Limit Switches Vs Proximity Sensor

Most limit switches contain the following functional parts in one form or another.

Limit switches vs proximity sensor.

Limit switches are contact switches. Choose from our selection of dc metallic object proximity switches sensor and switch mounting brackets ac metallic object proximity switches and more. 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.

This makes them ideal for use in dirty or wet environments. Max switch rate typ. 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. In some limit switches the actuator is attached to an operating head which translates a rotary.

Proximity switches industrial automation by d w. In stock and ready to ship. Due to the internal contacts the working life is relatively shorter. The actuator is the part of the switch which physically comes in contact with the target.

The class of proximity switches operates by the disturbance of an electromagnetic field by capacitance or by sensing a magnetic field. Turck usa is a specialist in sensor fieldbus and connectivity products as well as interface technology human machine interfaces hmi and rfid systems. The difference between limit switch and proximity sensor. Limit switches are used for position detection in one direction.

Max switch rate typ. As i know limit switch is generally the switch which we can operate by physical touch or contact proximity switch is like it uses the proximity sensor which can operate from the limited distance when it sense the object in its pridefine range. Proximity sensors operate without any physical contact from the object itself. 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. 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. Cylindrical proximity sensors and switches use infrared acoustic capacitative or inductive means to detect objects and will open or close the electrical circuit if the object is within a certain distance.