The ALLEN BRADLEY 42EF-D2MPAK-F4 is a cylindrical photoelectric sensor with 18mm diameter, featuring front through-hole mounting and standard diffuse sensing method. It emits visible red light with 500mm sensing range and offers manual adjustability. The sensor utilizes PNP output with DC complementary LO/DO configuration, equipped with 4-pin micro QD connector on pigtail for easy installation. Note: Factory warranty does not apply, but includes Beyondtech's warranty.