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Snap Action, Limit Switches

A LCGHX1T23JC snap-action, limit switch is a broad term that covers any type of mechanical operation—usually to open or close an electrical circuit—triggered when particular materials enter into contact. They are mostly used as safety devices, and are usually attached to a fixed point, at which they will be held in the open or closed position.

Application Field

Snap-action, limit switches are widely used across a number of industries and have a myriad of applications. For example, they are frequently used in the automotive industry to control fuel flow, while they can be found in the manufacturing industry to ensure robots won\'t continue to operate if there is an interruption of power.

Outside of the industrial sector, snap-action, limit switches are used for domestic purposes too. One common household example is the control switch for a lamp or a fan.

Working Principle

In essence, a snap-action, limit switch works by mechanically separating two contacts apart when an actuating force is applied to them, which works by moving a diaphragm or plunger. It is triggered by a predetermined maximum force or other parameter.

Let’s take one particular type of switch—the reed switch—as an example. This switch is operable through the use of an electromagnet. When the appliance is switched on, an electromagnet moves a permanent magnet that is located inside the switch and causes it to close or make contact. When the trigger switches off, the magnet releases its hold and the switch opens again.

Snap-action, limit switches operate similar to a spring-loaded switch, except that the switch is triggered at a set or defined force instead of being actuated through the use of a lever. Most devices have an adjustable function, which can be used to vary the set force they trigger at.

Since current flowing through the switch passes between two contacts, its functionality is important. If the contacts become dirty or corroded, their effectiveness may decrease and eventually cause an interruption or malfunction. Therefore, electrical contact cleaning is often an important part of a switch’s maintenance.

Conclusion

In conclusion, snap-action, limit switches are incredibly versatile tools that have many applications across a wide range of industries. The working principle of a snap-action, limit switch is the result of the opening or closing of two or more contacts when an actuating force is applied. Cleaning electrical contacts is essential for the switch’s proper functioning; regular maintenance must be performed in order to ensure the device has an optimal lifespan and works correctly.

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