photoelectric sensor is a commonly used tool for measuring properties like surface conditions and detecting objects through emitting and receiving light. By the means of an emitter, photoelectric sensors cast light on the objects they sense. In turn, the object interrupts or reflects the light to a receiver, which detects the difference in light emitted versus received to create an electrical output. This output can be used across a myriad of applications to measure different variables in different ways. As photoelectric sensors are highly versatile and complex, this blog will provide an overview of their basic types and functions so you can better understand the significance of these popular devices.

Before we dive into the specifics of the various functions of photoelectric sensors, it is helpful to understand why photoelectricity works well for sensors. While proximity sensors and other devices may also be used to detect objects and surfaces, they are limited in their ability to detect certain objects like metals. On the other hand, photoelectric sensors have virtually no restrictions on the objects they are able to sense and some have the ability to detect objects up to 10 meters away. Furthermore, photoelectric sensors are quick, high-resolution sensors that make non-contact sensing easy and low-risk. 

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