This VL1C-NF18P-20NO-LM12 is an inductive proximity sensor with a M18 mm Nickel plated brass body with a Non Flush mounting design. It has a metal body length of 79 mm and is PNP-NO, with a sensing distance of 20 mm and M12 , 4 pin connector. It has a power supply of 10-30 VDC and protection rating of IP67. This highly durable sensor is perfect for Industrial Automation applications.