Sick IN4000 Inductive Safety Switch, 24 V dc, 3NO, Stainless Steel, M12 Plug, Switch Type: Cylindrical, Actuator Type: Magnetic, Switching Distance: 15 (Off) mm, 6 (On) mm, Terminal Type: 4-Pin M12 Connector, IP Rating: IP67, Dimensions: M18 x 90.5 mm, MPN: IN40-D0303K