Answer :

Final answer:

A carbon monoxide detector indicates the presence of this deadly gas by measuring the levels of carbon monoxide in the air. It contains a sensor that reacts with carbon monoxide and generates an electrical signal to trigger an alarm.

Explanation:

A carbon monoxide detector indicates the presence of this deadly gas by measuring the levels of carbon monoxide in the air. It contains a sensor that is sensitive to carbon monoxide and can detect even low concentrations of the gas.

When carbon monoxide is present, the sensor in the detector reacts with the gas and produces an electrical signal. This signal triggers an alarm, alerting people to the presence of carbon monoxide.

For example, a common type of carbon monoxide detector uses an electrochemical sensor that measures the current produced when carbon monoxide reacts with an electrode. The more carbon monoxide present, the higher the current and the louder the alarm.

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