The BLT 31M from Balluff Inc.
, Florence, KY, detects UV luminescent materials and markers with a range of up to 300 mm. Features include adjustable light projection, high resolution, auto-teach and manual programming, an analog 0–5 V output, 1 discrete output, and a numerical display of the relative intensity of the returned signal. When the reflected light level exceeds the preset threshold, the sensor's discrete output changes state, warning of a possible process variation. Applications include packaging, small part detection, and error proofing.