Sensor information energy conversion function of, is that it is based on the working mechanisms of various physical, chemical and biological effects, and governed by the relevant laws and rules. Understanding these laws and rules, can help us to the understanding of the sensor and to the development of new effect sensor. The home of the sensor with sensor work physical basis of the basic law and rule of classification:

Conservation law: including the law of conservation of energy, momentum, charge, etc, this law, is when we explore and develop new sensor. Or on the analysis of the existing sensor, integrated department must strictly abide by the basic law.

Field of the law: including the stadium's laws of motion, such as electromagnetic induction law. Interaction and the location and distribution state of object in space. Can generally be given by the physical equation. These equations can be used as a mathematical model of many sensors work. For example: using the law of electrostatic field of the capacitive sensor; Developed by using the electromagnetic induction law of self inductance, mutual inductance, the eddy current sensor; By using the laws of motion and the law of electromagnetic induction of the magnetoelectric sensor and so on. Use field of the law is composed of sensors, the shape, size (structure) determines the range of the sensor, the main performance such as sensitivity. Therefore, such sensors can be referred to as "structured sensor".

Material's law: it is said to the inner nature of a variety of material law, usually in this kind of material the inherent physical constant to describe. Therefore, the main performance of these constant depends on the size of the sensor. Such as: use of semiconductor material laws a pressure resistance, heat resistance, magnetic resistance, light resistance, moisture resistance, such as effect, respectively to make pressure sensitive, thermal, magnetic susceptibility, light and humidity sensitive sensors; Using piezoelectric crystal material laws - piezoelectric effect, piezoelectric, surface acoustic wave, ultrasonic sensor can be made, and so on. This is based on the material law of sensors, can be referred to as "property type sensor. This is the field of modern sensor technology has a broad prospects for development of sensors.

Statistical law: it is to put the micro system and macro system linked to the laws of physics. These rules, often associated with the working status of sensors. It is the base of analyzing some sensors, this research is yet to be step deep person.