Amazon.com: HEXEH Proximity Switch Sensor Inductive Proximity Switch Metal Shell Induction M8 Two Wire Normally Open/Close 36V Sensor ALJ8A3-1-Z/D1 (Color : DC 3wires PNP NO) : Industrial & Scientific
Amazon.com: ASCO NUMATICS NPN-QDS-M8-U Discontinued by Manufacturer, M8 Connector SNAP FIT, Magnetic Position Sensor, Hall Effect-NPN Sinking, PUR Cable .3M, T-Slot Switch; NPN Quick Disconnect : Industrial & Scientific
Cylinder Switch Sensor, DC AC 5V 240V Magnetic Air Cylinder, Reed Switch None Internal Consumption Current for Pneumatic Cylinder SU SC SI MAL MA: Amazon.com: Tools & Home Improvement