non-dispersive infrared analyzer

far-infrared analyzer

cylindrical deflector analyzer

combustion analyzer

exhaust analyzer

fuel pump analyzer

NOx analyzer

HC analyzer

gas analyzer

fire unit analyzer

non-interference; non-intervention

non-mandated non-governmental organization

non-directional beacon (NDB) / non directional beacon

active infrared (IR) guidance system

electro-optic/infrared (EO/IR)

forward looking infrared (FLIR) camera

imaging infrared system (I2R sys)

infrared (IR)

infrared / negative ultraviolet (IR/NUV) seeking

infrared acquisition system

infrared beam

infrared CO2 laser

infrared devices

infrared homing system

infrared imaging sensor

infrared intelligence (IRINT)

infrared night vision observation device

infrared receiver

infrared sensor

infrared target-sensor

forward looking infrared (FLIR) receiver

infrared sight-line control (ISC)

IRR / Infrared Resistant