General Tools VOC08 Volatile Organic Compounds Data Logger The Volatile Organic Compounds Data Logger is ideal for making ballpark measurements of mixed-gas volatile organic compound levels as part of an indoor air quality maintenance program Metal-oxide semiconductor sensor within vented ball housing detects ammonia, toluene, ethanol, hydrogen sulfide (H2S) and cigarette smoke Makes ballpark measurements of total VOC concentration, and accurate measurements of ambient temperature, relative humidity (RH), and Dew Point and Wet Bulb temperatures Logs up to 32,000 data points. Meters entire capacity can be devoted to VOC readings, or devoted one-third each to VOC, ambient temperature and RH readings Powerful data logging software that downloads readings to PC for display/printing as table or graph. Software supports four data logging modes--including starting and stopping recording without a PC