A through-beam sensor has the shortest sensing range of the three types of photo sensors.

Name: A through-beam sensor has the shortest sensing range of the three types of photo sensors.
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Quizplus · Accepted Answer

A through-beam sensor typically has the longest sensing range among the three types of photoelectric sensors (through-beam, retro-reflective, and diffuse) because it uses separate emitter and receiver units, allowing for a more focused and efficient light path.

A Through-Beam Sensor Has the Shortest Sensing Range of the Three