Inductive Proximity Sensor, Ø18mm, Flush, 10-36VDC, 8mm Range, PNP NO, Short, M12 Plug Connection Plug Material Nickel Plated Brass Normally Open/Closed Normally Open (NO) NPN or PNP PNP (Source) All - Specific Ratings IP67 Series ICB Series Shielded/Unshielded Shielded - Flush Size 18mm Type of Sensor Inductive All - Voltage 36VDC