This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Ormk. lightshielded stray light chamber of smoke detector IR emitting LED black chamber IR receiving photodiode pink light way lichtabgeschirmte Streulichtkammer eines Rauchmelders InfrarotLED Kammer aus schwarzem Kunststoff Empfngerdiode own Ulfbastel Check categories August Disassembled smoke detectors