Detector

The carbon monoxide detector in the house went off, indicating a leak in the heating system.

He used a metal detector to search for buried treasure in the park.

The security guard used a motion detector to monitor the building after hours.

The doctor used a cancer detector to identify the presence of malignant cells.

The archaeologist relied on a ground-penetrating radar detector to locate ancient ruins.

The firefighter used a gas detector to identify dangerous levels of carbon monoxide.

The customs officer employed a drug detector to detect illegal substances in luggage.

The radiation detector detected high levels of radiation in the area.