Autopilot Desktop CO2 MonitorAccuracy, innovative features, and unbeatable affordability in one small, user friendly CO2 monitor. To deliver its measurements, the Autopilot APCEM2 Desktop CO2 Monitor features a clear display system that boasts a digital memory chart of recorded CO2, relative humidity, and temperature readings over an adjustable 24 hour or 7 day period. With the industry new feature Trend Chart, the device is able to trace the above quantities through past