The proper use of humidity sensors
The humidity sensor has the advantages of high precision, easy to use, good linearity and simple operation. It has important application in industrial and agricultural production, meteorology, environmental protection, national defense, scientific research and aerospace. However, in the course of use, due to the characteristics and limitations of the humidity sensor itself, we need to use the correct to ensure the accuracy of the humidity sensor measurement results. Here we introduce the correct use of humidity sensors:
1, the humidity sensor is non-sealing, in order to protect the measurement accuracy and stability, should be avoided in acidic, alkaline and organic solvents used in the atmosphere. Also avoid the use of dust in the larger environment. In order to properly reflect the humidity of the space to be measured, the sensor should also be placed at a point close to the wall or where the air is not circulated. If the measured room is too large, you should place more than one sensor.
2, some of the humidity sensor on the power supply requirements are relatively high, otherwise it will affect the measurement accuracy, or mutual interference between the sensors, or even can not work. When used in accordance with the technical requirements to provide appropriate, meet the accuracy requirements of the power supply. When the sensor needs to carry out long-distance signal transmission, pay attention to the signal attenuation problem. When the transmission distance is more than 200m, it is recommended to use the frequency output signal humidity sensor.
3, due to the existence of a certain degree of dispersion of humidity components, regardless of imports or domestic sensors are required to be commissioned by the calibration. Most of them need to be re-calibrated after replacing the humidity sensor, which is especially important for humidity sensors with high measurement accuracy.
