A Personal Air Quality Monitor is a handheld or wearable battery-powered unit that tracks, measures, records, and transmits surrounding atmospheric condition data to one's electronic device (e.g., smartphone, computer). It warns workers with respiratory impairments if they are entering a dangerous environment for their lungs. The user can then, in real time, read the results (even be audio-alerted) and take protective action, if warranted. Among the pollutants that the monitor detects are carbon and nitrogen oxides, vehicle-exhaust emissions, dust, pollen, soot, mold, and a wide range of volatile organic compounds (primarily in gaseous form). It also measures atmospheric pressure, temperature, and humidity.