Wet and dry bulb moisture of the wet method and the electronic type humidity sensor test comparison

Humidity refers to the relative humidity in everyday life, with RH % said. Is the gas ( Usually refers to the air) The water steam ( Water vapour pressure) And its saturated vapor quantity air the same situation, Saturated water vapor) The percentage of. Long before they found the humidity and has close relation with the production and living, so people have been looking for measuring humidity, the method of modern measuring humidity measurement methods mainly include wet and dry bulb wet and wet electronic humidity sensor test. Wet and dry bulb hygrometry is a kind of simple and with more measurements, in use, as long as to wet bulb regularly add water and wet gauze ball of replacement. And wet and dry bulb hygrometry won't produce the problem such as aging, precision drop, this characteristic determines the wet method is suitable for high temperature and wet bulb test environment is bad situations. Compared to relatively old wet, wet and dry bulb test electronic humidity sensor hygrometry young a lot, it is in recent decades, especially developed in recent 20 years. Its accuracy can reach 2% 3% rh。 In use, because of the effect of the dust, oil pollution and harmful gas, use a long time, aging occurs, falling problems such as accuracy, thus requiring calibration on a regular basis. These characteristics determine electronic humidity sensor is only applicable to clean situations as well as the temperature is moderate. Through the above comparison, found that two methods strengths, so when the choice must pay attention to the use of occasions, try to be accurate measurement and not waste.