In all kinds of switches(proximity switch)
, there is a kind of element that has the ability to "perceive" objects close to it - displacement sensor. Using the sensitive characteristics of the displacement sensor to the approaching object to control the on or off of the switch, this is the proximity switch.
When an object moves to the proximity switch
and approaches to a certain distance, the displacement sensor will have "perception" and the switch will act. This distance is usually called "detection distance". However, the detection distance of different proximity switches is also different.
Sometimes the detected objects move to the proximity switch
one by one and leave one by one according to a certain time interval. Different proximity switches have different response ability to the detection object. This response characteristic is called "response frequency".