MH-30H-01-3G-3D. . For ATEX approved ultrasonic sensors for Zone 2 and Zone 22. Retainer for 30 mm cylindrical sensors with smooth housing. Installation in 3 ... 12 mm thick sheet metal. Simple installation and exact setting. M12 male connector. Status indication. Mounting on base module, pluggable. Up to SIL 3 acc. to IEC/EN 61508. Busy channel indication. Auto power off function