Providing a comfortable, safe and healthy indoor environment is an increasingly important concern. Good air quality increases concentration and productivity. It can also reduce lost days due to absence. TSI's Q-TRAK IAQ monitor provides quick, accurate information to assess key IAQ parameters. Benefits include: the measurement of CO, CO₂, relative humidity and temperature; calculates dew point, wet bulb and percent outside air; displays up to 5 measurements simultaneously; one instrument with multiple plug-in probe options; user-selectable logging intervals and start/stop times; stores up to 38.9 days of data collected at one-minute log intervals.