Say, for instance, that you were cooking chicken soup with rice wine in it. The airborne particles of alcohol would multiply the apparent concentration of carbon monoxide. Unless the sensor was specially designed to avoid this sort of misreading, it would cause a false alarm.
譬如空氣中有酒精時（例如煮燒酒雞放了料理酒），對一氧化碳濃度就會產生加乘作用，而出現雜訊或假訊號，如果不能排除這類干擾，就會造成一場虛驚。