The photoelectric sensor is a generic name for sensors that detect an object by using light. The optical signal transmitted from the emitting part of the sensor is modified by being reflected, transmitted, absorbed, etc., by the sensing object and...

Proximity sensors are sensors that detect when a target object such as a metal has approached (or receded), without making direct contact with the object. Principle of high-frequency oscillation type: The detection coil located at the front end of the...

An electrical field is created between 2 electrodes on the front face of the sensor. These electrodes constitute a capacitor with a capacitance of C = e0 * er * A/d. When an object of any material (er > 2)...

The beam from the transmitter limb is transmitted to the receiver limb. Due to its construction, only one connection is required as opposed to two for a traditional through-beam function.The transmission sources are LEDs of various technologies: 1) Infrared, particularly...