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What is a wet bulb and dry bulb thermometer?

April 26, 2017bulb dry thermometer wet

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What is a wet bulb and dry bulb thermometer?

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The dry bulb temperature is the temperature of the air as determined by standard thermometer. The wet bulb temperature is determined by tying a wet wick over the bulb dipped in a reservoir containing distilled water. Airflow around the wick causes the evaporation of moisture, thus lowering the temperature and producing a reading lower than that on the dry bulb thermometer. The comparison between the two readings indicates the measure of water vapor in the air.