CO2 Meter offers four different models of its EC100 rechargeable electrochemical data loggers. These include data loggers for oxygen, carbon monoxide, ethylene and ethylene oxide. The data loggers feature LiPoly rechargeable batteries, USB plug-and-play capability with free data acquisition system software and a logging memory up to 15, 000 data points. The EC100 is designed to remotely log data on the concentrations of a chosen gas for long periods of time. The sensors use a diffusion sampling method and log data at 15-second to 18-hour sample intervals.