WebseoChina2014

The humidity forecast is mostly relative humidity, such as 100% here. 100% means that 100% of the water vapor can be contained in the air. If water vapor enters the air, it will condense into water. The upper limit of how much water vapor can be contained in the air is affected by temperature. The higher the temperature, the faster the water vapor molecules move and the less likely they are to condense. The air can hold more water vapor without condensation. So water vapor of the same quality in the air is easy to condense in winter and not easy to condense in summer. This is why white fog can be blown out in winter but not in summer. The relative humidity shows how far the current water vapor content is from this upper limit. When the relative humidity is low, it means that the air is unsaturated and can absorb more water. At this time, the water is more likely to evaporate into steam. When the relative humidity is close to...

There are three kinds of temperature and humidity meters commonly used: 1.the electronic temperature and humidity meter determines the humidity according to the electrical conductivity of the humidity sensitive resistor or humidity sensitive capacitor at different humidity. 2. mercury or alcohol thermometer , the humidity is measured by a thermometer with double glass tubes, one of which has a volatilizer at the bottom, which should be provided with water during normal use to keep the evaporator moist. This kind of error is still very small, and the price is very cheap. 3. the dial thermometer works on the principle that two different metals have different degrees of expansion when the temperature changes. Generally speaking, the electronic one is more accurate than that of the dial. The electronic household temperature and humidity meters all use thermal resistors and humidity resistors. The household-level temperature and humidity meters have an ac...