The ALLEN BRADLEY 42EF-P2MNB-F4 is a Rightsight photoelectric sensor with cylindrical 18mm housing featuring front through-hole mounting. This polarized retroreflective sensor emits visible red light with 3000mm detection range, non-adjustable sensitivity, and NPN output with DC complementary LO/DO configuration. It includes 4-pin micro QD connector on pigtail wiring. Note: Factory warranty doesn't apply, but includes Beyondtech's warranty.