9 Electronic apparatus and instruments for detecting radon, equivalent calculated carbon-dioxide, total volatile organic compounds, temperature, pressure and humidity, namely, radon and indoor air quality monitors; radon alarms; radon detectors; radon monitors; continuous radon monitors; environmental monitors, namely, sensors for measuring the concentration of sources of ionizing radiation; smart-enabled radon survey monitor; downloadable computer software for displaying, transmitting, recording, and analyzing air quality data; downloadable computer software platform for collecting, detecting, comparing, calculating, analyzing, displaying, and storing radon detection information; downloadable computer application software for recording data, transmitting data, and alerting sensor status for use in environmental monitors connected via network access devices, computers, mobile phones, tablet computers; downloadable computer software and downloadable software applications for mobile phones for collecting, detecting, comparing, calculating, analyzing, displaying, and storing radon detection information