Assertion: motion detector | /r/CapableOf | detect motion
Facets:
value: at distances of about 15 feet
type: OTHER
Source sentences:
text: Most low-cost motion detectors can detect motion at distances of about 15 feet (4.6 m).
text: An infrared motion detector senses motion based on changes in the background heat signature.
text: A motion detector might detect motion through the use of optics or acoustics and can be passive or active.