Limit Switch Reliable, Long Life

Usually order the trip switch, limit switch, proximity switch is just a name? Whether there is a slight difference between the three of them, and this small difference will affect our selection? Do you really know?

Limit switch: can be installed in the relatively stationary objects (such as fixed frame, door frame, etc., referred to as still life) or moving objects (such as traffic, doors, etc.) on. When the object is close to still life, the contact of the switch's drive switch causes the closed contact to break or break the contact closed. By the switch contact opening and closing state changes to control the operation of the circuit and the mechanism. Limit switch can also be divided into rotary limit switch and straight limit switch.

Stroke switch: is a displacement of the object to determine the circuit on and off the switch, trip switch and limit switch are position switches, but the trip switch can detect the trip, as the input signal control circuit at a certain distance action.

Proximity switch: Proximity switch, also known as non-contact travel switch, it can be completed in addition to stroke control and limit protection, or a non-contact type of detection device for the detection of parts size and speed, etc., can also be used for frequency counter, Variable frequency pulse generator, liquid level control and automatic connection of processing procedures. Features Reliable, long life, low power consumption, high accuracy of complex positioning, high operating frequency and adapt to the harsh working environment. Performance characteristics in all types of switches, close to its objects have "perception" ability components.

The difference between the three:

1. The proximity switch is a non-contact switch with a longer life and is suitable for "signal".

2. Limit switch (also known as trip switch) is a contact switch, suitable for single-position detection, due to contact, relative life is shorter.

3. The trip switch, also known as the limit switch, limit switch and limit switch are position switches, but the trip switch can detect the trip, can be used as input signal control circuit at a certain distance action. Different from the limit switch detection limit position of the signal, from the stop, the role of protection.

Limit switch, proximity switch Two kinds of positioning switches are commonly used in the equipment industry switch, depending on the scene there are different options. Now compare their strengths and weaknesses to do:

Proximity switch: No need to touch the detection object, the use of electromagnetic induction caused by the detection of objects in the body of the eddy current generated by the way to detect the object, such as HWL HTL-Q05N1E is the use of the principle to see the detection of ferromagnetic objects, detection distance 5MM , 10-30vdc power supply.


1, non-contact, so it will not wear and damage the detection object.

2, the use of non-contact output, so life extension, the use of NPN / PNP output, the impact of the contact life.

3 is not affected by the detection of objects and oil, water, etc., only the ferromagnetic induction.

4, high-speed response up to 3KHZ

1, no matter what kind of material, as long as the contact with the operating force to a certain value, starting the switch.

2, the use of contact output, with the external voltage can be different output, no leakage phenomenon.

3, independent of the impact of the sensor, the output is stable.