Inductive Proximity Sensor | 8 mm Diameter, Normally Closed – The Wintriss Store
Amazon.com: Oumefar 10mm Distance Measuring Capacitive Metal Normally Open Normally Closed Proximity Sensor Switch for Automotive Machine Paper Making Light Industry (LG18A3-10-J/EZ NO) : Industrial & Scientific
Heschen Square Inductive Proximity Sensor Switch Non-Shield Type SN05-