Extech CO250 - Portable air quality and CO2 meter

Measure the carbon dioxide (CO2) content, temperature, humidity, dew point, and wet bulb temperature and calculate weighted statistical averages every 8 hours and every 15 minutes. - Verify carbon dioxide (CO2) concentrations, measure temperature and relative humidity, and display calculated dew point and wet bulb temperature. - Calculate Time-Weighted Average (TWA) and Short-Term Exposure Limit (STEL) statistical weighted averages (8-hour weighted average and 15-minute exposure limit). - Non-dispersive infrared CO2 sensor with no maintenance required. - Triple backlit LCD display and user-programmable audible alarm. - RS-232 interface, software, and cable provided for data analysis on PC. - Optional 33% and 75% relative humidity calibration bottles (RH300-CAL).

Comes with:
- Software
- Cable
- 4 AAA batteries
- Carrying case