The S18SP6DQ is an epoxy-encapsulated barrel-mount photoelectric sensor from Banner Engineering's EZ-Beam S18 series, featuring diffuse sensing with a maximum range of 100 mm. It operates at 10-30 VDC with complementary PNP output, includes a 9-meter cable, and has an M12 4-pin connector with integral quick disconnect (QD). Model number: 29508.