SC30SM-C20 PNP NO+NC H, Capacitive sensor,AECO Capacitive Proximity Sensor, Metal 30 mm diameter, 10-30 VDC, 4-wire, PNP, shielded, 20 mm adjustable sensing distance, complementary (N.O. or N.C.) outputs, M12 quick-disconnect (purchase cable separately) **C30000019**