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The difference between proximity switch and travel switch

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1. The proximity switch is a position switch that can be operated without direct mechanical contact with the moving parts. When the object is close to the sensing surface of the switch to the action distance, the switch can be moved without mechanical contact and any pressure, thereby driving DC appliances or provide control instructions to computer (plc) devices.

Proximity switch is a switch-type sensor (ie, non-contact switch), which has the characteristics of travel switch and micro switch, as well as sensing performance, reliable action, stable performance, fast frequency response, long service life, and anti-interference. Strong ability, etc., and has the characteristics of waterproof, shockproof, corrosion resistance and so on. Products are inductive, capacitive, Hall, AC, DC.

2. The limit switch is an electrical switch used to limit the movement limit position of mechanical equipment. Limit switches are of contact type and non-contact type. The contact type is more intuitive. The upper limit switch is installed on the moving parts of the mechanical equipment, and the limit block is installed on the fixed point of its relative movement, or the opposite installation position.

When the mechanical contact of the travel switch hits the stopper, the control circuit is cut off (or changed), and the machine stops or changes its operation. Due to mechanical inertial motion, this travel switch has a certain “overtravel” to protect the switch from damage. There are many forms of non-contact, such as dry reed switch, photoelectric type, induction type, etc., which can be seen in elevators. Of course there are many more advanced forms.

The two kinds of switches are generally used in the limit, but the two kinds of switches are different in the form of receiving signals and the use occasions.

The travel switch is the opening and closing of the internal micro switch generated by the object touching it, and the switch signal is generated. The proximity switch is made by an object (usually metal) approaching it, and the magnetic field around it is changed within a range to convert it into a switch signal.

Therefore, the two principles of opening and closing the meditation cause them to be used in different situations. Since the proximity switch does not need to touch the object, the lifespan will be longer when using it.

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Zhejiang SHUYI Electric Co., LTD, Focus on switches with 30 years.

An original factory of micro switch; foot switch; toggle switch; limit switch from China.

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