This VL1A-NF12-04NO-ACM12 is an inductive proximity sensor with a M12 mm Nickel plated brass body with a Non Flush mounting design. It has a metal body length of 68 mm and is M12 , AC, NO, with a sensing distance of 4 mm and an M12, 4 pins connector. It has a power supply of 20~250V and protection rating of IP67. This highly durable sensor is perfect for Industrial Automation applications.