Yankho: Ma alamu athu a utsi amagwiritsa ntchito ma diode apamwamba awiri otulutsa infrared (IR LED), omwe amadziwika kuti amazindikira mwachangu moto womwe ukufuka komanso amachepetsa ma alamu abodza. Ma alamu athu a CO amagwiritsa ntchito masensa enieni amagetsi kuti azitha kuzindikira carbon monoxide modalirika.














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