Schneider XUK1ARCNL2 XUK-Optoe. Sensor, Reflexions-Lichtschranke, Sn 7m, 24-240 V AC/DC, Kabel & Schneider Electric XUZC50 Reflektor XUZC50 1St. : Amazon.de: Baumarkt
Kemo B062 Infrared Light Barrier - Max 60 Feet - Consists of Transmitter and Receiver, Works with Invisible Infrared Light Beam - DIY Soldering Kit : Amazon.de: Toys & Games
DC 3-Draht Lichtschranke Schalter, 3 Draht E18-B03P1 IR-Lichtschranke Schalter 5-30 cm : Amazon.de: Baumarkt
Schartec Reflective Light Barrier Universal Compatible with e.g. Hörmann, Sommer, Came, Nice, Bft, Berner, etc. Light Barrier with Reflector 2-Wire and 4-Wire : Amazon.de: DIY & Tools