Cylindrical Inductive Proximity Switch LM8 with 2M 3 pin air plug cable Sn 1mm / 2mm AC DC 2 wire NPN PNP NO NC proximity sensor|Switches| - AliExpress
Parker P8S-GQCHX Magnetic Cylinder Position Sensor, NC PNP, M8 3-Pin, 10-30VDC | eBay
Panasonic/Sunx Metal Inductive Proximity Sensor - NonShielded M18 Threaded - Non Flush Mount 16mm Maximum Sensing Distance - IO-Link PNP-NC - Pigtail M12 4 Pin QD
3-wire Inductive Proximity Sensor | How to Read the Datasheet - RealPars