Autonics
PR08-2DN2
Inductive Proximity Sensor, Ø8mm, Non-Shielded, 2mm Sensing Range, NPN NC, 3-Wire, 10-30VDC, 2m Cable
Alt: PR Series
Inductive Proximity Sensor, Ø12mm, 2mm Range, NPN NC, 3-Wire, 12-24VDC
If you are looking for a cost-effective inductive proximity switch, look no further!
The PR series is IP67 and available in 8mm, 12mm, 18mm and 30mm. They are also available in DC 2-wire, DC 3-wire and AC 2-wire.
Most of these sensors can ship in 1 to 2 days!