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Snap action limit switches are devices used in industrial automation and control systems for a variety of applications, ranging from simple on/off control to more complex applications that require exacting and repeatable positioning, such as in robotics. These devices are typically made from robust, weather-resistant materials and feature a range of adjustable and configurable features to meet a variety of application and environment requirements.

A limit switch is an electromechanical device designed to enable different types of systems to sense or detect a specific change in the position or displacement of an object. It uses an electrical output in the form of a switch contact to signal a change, or “limit”, in position or displacement. Typically, a limit switch consists of a hinged arm and a snap-action contact element, which closes a circuit when the object moves to a certain position. The switch is often connected to a relay or control system, and the contact activates or deactivates the system accordingly, initiating a response from the system.

Snap action limit switches are commonly used in industrial applications due to their robust design and reliable performance. These devices are typically used to detect the position of the moving part of a machine, such as a camshaft, or to detect the position of a machine component such as a valve. The snap-action design ensures that the limit switch contact is not affected by mechanical vibration or wear, meaning that the signal is reliable and consistent.

The snap action limit switch works as a two-stage device. Initially, there is a long and slow displacement of the switch arm as it is pushed against the moving object. Once the object reaches a certain position or displacement, the arm engages the snap action component and is converted into a rapid movement, producing an instantaneous output. This quick action allows the limit switch to accurately sense the position or displacement of the object, and to respond accordingly.

Another application of the snap action limit switch is in over travel applications. Over travel is defined as a resisted movement past a set point or limit. In these applications, the limit switch is connected to a mechanism that will prevent further motion past the set point. The snap action of the switch ensures that the mechanism is activated quickly, protecting the system from any potential damage from excessive motion.

Snap action limit switches are also commonly used for safety applications. These devices ensure the safety of personnel and equipment by providing signals that can be used to detect dangerous movement or position. The snap action of the switch can detect hazardous motion quickly and reliably, allowing the system to initiate corrective action to prevent harm.

Snap action limit switches are extremely reliable and robust, and can be used for a variety of applications. The snap action allows these devices to sense and respond to position and displacement accurately and quickly – ideal for industrial and safety systems. The wide range of features and flexibility of these switches makes them a versatile and cost-effective choice for any application.

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