Humidity means that the ball or jar below is full of two, so don't pass the thermometer from one side. Then read a temperature number on the left and a humidity number on the right, and there will be a difference. Then there should be a form on the back or in the manual, and you will know it as soon as you check the humidity.

How to read the dry and wet bulb thermometer?

What kind of watch did you buy? If it is old plastic, it should be the dry bulb temperature on the left and the wet bulb temperature on the right. There is a glass container at wet bulb temperature, which needs to be filled with pure water. Insert one end of the gauze into it and wrap the head of the wet bulb thermometer around the other end. At this time, the values read are the values on two thermometers, and the dry bulb temperature is the current ambient temperature. We can see the humidity by calculating the difference between dry bulb and wet bulb and looking up the table against the dry bulb temperature. There is a numerical wheel in the middle of the old model. The top row is the difference between dry bulb and wet bulb, and the leftmost column is the dry bulb temperature. These two values correspond to the current humidity. This thing has a big deviation, which looks ok, and the accuracy of temperature and humidity detection is much worse.

Wet and dry thermometer to see whether the actual temperature is dry or wet?

The wet and dry thermometer is a measurement of the ambient temperature. At the same time, it can measure the humidity of the environment.

Usually there are two pointers on it. One is a temperature pointer and the other is a humidity pointer.

How to treat the comparison table of wet and dry bulb temperature and humidity

The principle of wet and dry thermometer: evaporation of water absorbs heat. Dry and wet bulb thermometer is an instrument for measuring air temperature and humidity. Structure: It consists of two identical common thermometers, one for measuring air temperature, called dry bulb thermometer; The other is wrapped with gauze soaked in distilled water, and the lower end of gauze is soaked in distilled water, which is called wet bulb thermometer. Because the gauze wrapped by wet bulb thermometer absorbs water, evaporates and absorbs heat, the reading is smaller than that of dry bulb thermometer. Wet ball gauze often needs a new one. When the air is dry, the gauze of wet bulb thermometer evaporates quickly and absorbs more heat, so the difference between the two thermometers is quite big. The greater the difference between the two thermometers, the drier the air is. When there is a lot of water vapor in the air, the gauze of wet bulb thermometer evaporates slowly and absorbs less heat, so the difference between the two thermometers is small. The smaller the difference between the two thermometers, the wetter the air.

How to treat dry-wet thermometer

Read the dry bulb temperature and wet bulb temperature respectively, and check the relative humidity on the hygrometer according to the difference.

If it is a control type with a turntable. Relative humidity can be obtained by corresponding to the values of temperature and humidity respectively.