Attention in selecting temperature and humidity sensor
Temperature and humidity sensor refers to the temperature and humidity value in the air through the detection device, and the measured temperature and humidity value is converted into electrical signal or other required signal output according to a certain law, so as to meet the needs of users. The temperature and humidity sensors on the market generally measure temperature value and relative humidity value. How can you choose a good humidity sensor?
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Temperature and humidity sensor selection
1. According to their own field to determine the temperature and humidity sensor measurement range. Each industry because of the use of different environments, processes, so the temperature and humidity measurement range is different. Generally speaking, the meteorological or scientific research department of temperature and humidity requires a wide range of temperature and humidity. If the above two fields are not involved, the universal temperature and humidity sensor can be selected. Of course, the measurement range can be customized for the temperature and humidity sensor manufacturers according to their own actual situation.
2. According to their own needs to determine the temperature and humidity sensor measurement accuracy. The accuracy of a sensor and the same important area of measurement can be chosen according to their own requirements. For example, hospitals, refrigerated transportation and other industries have higher accuracy of temperature and humidity, while factories and manufacturing industries may not require such high accuracy. Of course, every one percentage point increase in measurement accuracy will greatly increase its requirements and grade, and the price will be different.
3. The time drift and temperature drift of temperature and humidity sensor should be considered. Because the temperature and humidity sensor needs to contact with water vapor in the atmosphere, the equipment will not be sealed. As a result, the service life and stability of the sensor will vary according to the environment, resulting in time drift, that is, the service life of the temperature and humidity sensor is generally 1 to 2 years. Temperature drift refers to whether the sensor can work normally and whether the measured data is normal in the temperature range of application, which is also a very important indicator.
4. Determine the appearance of the equipment according to the specific environment in which the equipment is used.