detects
v.v. to notice or find something that is hidden or not easy to see. You often use this when a person or a machine finds a small change or a secret signal.
v. to discover or identify the presence or existence of something, especially something subtle or hidden. Often refers to the sensory perception of a stimulus or the technical operation of a sensor.
The smoke alarm detects even a tiny amount of smoke.
The new security system detects any movement in the hallway after the office closes for the night.
Sophisticated software now detects subtle patterns in financial data that might indicate fraudulent activity long before a human auditor would notice any discrepancy.
The verb is transitive and requires a direct object. It is the third-person singular present form of 'detect'.
The machine detects of the gasThe machine detects the gasDetect is a transitive verb and does not take the preposition 'of' before its object.