Product Guide Air Quality Monitoring These HOBO UX-90 data loggers capture a wide range of conditions. Photo: Onset Computer Corp. Behind the recommendations Related articles Behind the recommendations Related articles Air Quality Monitoring These monitoring systems test for harmful particles as well as gases like radon, VOCs, and carbon monoxide. More about Air Quality Monitoring Lack of Fresh Air, Chemicals from Building Materials May Make Schoolchildren Sick Pushing Weatherization, Feds Look the Other Way on Radon Radon and Schools: A Study in Denial Radon Not the Only Soil Gas to Poison Minnesota Homes HOBO Data Loggers: No Longer Just for Researchers Preliminary Study Supports LEED Productivity Benefits Recovering Heat from Commercial Kitchen Exhaust