according to the loading on the pressure sensor must adopt outdoor anti-freezing measures to avoid bring pressure inside the liquid due to the icing volume expansion, lead to the damage of sensors. Measuring pressure, the liquid sensor installation location should avoid the impact of the liquid, so as to avoid the sensor damage of overpressure. Wiring, the cable through the waterproof connector or round tube and screw down the sealing nut, such as in case of rain through the cable leakage into the transmitter inside the shell. Prevent scum deposition inside the duct, measuring pressure, the liquid pressure mouth should be open in the process piping side, in order to avoid precipitation product residue. Measuring gas pressure, the pressure mouth should be open at the top of the process piping, and the upper transmitter should be installed in the process, so that the accumulated liquid injection process pipeline easily. Guide pressure pipe shall be installed where the temperature fluctuations small; When measuring the steam or other high temperature medium, need to connect with buffer tube condenser, should not make the sensor operating temperature more than limit. To prevent the pressure sensor contact with corrosive or overheating of medium; Pressure sensor is installed correctly and protection can ensure that the application effect of pressure sensor.

in the winter some proper use pressure sensor according to the above methods, especially when the pressure sensor used in outdoor, if some local temperature is too low and we can add a freeze protection shell to sensor or cover, prevent the sensor is directly exposed to outdoor.

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