Throughbeam sensors (also known as through-beam photoelectric sensors) are a type of optical sensor used to detect the presence or absence of objects. They consist of two separate components: a transmitter and a receiver.
The transmitter emits a continuous beam of infrared or visible light.
The receiver is aligned with the transmitter and detects the light beam.
When an object passes between the two, it interrupts the beam, and the receiver registers this as an absence or presence signal.
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