"detector" - key terms from Wikipedia

canny edge detector
carbon monoxide detector
chemical detector
collider detector	at fermilab
conductivity detector
corner detector
cosmic ray detector
crb detector
crystal detector
detector
detector	array
detector	elements
detector	lock
detector	system
detector	used
discharge ionization detector
edge detector
feature detector
flame ionization detector
gravitational wave detector
input to the phase detector
ionization detector
laser detector
lie detector
magnetic anomaly detector
metal detector
motion detector
optical smoke detector
phase detector
photo detector
photon detector
radar detector
radiation detector
rich detector
scintillation detector
smart detector	array
smoke detector
tachyon detector
uv detector