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Snap Action, Limit Switches

Snap action, limit switches are widely used in industries. They are typically robust and are used to detect the presence or absence of physical elements and/or objects. They are also used for many operations including position, overtravel, and actuation. Snap action, limit switches are often used in hazardous environments such as in the oil and gas industry because they are reliable in wet and extreme conditions.

Working principle

Snap action and limit switches use a contact or actuator to open and close a circuit. The contacts are usually on a pivoting armature or arm. Depending on the type of switch, the contacts will either be normally open or normally closed. When the switch is activated, such as when a lever is pressed or when a machine or vehicle is in motion, the arm or armature will move and either close or open the switch, allowing the current to flow through the resistance and device. Depending on the type of device, the contacts may be connected to the power source or the load.

Application fields

Industrial: The primary application for industrial snap action and limit switches are machine automation. They are commonly used to detect the presence or absence of an object in a process such as a machine part for a production line. They are also used to detect the presence of an object in a hazardous environment such as a machine part in the oil and gas industry.

• Transportation: Snap action and limit switches are widely used in transportation. They are used to detect the presence of objects or passengers in vehicles or on the tracks. They may also be used to detect the presence of an object on the tracks, such as a stalled train.
• Automotive: These switches are commonly used in the automotive industry for a variety of functions. They are used to detect the presence of an object in an engine compartment or on the hood, such as an oil leak. They may also be used to detect the presence of a passenger in a vehicle, the open/closed status of a door, or the presence of a pedestrian in the vicinity of a vehicle.

Snap action and limit switches are also used a variety of applications in household appliances, medical equipment, and optical scanning machines.

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