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Misunderstanding of photoelectric switch sensing distance

Release time:2019-04-16  Browse:774
Each reflective photoelectric switch will have a sensing distance. This sensing distance is usually based on pure white as the reference color of the sensing object, white because of its The absorbance is poor and the reflectivity is good, so the sensing distance is much longer than other colors. If the sensing distance of a photoelectric switch is 30CM, then the photoelectric switch may sense a distance of only 15cm when inducing a dark color object, especially a black object. Because the black light absorption is very good, the reflectivity will be quite poor. When the infrared rays are irradiated onto the surface of the black object, the light source is absorbed, so the sensing distance of the black object is the shortest, and even the insensibility cannot occur.
The sensing distance of the photoelectric switch also has a certain relationship with the external light intensity.

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