Supply Put 272-1 iron shell dry and wet thermometer Beijing dry and wet thermometer

-Wet and Dry Thermometer with Iron Case Wet and Dry Thermometer in Beijing Wet and Dry Thermometer with Iron Case Wet and Dry Thermometer Manufacturer and Wet and Dry Thermometer with Iron Case Price Wet and Dry Thermometer with Iron Case Content Introduction:
Wet and Dry Thermometer with Iron Case d produced by Beijing Pute Instrument Complete Set Factory - -d> is an instrument for measuring temperature and humidity. It consists of two identical ordinary thermometers. One is used to measure the air temperature and is called a dry bulb thermometer. The other is a wet bulb thermometer. The lower end of the gauze is wrapped with gauze soaked in distilled water and immersed in distilled water.
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-:dd- -d>According to the measured dry bulb temperature and wet bulb temperature>check wet bulb > degree, the degree difference > the vertical column of degree crosses the horizontal bar of dry bulb > degree > degree means the moisture is >%.
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-:dd- -d>The state changes of air heating, cooling, humidification and dehumidification can be calculated by comparing the measured values with the humidity air line diagram.
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- . dd d -:d -- . d - -d>Characteristics of wet and dry thermometers
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d- - d> Human beings invented the wet and dry thermometer as early as the > century
d- -d> Wet and dry thermometer
d- -d> The accuracy of the wet and dry hygrometer also depends on the dry bulb and wet bulb thermometers themselves. The precision hygrometer must be in a ventilated state: the specified accuracy can only be achieved when the gauze water jacket, water quality, and wind speed all meet certain requirements. The accuracy of the wet and dry bulb hygrometer is only >% to >%r.
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- . dd d -:d -- . d - -d>Principle of wet and dry thermometer
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d- -d> The dry-bulb probe of the wet-dry thermometer is directly exposed to the air, and the wet-bulb temperature probe is wrapped with wet gauze. The principle of humidity measurement is that the water in the wet gauze outside the wet bulb evaporates under a certain wind speed. The heat on the wet bulb thermometer probe is taken away to make the temperature lower than the temperature of the ambient air. What the dry bulb thermometer measures is the actual temperature of the ambient air. At this time, the temperature difference between the wet bulb and the dry bulb has a relationship with the relative humidity of the environment. Corresponding relationship but the relationship is non-linear. It's quite complicated to express in a formula. The relationship between the two will be affected by many factors, such as: the accuracy of the anemometer itself, the atmospheric pressure, the bulb surface area of the wet and dry bulb thermometer, the size of the gauze material, etc.
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-:dd- -d>Relative humidity>=water vapor partial pressure>/saturated vapor pressure (under constant pressure and temperature)
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-:dd- -d>When the dry bulb temperature is constant, the greater the difference between the two thermometers (difference between dry and wet), the drier the air is.
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-:dd- -d> Note: Because the wet and dry bulb thermometer is an indirect method of measuring humidity, the conditions for using the equation must meet: the wind speed near the wet bulb reaches >./ or above.
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