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Snap Action, Limit Switches

Snap action limit switches are devices used for automatic opening and closing of electrical contacts. Such devices are widely used in various industrial settings. In particular, they are often used for controlling the position of automated machinery such as conveyor belts, Robots, Irrigation system motors and other related equipment. The range of application of such switches is immense and they are also used in several industrial processes such as monitoring the flow and level of liquids.

Snap action limit switches have a unique design which incorporates a pair of normally closed contacts that are separated by an insulated portion of the switch. When the switch is activated, the contacts become electrically connected and the resistance of the switch drops significantly. The design of snap action limit switches also allows them to be used in areas where high vibration or rapid motion is present.

The working principle behind a snap action limit switch is quite simple and involves mechanical rather than electronic or magnetic components. The switch contains a rotating plunger which engages with a set of cams and levers. When the plunger is depressed, the switch moves from an "on" position to an "off" position. The plunger then separates from the cams and levers, which causes the contacts to open and the circuit to be broken. At the same time, the plunger also moves back to its original position, completing its cycle.

Snap action limit switches are available in a variety of sizes and with various output characteristics. They are primarily used in industrial applications where reliability and repeatability are of paramount importance. Such switches are suitable for use in hostile environments such as high temperatures or high humidity and can be equipped with additional features such as a manual override, adjustable time delay, or a contact check system.

Snap action limit switches have become increasingly popular in recent years due to their remarkable durability, long life, and excellent reliability. The unique design of these switches ensures that they remain reliably in whatever position they are set. Furthermore, they are extremely cost-effective and require minimal maintenance.

In conclusion, snap action limit switches are used in many industrial applications and can provide reliable, consistent performance in a wide range of environments. They are extremely durable and require minimal maintenance, making them an ideal choice for most automated systems.

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