83243005

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Snap Action, Limit Switches - 83243005

Snap action limit switches are devices that allow circuits to be opened or closed when an external force exceeds a predetermined set point. It is an electromechanical switch that is used in automation and control systems in home, industrial and commercial applications. The switch works by reactivating electrical contacts when the switch is pressed against an object. This action causes the contacts to either make or break electrical connections.

Application Field

The snap action limit switch is designed for applications that require a quick and repetitive action. These include HVAC, elevator control systems, conveyor belts, industrial robots and other automatic machinery. They are typically used as an input component in a system, and allow the electrical signal from the switch to commutate the circuit. Snap action switches can also be used in safety systems and theft deterrents, by providing an additional layer of security by controlling a light or sound alarm.

Its small size makes these switches ideal for applications where a precise and rapid reaction is desired but space may be limited. Snap action switches have also been widely adopted in the automotive industry for applications such as fuel economy or environmental monitoring.

Working Principle

The snap action limit switch works on the principle of forced contact. This means that, when the switch is pressed against an object, the contact is forced to close. The force at which the contact closes is determined by the switch\'s control mechanism, known as the actuator. This can be adjusted to ensure that the switch only reacts to the appropriate force or pressure.

The actuator can be a simple lever, toggle or roller, but can also contain a spring or plunger to provide an extra \'push\' to ensure that the contacts close. This ensures that the contacts will remain closed, even when a particular force is not applied.

When the electrical current flows through the switch, it causes a magnetic field to be created around the actuator, which in turn \'pulls back\' the contacts to their original position. This resets the switch, and allows it to be used again. In some cases, the actuator may be mechanical, such as a pressure-sensitive diaphragm or spring.

In order to ensure that the switch is reliable and does not become stuck in either the open or closed position, a \'snap action\' feature is added. This helps to ensure that the contacts remain closed, even when a slight force is applied. This also helps to limit any accidental or deliberate tampering of the switch.

Snap action limit switches are available in a variety of shapes and sizes, to suit the needs of different applications. They are also designed to be robust and long-lasting, ensuring reliable and consistent operation.

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