EXTECH CO200 Air Quality Carbon Dioxide Meter

Features: Checks for Carbon Dioxide ( CO2) concentrations with Max/ Min value recall function Maintenance free NDIR ( non-dispersive infrared) CO2 sensor Indoor Air Quality displayed in ppm with Good ( 380 to 420ppm) , Normal ( 1000ppm) indication Visible and Audible CO2 warning alarm with relay output for ventilation control Measurement ranges: CO2: 0 to 9, 999ppm; Temperature: -4 to 140° F ( -10 to 60° C) ; Humidity: 0.1 to 99.9% RH Displays Year, Month, Date, and Time Automatic Baseline Calibration ( minimum CO2 level over 7.5 days) or manual calibration in fresh air The Extech CO200 air quality monitor can measure carbon dioxide ( CO2) , air temperature and humidity with user-settable high and low alarms. The Extech CO200 air quality monitor checks for carbon dioxide concentrations using a maintenance free NDIR ( non-dispersive infrared) sensor. Indoor air quality is displayed by the Extech CO200 air quality monitor as " Good" ( 380 to 420ppm) , " Normal" ( less than 1000ppm) or " Poor" ( greater than 1000ppm) . Other features of the Extech CO200 air quality monitor include visible and audible CO2 warning alarms with relay output for ventilation control, year-month-date and time displays, Max/ Min CO2 value recall function and automatic baseline calibration or manual calibration in fresh air. Includes: Extech CO200 Desktop Indoor Air Quality CO2 Monitor