Can a sensor detect objects smaller than the standard calibrating plate?
The sensing distances Sn are measured with a standard calibrating plate. The standard calibrating plate is made of steel (e.g. FE 360 according to ISO 630) with a smooth surface, square shape and a thickness of 1 mm. The length of its side corresponds to the diameter of the marked circle of the sensing surface or to three times the rated sensing distance Sn of the proximity sensor, whichever value is the larger. If objects are to be detected which are smaller than this target, the detection distance must be smaller accordingly. In extreme cases, detection will not be possible. For the detection of small objects, the user must test the sensor in each case to determine the actual detection distances under the relevant conditions in each case.
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