Extech CO240 - Indoor Air Quality Meter - Handheld CO₂, Temperature, Humidity, Dew Point & Wet Bulb Monitor with Audible Alarm

The Extech CO240 Indoor Air Quality Meter is a versatile handheld device designed to monitor key indoor environmental parameters. Equipped with a maintenance-free NDIR CO₂ sensor, it provides accurate measurements of carbon dioxide levels, air temperature, relative humidity, dew point, and wet bulb temperature. The user-settable high CO₂ alarm ensures that users are alerted when air quality deteriorates beyond acceptable limits.

• Comprehensive Air Quality Monitoring - Measures CO₂ concentration, air temperature, relative humidity, dew point, and wet bulb temperature for complete indoor environmental assessment.
• Maintenance-Free NDIR Sensor - Utilizes a non-dispersive infrared (NDIR) sensor for accurate and reliable CO₂ measurements without the need for regular calibration.
• Audible CO2 Alarm - Features a user-settable high CO2 alarm with an audible beeper to alert users when concentration levels exceed safe thresholds.
• Data Logging Capabilities - Includes software and USB cable for real-time data logging to a PC, enabling detailed analysis and record-keeping.
• Portable and User-Friendly - Compact design with a large LCD display, tripod mount, and includes six AAA batteries, USB cable, PC software, and a soft carrying case for convenience.
• Dual display of Carbon Dioxide (CO2) concentrations and Relative Humidity, Temperature, Dew Point, or Wet Bulb
• Maintenance free NDIR (non-dispersive infrared) CO2 sensor
• Audible CO2 warning alarm when concentration level exceeds high user set point
• Min/Max CO2 value recall function
• Data Hold, Auto Power Off (with disable), Low battery indicator