The proximity switch, also known as the non-contact stroke switch, is a non-touch detection device besides completing the stroke control and limit maintenance. It can also be used for measuring the size and speed of parts, as well as for the automatic connection of frequency conversion counter, frequency conversion pulse generator, liquid level control and processing sequence. It features reliable operation, long service life, low power consumption, high precision of multiple positioning, high operation frequency and adapting to harsh working environment.

I. Performance characteristics of proximity switches

Among all kinds of switches, there is a displacement sensor, which has the ability to "perceive" the objects close to it. Using the sensitivity of the displacement sensor to the object near to reach the intention of switching on or off of the control switch, this is the proximity switch.

When there is an object moving close to the switch and close to a certain interval, the displacement sensor will have "perception" and the switch will act. Generally, this interval is called "detection interval". Different proximity switches have different detection intervals.

Sometimes the tested object moves one by one to the nearest switch at a certain time interval, and then separates one by one, so it repeats continuously. Different proximity switches can respond differently to the detected target. This echo characteristic is called "echo frequency".

1. Action interval close to switch

1) The action interval close to the switch is related to the raw material of the detected body. Under the same thickness and induction area, the relationship between the action interval is S iron > S stainless steel > S brass > S aluminium > S copper.

2) The action interval close to the switch is bound to be related to the thickness and area of the detected body (together with the raw material of the detected body).