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FAQ00381 of Photoelectric Sensors FAQ

FAQ No. FAQ00381

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What is the repeat accuracy for Photoelectric Sensors?


The accuracy depends on whether the Sensors are Through-beam or Reflective Sensors. The following table provides a general guide.

Accuracy (See note 1.)Measurement conditions
Through-beam Sensor
Retroreflective Sensor
0.1 mm max.
Diffuse-reflective Sensor0.1 mm max.
0.3 mm max.


1.The values for accuracy are for reference only.

2.For Photoelectric Sensors, the repeat accuracy is the range of measurement error if the voltage, temperature, sensing distance, sensing object, and angle of the sensing object are the same.