Linear Limit Switches

Linear limit switches are electromechanical devices that require physical contact between a target object and switch activator to make the contacts change state. There are two basic types of linear limit switches. Momentary or spring return switches return to their normal state as soon as the actuator passes its release point. By contrast, maintained contact switches remain in the triggered position after the actuator is released and are reset only by further mechanical action of the operating head. Most linear limit switches feature a rugged design and are suitable for a variety of industrial applications; however, because these devices contain mechanical parts, they wear over time. Typically, linear limit switches are slower than noncontact, electrical devices such as proximity sensors and photoelectric sensors. Common actuation methods include pushbuttons, plungers, standard levers, roller leavers, and adjustable levers. Top-mounted devices position the actuator on the top of the limit switch. Side-mounted devices locate the actuation mechanism on the side.

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