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Linear range
The linear range of the sensor is the range in which the output is proportional to the input. In theory, within this range, the sensitivity remains constant. The wider the linear range of the sensor, the larger its range and the ability to guarantee a certain measurement accuracy. When selecting a sensor, when the type of sensor is determined, it is first necessary to see if the range is satisfactory.
But in reality, any sensor can't guarantee absolute linearity, and its linearity is relative. When the required measurement accuracy is relatively low, within a certain range, the sensor with less nonlinear error can be approximated as linear, which will bring great convenience to the measurement.
Stability
The ability of a sensor to remain constant after a period of use is called stability. In addition to the structure of the sensor itself, the factors affecting the long-term stability of the sensor are mainly the environment in which the sensor is used. Therefore, in order to make the sensor have good stability, the sensor must have strong environmental adaptability.
Before selecting a sensor, investigate the environment in which it is used, select the appropriate sensor according to the specific use environment, or take appropriate measures to reduce the environmental impact.
The stability of the sensor has quantitative indicators. After the usage period, it should be recalibrated before use to determine whether the performance of the sensor changes.
In some applications where the sensor is required for long-term use and cannot be easily replaced or calibrated, the selected sensor is more stringent and must withstand the test of time.