Several methods for preliminary judgment of humidity sensor performance
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1. Consistency determination: The same type, the same manufacturer of humidity sensor products is best to buy more than two at a time, more and more explain the problem, put together to compare the test output power, under relatively stable conditions, observe the test consistency . If it is further tested, it can be recorded at intervals of 24 hours. Generally, there are three kinds of humidity and temperature conditions in a day, which are high, medium and low, which can comprehensively observe the consistency and stability of products, including temperature compensation characteristics.
2. Moisten the sensor by mouth or using other means of humidification to observe its sensitivity, reproducibility, wet and dry desorption performance, resolution, and the maximum range of the product.
3. Test the product in both open and closed boxes. Whether the comparison is consistent or not, observe the thermal effect.
4. Test the product at high temperature and low temperature (according to the specification standard), and return it to the normal state for comparison with the record before the test, examine the temperature adaptability of the product, and observe the consistency of the product.
The performance of the product must ultimately be based on the formal and complete testing methods of the quality inspection department. The use of saturated salt solution for calibration, can also use brand-name products for comparison testing, the product should also be long-term use of long-term calibration in order to more fully determine the quality of the humidity sensor.