|  | | Features Checks for Carbon Dioxide (CO2) concentrationsMaintenance free dual wavelength NDIR (non-dispersive infrared) CO2 sensorTriple LCD simultaneously displays CO2, Temperature and Relative HumidityMeasurement ranges: CO2 - 0 to 4,000ppm; Temperature - 32 to 122°F (0 to 50°C); Humidity - 10 to 90%RHDatalogger stores readings on an SD card in Excel® format for easy transfer to a PCSelectable data sampling rate: 5, 10, 30, 60, 120, 300, 600 seconds or AutoComplete with six AAA batteries, 2G SD memory card, universal AC adaptor, and mounting bracke
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