Limit Switches Vs Proximity Sensor

The actuator is the part of the switch which physically comes in contact with the target.

Limit switches vs proximity sensor. Proximity sensors operate without any physical contact from the object itself. Sensor targets sense distance typ. Max switch rate typ. They re often used in manufacturing and robotics to keep processes running smoothly or in security to keep areas safe.

Max limit switch any 0 physical contact req d 3 hz mercury switch any 0 physical contact req d 3 hz reed switch magnet 20 mm 500 hz photo electric opaque 0 1 to 50 m depends on target shape 100 1000 hz. This makes them ideal for use in dirty or wet environments. Limit switches are contact switches. Proximity switches industrial automation by d w.

Prox switches are less sensitive to dust moisture moisture and oil than limit switches and their internal solid state circuitry makes them better suited for applications with high levels of vibration than the mechanical limit switches. Turck usa is a specialist in sensor fieldbus and connectivity products as well as interface technology human machine interfaces hmi and rfid systems. Due to the internal contacts the working life is relatively shorter. The difference between limit switch and proximity sensor.

Most limit switches contain the following functional parts in one form or another. In some limit switches the actuator is attached to an operating head which translates a rotary. Proximity sensors and switches 35 5 proximity switches sensor targets sense distance typ. Max limit switch any 0 physical contact req d 3 hz mercury switch any 0 physical contact req d 3 hz reed switch magnet 20 mm 500 hz photo electric opaque 0 1 to 50 m depends on target shape 100 1000 hz ultrasonic nonporous large.

Rarely a final operating device will be directly controlled by the contacts of an industrial limit switch but more typically the limit switch will be wired through a control relay a motor contactor control circuit or as an input to a programmable logic. Proximity sensors are non contact switches with a long life and are suitable for passing objects. Limit switches are used for position detection in one direction. Max switch rate typ.

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