Omron E2E-X3D1-R 5M is a shielded proximity switch from the E2E NEXT series, configured as a DC 2-wire normally open sensor with a 3 mm sensing distance. The 5 m bend-resistant cable suits applications where the cable sees repeated flex — cable carriers, hinged panels, or tight gland-plate routing. Shielded construction reduces false triggers when mounted flush in metal panels, so you can bore a blind hole and set the sensing face at the mounting surface without worrying about side-wall interference.
Why you might not want the E2C peer
The E2C-X1R5AH is a heat-resistance model with 1.5 mm sensing and a 3 m cable — half the sensing distance, shorter cable, and a different environmental rating. It's not a form-fit-function swap for the E2E-X3D1-R 5M; don't cross-reference it unless you're willing to re-drill the bracket and re-pull the cable.