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Snap action, limit switches refer to switches that rapidly snap between two positions, or snap open and closed, when the motion is triggered by an applied force. Signals they generate can be used to send a message, control a process, or both. Their most common application field is, when crossed, the switch closes or opens an electrical circuit, making them an integral part of all types of automated control systems.

Types of Snap-Action, Limit Switches

Snap action, limit switches come in various types and styles, ranging from small to large, with contact points that provide various levels of force. Generally, they are comprised of two or more components, and are typically made up of a plunger, lever, or rolling ball. Depending on the contact point they use, some require a low force to actuate, while others require a much higher force.

Uses of Snap-Action, Limit Switches

Snap action, limit switches have a wide range of applications, from controlling large machines like industrial robots to small everyday items like a lamp switch. As an example, in manufacturing, snap action switches are used to detect the position of components on a bench, as part of an automated process. In the automotive industry, snap action switches are used to monitor the locations of vehicle doors, hoods, and trunks. They’re also used in motion control systems and as part of a safety system to prevent hazardous situations.

Working Principle of Snap-Action, Limit Switches

Snap-action switches are normally open contacts that close when the actuating element moves or deflects. When the actuating element returns to its normal position, the contacts will open again. Depending on the type of contact they employ, they can close one or multiple times before opening again. Some switches require an external force, such as a magnetic or mechanical force, to actuate them. Others are designed to operate when a mechanical load is applied, such as a machine pressing down on the switch.

Advantages of Snap-Action, Limit Switches

Snap-action, limit switches bring several advantages to automation processes, one being accuracy. They have been designed to function in almost any environment and to provide accurate, repeatable results time after time. They also require minimal maintenance, are resistant to wear and tear, and are relatively inexpensive. This makes them ideal for use in a variety of industrial applications.

Conclusion

Snap action, limit switches are reliable and versatile switching devices that are an excellent choice for automation processes. With their accuracy, durability, and ease of installation, they are an ideal component in a wide range of industrial applications. From controlling industrial robots to safety systems, they offer an efficient and economical solution to control problems.