Profile: Comtech Research, LLC specializes in offering negative ion generators and air purifiers. Our negative ion generator cleans & purifies the air noiselessly by removing dust, pollen, mold spores, and other allergy causing particulates. Our ion detector can measure the relative air ion intensity indoors and even detect naturally occurring positive or negative ions outdoors. It uses special sensitive high-brightness light-emitting diodes and reliable solid-state circuits for a visual indication of the presence of air ions.