What are the characteristics of the sensor?

Discrete content, involving multiple disciplines, diverse types, mutual independence, knowledge-intensive, marginal disciplines, complex technology, high technological requirements, stable performance, strong environmental adaptability, wide application, diverse application requirements, strong vitality, difficult to leave the historical stage and diverse varieties. A sensor to be measured can be used. Due to the variety of sensors, the output forms are also varied. For example, although it is also a temperature sensor, the thermocouple outputs different voltages with the temperature change, the thermistor changes its impedance with the temperature change, and the bimetallic temperature sensor outputs switching signals with the temperature change. The output signals of sensors are generally weak, and the minimum output voltage of some sensors is only 0. 19V. The output impedance of the sensor is relatively high, which will cause great signal attenuation when the output signal of the sensor reaches the measuring circuit. The dynamic range of the sensor is very wide. The output of the sensor changes with the change of the input physical quantity, but the relationship between them is not necessarily linear proportional. The output of the sensor will be affected by the temperature, and the temperature coefficient will change.