How to choose a reed switch

How to choose a reed switch?

The main function of the auto reed switch is to check the operation of the cylinder piston so that the piston rod can be fixed and stopped at a certain position. It is usually used in conjunction with a solenoid valve to detect the position of the cylinder and complete the movement of the cylinder. It has the following characteristics:

① Strong versatility, suitable for a variety of pneumatic cylinder types.

② High sensitivity, small size, fast response, long life.

③ Easy to install, no noise, and equipped with LED indicator.

  1. Working Principle

When the cylinder’s magnetic ring moves close to the reed switch, the magnetic reed of the magnetic switch will be sensed, causing the electric shock to close and generating an electrical signal.

When the magnetic ring leaves the induction switch area, the magnetic reed loses its induced magnetism, causing the electric shock to disconnect and the electrical signal to disappear. 

In this way, the position movement of the cylinder piston can be checked, thereby controlling the corresponding solenoid valve action.

 

  1. Types of magnetic switches

Contact type magnetic reed switch

                

Contactless electronic switch

 

 

  1. Factors to consider when selecting a reed switch

*The premise of using a magnetic switch is that it must be used with a magnetic cylinder, that is, the piston has a magnetic ring.

  1. Safety inspection

① Since the magnetic switch is often in working condition, regular maintenance and inspection are required to prevent the switch from malfunctioning.

② Check the working environment of the magnetic switch and keep the environment dry and at normal temperature.

③ Check whether the wire is damaged. Damage to the wire will cause poor insulation or wire breakage. If the wire is found to be damaged, the switch should be replaced or the wire should be repaired.

④ Tighten the small screws of the induction switch to prevent the induction switch from loosening or shifting; if it has shifted, it should be readjusted to the correct position and then tightened.

 

Of course, in addition to being used with magnetic switches, the air cylinder can also be connected with a variety of other accessories to achieve different functions and enhance performance, such as pneumatic cylinder accessories, solenoid valves, speed control valves, connectors, etc.

Supplementary content

Magnetic Switch VS Proximity Switch

The above is about how to choose a reed sensor and the difference between a magnetic sensor and a proximity sensor. If you have any other questions, please contact VPC. We will be happy to provide you with more professional help in pneumatics.