A: Peb cov tshuab ceeb toom pa luam yeeb siv ob lub teeb infrared emitting diode (IR LED) uas paub zoo heev, uas paub txog kev ntes tau hluav taws kub sai thiab txo qhov ceeb toom cuav. Peb cov tshuab ceeb toom CO siv cov sensors electrochemical kom raug rau kev ntes cov pa roj carbon monoxide.














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