A photoelectric sensor is a device used to determine the distance, absence, or presence of an object by using a light transmitter, often infrared, and a photoelectric receiver.

Photoelectric Sensors detect targets based on the change in the intensity of reflected or interrupted light. This page introduces their principles, major types, and how to select based on need.

Jul 23, 2025 · A photoelectric sensor is a type of sensor used to detect the presence or absence of objects, as well as to measure distance, based on the principle of light reflection or interruption.

Through the use of a low hysteresis circuit, the sensor detects small changes in light typical when sensing clear objects. The clear object detector used polarized filters on both the transmitter and …

Verifying that you are not a robot...

These Sensors operate on the principle that an object interrupts or reflects light, so they are not limited like Proximity Sensors to detecting metal objects. This means they can be used to detect virtually …

Explore how photoelectric sensors detect objects using light. Learn about the different types—through-beam, retroreflective, and diffuse—and how they work in automation systems.

The sensors are equipped with polarizing filters over the lens so light waves are oriented in one direction only. The reflector rotates the light waves to match the orientation of the filter on the receiver.

Aug 9, 2023 · By reflecting light onto an object to be detected, the presence or absence of the object can be detected. Analog output type and digital type with I²C interface are available.

Photoelectric sensors detect presence of an object without contact, using light reflection. They make an output signal according to an amount of received light that is reflected from a detection target.