Air Quality Meter This AQM4 Indoor Air Quality Meter from UEi has the capability of taking four measurements all in one instrument; Carbon monoxide (Co), carbon dioxide (Co2), temperature, and relative humidity. Easily record, recall, or download your readings to your computer for record keeping or later data analysis. Four in One; CO, CO2, Temp & RH Min/Max TWA/STEL for CO2 User settable CO Alarm Record and download to PC for analysis CE Listed Send me information about Air Quality Meter Get more information about this product and one of our sales representatives will be in touch with you shortly! Close Just one more step… Product Reviews Helpful Resources