Many clients think photoelectric switch and the proximity switch is a thing, this is wrong, photoelectric switch and proximity switch has the very big difference. Although belong to sensors, their principle and application range are not the same. Let's say the difference between them.

Photoelectric switch and the difference between proximity switch testing way of the object, photoelectric switch by the modulation of the light tubes, receiving tubes to test whether to receive this kind of light to determine whether there are objects; And the proximity switch is to rely on their head detecting head induction to judge the existence of the object.

In the process of selection, what occasion with photoelectric switch, proximity switch to what situation? When detecting switch is not easy to close to the object or close to the tested object is easily damaged, under limited space, the object to be tested is small, can use photoelectric switch, it both metal and nonmetal. When testing switch is easy to close and not easy to be damaged, the object to be tested to detect metal objects using inductive proximity switch, detection of non-metallic objects using a capacitive proximity switch.

Photoelectric switch and proximity switch, of course, still have the same place, such as receiving tube based on the photoelectric switch receives the light source have to decide whether the switch action, it is divided into light and dark tong, according to the form of output circuit, photoelectric switch and proximity switch can be divided into PNP and NPN.