The EC100 Rechargeable Electrochemical Data Loggers are designed to remotely log gas level concentrations at any frequency the user chooses. They can “wake up”, take atmospheric readings, store them in memory, and go back to sleep within seconds. Benefits include: LiPoly rechargeable batteries; huge logging memory of up to 15,000 data points; and USB plug and play with free DAS software. CO2 Meter, Inc.,www.co2meter.com, (877) 678-4259. Circle 335 products