What is the difference between photoelectric switch and proximity switch

(a) What is the difference between a photoelectric switch and a proximity switch The difference between a photoelectric switch and a proximity switch lies in the way the object is detected. When selecting a model, when should a photoelectric switch be used and when should a proximity switch be used?

(b) When the detection switch is inconvenient to approach the detection object, or when it is easy to be damaged when it is close to the detection object, when the space is limited, or when the detection object is small, the photoelectric switch can be used. It does not distinguish between metal and non-metal. It should be noted that the switch is determined according to whether the photoelectric switch receives the light source or not. It is divided into light-on type and dark-on type. According to the form of the output circuit, it is also divided into pnp type and npn type;

(c) When the detection switch is convenient to approach the object to be measured and is not easily damaged, the inductive type is used to detect metal objects, and the capacitive type is used to detect non-metal objects. According to the form of the output circuit, it is also divided into pnp type and npn type;

(d) Some detection switches also have knobs for adjusting sensitivity;