Which factors can affect the performance of a photoelectric sensor?

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Photoelectric sensors rely on light traveling to a target and either being interrupted or reflected back to the receiver. Their performance depends on how much light actually interacts with the target. A target that is too small may not block or reflect enough light to meet the detection threshold. The angle between the beam and the target matters because light returned to the receiver is highly sensitive to incidence; if the target is off-axis, the signal can drop below what the sensor needs to trigger. Target reflectivity is also crucial: bright, highly reflective surfaces return more light and are detected more reliably, while dark or matte surfaces absorb more light, producing a weaker signal and possibly a miss.

Because these conditions can either weaken or strengthen the detected signal, all of these factors can affect performance.