photosensor.

A device that detects light and converts the response into a signal.

Use it for

Words that belong together

• a photosensor array
• a photosensor circuit

On the page

The door opened when the photosensor detected movement across the beam.

Usage notes

Primary category: sci-fi. Forms: Singular photosensor; plural photosensors. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: description, setting. Commonness: moderately common.