EXTECH CO 100 Desktop Indoor Air Quality CO2 Monitor

The Extech CO100 Measures Carbon Dioxide ( C02) , Air Temperature and Humidity. Maintenance free NDIR ( nondispersive infrared) CO2 sensor. Indoor Air Quality displayed in ppm with Good, Normal, Poor indication. Visible and Audible CO2 warning alarm. CO100 is user programmable for visual and audible alarm. Features: Checks for Carbon Dioxide ( CO2) concentrations Maintenance free NDIR ( non-dispersive infrared) CO2 sensor Indoor Air Quality displayed in ppm with Good ( 0 to 800ppm) , Normal ( 800 to 1200ppm) , Poor ( > 1200ppm) indication User programmable Visible and Audible CO2 warning alarm Measurement ranges: CO2: 0 to 9, 999ppm Temperature: 14 to 140° F ( -10 to 60° C) Humidity: 0.1 to 99.9% RH Displays Year, Month, Date, and Time Max/ Min CO2 value recall function Automatic Baseline Calibration or manual calibration in fresh air