Requirements for wet ball gauze in constant temperature and humidity test chamber

During the humidity test of the constant temperature and humidity test chamber, some customers responded that the humidity display was 100%, and it may not reach the displayed value. When we do the humidity test, we need to pay attention to the placement of the wet ball gauze, otherwise it may happen that the humidity shows 100%.

The humidity display of 100% in the constant temperature and humidity test chamber is generally caused by the wrong placement of the wet ball gauze of the user, or it may be that the gauze does not meet the specifications. The wet ball gauze used in the constant temperature and humidity test chamber is not any gauze Can be substituted, it has certain requirements:

1. The relative humidity reading of the test chamber is based on the temperature and humidity difference, strictly speaking, it is also related to the local atmospheric pressure and wind speed at that time. The wet bulb temperature indication is related to the amount of water absorbed by the gauze and the evaporation of the surface. These are directly related to the quality of gauze.

2. The relevant regulations stipulate that the wet ball gauze must be a special "wet ball gauze" woven from flax, otherwise it is difficult to ensure the correctness of the wet bulb thermometer indication, that is, the correct humidity.

3. There are also clear regulations for the placement of wet ball gauze in the constant temperature and humidity test chamber: the length of the gauze is 100mm, the sensor probe is tightly wound, the probe is 25-30mm away from the humidity cup, and the gauze is immersed in the cup. Only in this way can the accuracy of humidity be guaranteed.

Requirements for wet ball gauze in constant temperature and humidity test chamber

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