gas detection drone

gas gun; (tear) gas launcher

drone war (world’s first drone war)

drone field of view (drone FOV)

drone swarm attack / drone swarming attack

drone swarm's counter-drone capabilities

hobby drone (hobby grade drone)

one-way attack drone (OWA drone)

ambush detection device

automated target detection, tracking, co-ordinate finding and interceptor guidance system

avoiding detection

bomb-detection device

chemical detection equipment

detection equipment

detection system

detection zone

early detection

electronic detection countermeasures

electronic detection device

explosive detection

gamma-induced detection

IED detection

IED remote detection

invisible detection

low probability of detection (LPD)

magnetic anomaly detection (MAD) gear

Mobile Detection Team (MDT) (counter-narcotics)

nuclear detection sensor

radar (radio detection and ranging)

RADIAC ('radioactivity, detection, indication and computation')

radiation detection team

radio detection and ranging (radar)

radio frequency target detection