The sensor also offers switching distances up to 75mm, as well as
flexible mounting configurations. The sensors detect all metals at the
same rated distance and feature extended range capabilities—even when
embedded in metal. The Ni75U-Q80 sensor facilitates single-sided
mounting on a rear metal wall, or it may be fully embedded, delivering
a 40mm switching distance when surrounded by metal on all four sides. Turck Inc.www.turck.us800.544.7769