Sensor Guides

WHAT IS A DEW POINT SENSOR?

Written by plc247.com

Dew point sensor or Dewpoint sensor is a specialized sensor to detect the phase change state between gas phase and liquid phase, then dew point temperature is the temperature when water vapor condenses into water droplets at which the pressure is constant.

Dew point temperature is the temperature of the air when it is saturated with water vapor in the air, dryer. Dew point temperature is measured in units of Td. The lower the dew point temperature, the lower the humidity in the air and the drier the environment.

The temperature of the dew point will let us know the humidity of the air and the environment. Also from the temperature of the dew point, you have solutions to maintain the humidity of the air at the appropriate level.

In industry, maintaining the appropriate level of air dryness is extremely important, especially for electrical systems and automation systems. Determining the dew point temperature will ensure that machinery and equipment do not have problems during operation, limiting the phenomenon of water moving into the machinery (condensation) causing unexpected problems. Thus, it can be seen that determining the dew point temperature and controlling it is extremely important in factories and production workshops.

The dew point sensor can measure and output the values ​​of dew point, air humidity, temperature in the form of Modbus RS-485 communication signals or 4-20ma analog signals displayed directly on the sensor screen or transmit control monitoring signals through controllers such as PLC or Controller.

Most of the current dew point measuring devices have very high resolution that can detect extremely small dew points. In addition, the dew point sensor can compensate for temperature to give the most accurate result. The dew point sensor usually operates in a temperature range of -20 to 50 degrees Td.

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