Measures Carbon Dioxide (CO2), temperature, humidity, dew point, and wet bulb;Checks for Carbon Dioxide (CO2) concentrations;Calculates statistical weighted averages of TWA (8 hour time weighted average) and STEL (15 minute short term exposure limit);Maintenance free NDIR (non-dispersive infrared) CO2 sensor;CO2 measurement range: 0 to 5,000 ppm;

• Extech CO250 Portable Indoor Air Quality CO2 Meter/Datalogger

Extech CO250 Portable Indoor Air Quality CO2 Meter/DataloggerExtech