Sensor basic tutorial knowledge-5
Sensor selection
Sensors vary widely, and sensors of different operating principles can be used for the same type of measurement. Therefore, the most suitable sensor should be selected as needed.
(1) Measurement conditions
If the sensor is misselected, the reliability of the system will be reduced. To this end, from the overall consideration of the system, to clearly understand the purpose of use and the need to use sensors, never use unsuitable sensors and unnecessary sensors. The measurement conditions are listed as follows: measurement purpose, selection of measurement quantity, measurement range, bandwidth of input signal, required accuracy, time required for measurement, and frequency of occurrence of over-input.
(2) Sensor performance
When selecting a sensor, consider the following properties of the sensor, namely accuracy, stability, response speed, analog signal or digital signal, output and its level, the influence of the characteristics of the measured object, calibration cycle, and over-the-counter protection. For example, WBI414N95 is analog signal output and WBDJS5119 is digital signal output.
(3) Sensor usage conditions
The conditions of use of the sensor are the location of the installation, the environment (humidity, temperature, vibration, etc.), the time of measurement, the distance between the signal transmission with the display, the connection method with the peripherals, and the power supply capacity.
