Door contact magnetic sensor, safety wired magnetic switch with roller gate contact for garage alarm at home. : Amazon.de: DIY & Tools
Wired Metal Roller Shutter Door Magnetic Contact Waterproof Switch Alarm Door Sensor for Home Alarm System|Elektroschloss| - AliExpress
No Nc Metal Wired Roller Shutter Door Magnetic Contact Reed Switch With Installation Bracket For Security Alarm System - Window Door Sensor - AliExpress