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Snap action, limit switches are special type of limit switches that are used mainly for applications in industrial, medical, and residential environments. These switches are usually operated by an external force, such as an electromechanical actuator or by a mechanical connection between two parts. The switches act as a bridge between two separate circuits, allowing one circuit to be operated while the other remains unchanged. They are designed to be used when precision and reliability are needed.

The working principle behind snap action limit switches is quite simple. The switch is designed to snap quickly and reliably into a certain position when it is activated. This snap-action is caused by a ramp-like device, with which the actuator begins to move from its rest position towards the switch contacts. As soon as the actuator is in the desired position, it is locked in place and remains until it is reset or released. This principle ensures that the switches do not overshoot the desired contact point and can reset or release quickly and reliably.

There are many different applications for snap action switches, such as in motor control systems, door or window safety, or temperature control systems. These switches provide a secure connection between two circuits and are often used to control the flow of power or to act as a sensor. For example, in motor control systems, snap-action switches can be used to control the speed of a motor, while in temperature control systems, they can be used to control the temperature of a room.

Other uses of snap action switches include in medical instruments, such as patient monitors and cryostats, as well as to control the pressure of ventilators and other medical devices. They can also be used in residential and commercial lighting systems, to control the power supply to a specific area, and to switch between different sources of power if required. In addition, these switches can be used in safety circuits, such as those found in elevators, to prevent excessive pressure from occurring or to ensure the safety of the user.

Snap action limit switches offer a range of features, such as long service life, high precision and reliable operation. In addition, they are often easier to install than other types of limit switches, and their simple design makes them ideal for most applications. This makes them an ideal choice for many industrial, medical, and residential applications.