MMB70-18GH50-E2-V1. . Stainless steel sensing face. 3-wire DC. Easy fiber optic installation with quick-action clamping lock. Aluminum housing with high-quality Delta Seal coating. Short circuit and low voltage indicator. Clear and functional display concept for the operating modes. Protection class II. Up to SIL 3 acc. to IEC/EN 61508. Busy channel indication. Auto power off function