SI12-CE4 NPN NO H, Inductive Proximity Sensor, 12 mm diameter, 10-30 VDC, 3-wire, NPN
AECO Inductive Proximity Sensor, 12 mm diameter, nickel-plated brass, 10-30 VDC, 3-wire, NPN, unshielded, 4 mm sensing distance, N.O. output, M12 quick-disconnect (purchase cable separately)