This VL1D-NFQ40N-20NO/NC-SM12 is an inductive proximity sensor with a Q40 mm PBT body with a Non Flush mounting design. It has a metal body length of 65 * 40 * 40 mm and is NPN-NO+NC, with a sensing distance of 20 mm and an M12, 4 pins 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.