Principle: Inductive proximity switches use electromagnetic fields to detect metallic objects. When a metallic object enters the detection range, it induces a change in the electromagnetic field, triggering the switch.

Applications: Metal detection, position sensing in machinery, and object counting.

Principle: Capacitive proximity switches work based on changes in capacitance when an object (metallic or non-metallic) enters the sensor’s detection range. They are sensitive to the material properties of the object.

Applications: Level sensing in liquids, detection of granular materials, and presence sensing for various materials.

Principle: Photoelectric proximity switches use light beams (infrared or visible light) to detect the presence or absence of an object. When the beam is interrupted by the object, the switch is triggered.

Applications: Object detection, counting, and positioning in a wide range of industries.

Principle: Ultrasonic proximity switches use ultrasonic waves to detect the distance to an object. The time taken for the ultrasonic waves to return after hitting an object is used to determine the distance.

Applications: Distance measurement, presence detection, and liquid level sensing.

Principle: Magnetic proximity switches use magnets to detect the presence of ferrous objects. When a ferrous object comes into proximity, it influences the magnetic field, triggering the switch.

Applications: Door and window sensing, security systems, and machinery position sensing.