The temperature and humidity transmitter is different from the dew point transmitter. The dew point transmitter refers to the temperature when the air is cooled to saturation under the condition that the water vapor content and the air pressure are not changed. It may also be said that it is in the air. The temperature at which water vapor turns into dew is called the dew point temperature. Dew point temperature is a temperature value, why can it be used to indicate humidity? This is because when the water vapor has reached saturation, the temperature is the same as the dew point; when the water vapor does not reach saturation, the temperature must be higher than the dew point temperature. Therefore, the difference between the dew point and the temperature can indicate the degree of saturation of the water vapor in the air. At 100% relative humidity, the ambient temperature is the dew point temperature. The lower the dew point is than the temperature of the surrounding environment, the smaller the possibility of condensation, which means that the drier is dry, the dew point is not affected by temperature, but it is affected by pressure, and the application is usually in container ships.
If the temperature of the outside air is lower than the internal temperature of an enclosed space such as a ship's cabin or container, the metal surface inside the vessel or container forms moisture. On the other hand, if the temperature of the outside air is higher than the internal temperature of the ship or the container, the moisture is formed directly on the surface of the cargo. In some cases, it may be necessary to ventilate the cabin to change the dew point temperature to avoid condensation. Then you need to install the dew point sensor.
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