HELI-R Infrared Emitter Kingbright HELI-R Infrared Emitter features a reverse-mount SMD LED designed with gallium arsenide infrared-emitting diodes. This infrared emitter is mechanically and spectrally matched to the phototransistor. The HELI-R infrared emitter provides level 3 moisture sensitivity. This infrared emitter operates at a temperature range of -45°C to 85°C. The HELI-R infrared emitter is ideal for use for infrared illumination in cameras, machine vision systems, surveillance systems, industrial electronics, and remote controls.