Humidity sensor performance judgment method - Database & Sql Blog Articles

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In the case that the humidity sensor is actually difficult to calibrate, the humidity sensor performance judgment and inspection can be performed by some simple methods.

1. Consistency judgment, the same type, the humidity sensor products of the same manufacturer are best to buy more than two at a time. The more the more the problem is explained, the power is compared and the output value is compared. Under relatively stable conditions, the consistency of the test is observed. . 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 one day, such as high, medium and low, which can comprehensively observe the consistency and stability of the product, including temperature compensation characteristics.

2. Use the mouth to breathe or use other humidifying means to humidify the sensor, observe its sensitivity, repeatability, moisture and dehumidification performance, and resolution, the highest range of the product.

3. Test the product in both open and closed cases. Compare the consistency and observe the thermal effect.

4. Test the product in the high temperature state and low temperature state (according to the standard of the specification), and return to the normal state to compare the test with the pre-experiment record, check the temperature adaptability of the product, and observe the consistency of the product.

The performance of the product is ultimately based on the formal and complete testing methods of the quality inspection department. Using saturated salt solution for calibration, brand-name products can also be used for comparison detection. The product should also be subjected to long-term calibration during long-term use to judge the quality of the humidity sensor more comprehensively.