What do limit switches, travel switches and proximity switches do?

Travel switch, limit switch, proximity switch function is very near, but there are some subtle differences between them, today to learn, what are the differences between these three.

Limit switch: can be installed on relatively static objects (such as fixed frame, door frame, etc., referred to as still life) or moving objects (such as driving, doors, etc.). When the object is near the still life, the connecting rod of the switch drives the switch contact to cause the closed contact to break or the broken contact to close. The action of the circuit and organization is controlled by the change of the opening and closing status of the switch contacts. Limit switches can also be divided into rotary limit switches and straight limit switches.

Travel switch: is a switch by the displacement of the object to decide the circuit off, travel switch and limit switch are azimuth switch, but travel switch can detect travel, can be used as an input signal control circuit in a certain distance.

Proximity switch: Proximity switch is also called contactless travel switch. In addition to finishing stroke control and limit maintenance, it is also a non-contact detection device, used for detecting parts size and speed, and can also be used for frequency conversion counter, frequency conversion pulse generator, liquid level control and active connection of processing program. It is characterized by reliable operation, long service life, low power consumption, high complex positioning accuracy, high operating frequency and poor working environment. In various types of switches, a device that has the ability to "sense" objects that are near it.

The differences among the three:

1. Proximity switch is contactless switch, long life, suitable for "through signal".

2. Limit switch (also called travel switch) is a contact switch, suitable for single-direction azimuth detection, because of the contact, the relative life is short.

3. Travel switch, also known as limit switch, travel switch and limit switch are azimuth switch, but travel switch can detect travel, can be used as an input signal control circuit in a certain distance. Different from the limit switch detection limit azimuth signal, start stop, maintenance effect.