SMC Networks ISA3 Series Operation Manual page 8

Features
The Gap between the detection surface and the workpiece (0.01 mm to 0.03 mm, 0.02 mm to 0.15 mm,
0.05 mm to 0.30 mm) can be detected.
The Gap condition is indicated on the main display in Green (ON) or Orange (OFF). : Default setting.
The sub display indicates the distance between the detection surface and the workpiece using a level meter.
This product is a non-contact switch which will not scratch the workpiece.
(A) The Workpiece is not seated in the correct position due to a foreign object.
(B) Within the acceptable range (Seats correctly).
(C) The Workpiece is more closely in contact than in (B).
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2 About this product
No.PS※※-OMW0009-A