Inductive Miniature Proximity Switch Sensor 10-30 Volt PNP NO 4 mm Endstop IP68 : Amazon.de: Business, Industry & Science
Miniature proximity sensor, Miniature proximity switch - All industrial manufacturers
Sensors for limited installation space | Baumer USA
1pcs Small cylindrical type proximity sensor ultra short small proximity switch Φ3 Φ4 M5 Φ6.5 M8 switch sensor NPN PNP sensor - AliExpress
M3 Thread Installation Miniature Retro-Reflective Proximity Switch 25cm Range for New Energy Industry - China DC Photoelectric Sensor, PNP/NPN Photoelectric Sensor | Made-in-China.com
M3, M4, M5, M6, Miniature, Inductive Proximity Switch, Small Metal Sensor, Two or Three Wire, NPN/PNP, DC 24V,NO/NC - AliExpress
Additional Contrinex small rectangular inductive proximity sensors from AutomationDirect