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Snap action and limit switches are used in many industrial and commercial applications, ranging from temperature monitoring in pharmaceutical processes to boundary detection in precision industrial automation. These switches are highly reliable and are able to detect very small changes in the environment. They are used to detect the presence of an object, to control the speed of an object, and to provide an indication of the presence of an object when used in combination with a sensor. In some cases, they can also be used as safety devices to prevent the onset of dangerous conditions or to shutdown a machine when a critical limit is exceeded.

Snap action switches are known for their reliable, repeated switching of a circuit in response to a physical stimulus such as an electric current, mechanical pressure, temperature, or presence/absence, liquid level. Generally, snap action switches are designed to operate at a couple of milliseconds, or at least a few cycles of an operating system, and are designed to snap or snap back, which helps to provide a quicker reaction time for the circuit.

The working principle of snap action and limit switches is called latching or snapback. This is where the energising force of the switch is weakest, and the switch will only move in one direction (opening or closing the contacts). A latching force is used to keep the switch in its current position, while the opening and closing process is completed quickly and accurately under the influence of an energising force. The latching force is strong enough to hold the switch in position, yet weak enough to allow for fast disengagement.

In a typical application, the snap action or limit switch is placed in a specified area, with a contact point that can be triggered by the presence or absence of an object. When an object such as a finger, hand, tool, or part passes by the contact point, the switch is activated and the circuit opened or closed. Depending upon the type of application, the snap action or limit switch can be used to either open the circuit, close the circuit, or provide an indication of the presence of an object when wired in combination with a sensor.

Snap action and limit switches offer many benefits, including quick actuation and comprehensive, automatic switching control. These switches are designed for reliable, repeated and instantaneous switching of electric circuits. They provide high-accuracy and repeatability for a wide range of applications, and a wide range of operating temperature ranges. They can be used to detect the presence of an object, control the speed of an object, and provide an indication of the presence of an object when combined with a sensor.

Snap action and limit switches are used in many different industries, from simple DIY projects to complex industrial automation systems. They are designed for reliable and repeatable switching of electric circuits and are ideal for applications such as temperature monitoring in pharmaceutical processes, boundary detection in precision industrial automation, control of electrics to prevent the onset of dangerous conditions, or to provide an indication of the presence of an object when used in combination with a sensor.

Snap action and limit switches offer fast, reliable and accurate switching control, and are used in a wide range of applications. They are vital components in the industrial and commercial world, providing a safe and reliable means of monitoring and controlling everything from temperature to pressure. Snap action and limit switches are the most basic and reliable way to make sure that machines, processes and personnel remain safe, secure and efficient.