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The difference between the two types of humidity test standards in the constant temperature and humidity test chamber

Date: Dec 30,2021 Views: 227

             ——Dongguan Huanyi Instrument Technology Co., Ltd.

The common humidity test methods of the constant temperature and humidity test chamber are the wet and dry bulb method and the electronic humidity sensor method. The following Xiaobian Huanyi will introduce for you.

A. Humidity test of constant temperature and humidity test chamber:

1. The wet and dry bulb method: its advantage is that the maintenance is relatively simple. In specific applications, you only need to add water and remove the wet bulb on time.

Just change the wet ball gauze. Compared with the electronic humidity sensor, the wet and dry bulb method is not easy to cause embrittlement and reduces the precision and other problems. Therefore, the wet zone ball humidity measurement method is more suitable for applications in high temperature and extreme natural environments.

2. The electronic humidity sensor method for measuring humidity: it has only developed rapidly in recent decades. Humidity sensor manufacturers select standard humidity generators to calibrate the products one by one before leaving the factory. The accuracy of the electronic humidity sensor can reach 2%~3%RH. However, in specific applications, due to the influence of dust, oil stains and harmful substances, it will gradually age with the increase of time, and the precision will decrease. The annual drift of the humidity sensor will generally be ±2% or even higher.

B. The electronic humidity sensor is more suitable for applications in clean and normal temperature places. The precision level of the electronic humidity sensor should be distinguished by its long-term reliability. Generally speaking, the long-term reliability and service life of the electronic humidity sensor are not as good as the dry and wet bulb wet test method. This means that the manufacturer especially The reason why the wet and dry bulb method has been used.

Huanyi Instrument is a professional manufacturer of constant temperature and humidity test chambers, high and low temperature test chambers, high and low temperature humidity test chambers, etc. We will wholeheartedly provide you with the highest quality products and satisfactory services.




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