Extech products are high-quality handheld test, measurement and inspection tools. These are tools that help prevent, identify and solve problems, whether it's electrical, mechanical or maintenance. Rugged handheld testers, gauges and thermometers are put to the test every day by professionals, tradesmen and DIY enthusiasts. Extech is the pursuit of excellence in technology.

The easy-to-use Extech CO240 air quality meter measures carbon dioxide (CO2), temperature and humidity. The device also calculates dew point and wet bulb temperatures. The user can set an audible alarm for high values. The meter is ideal for performing a quick CO2 check to adjust environmental conditions in confined spaces such as greenhouses to ensure optimal conditions for crops. The device is also perfect for measuring environmental parameters in facilities such as factories, schools, hospitals, conference rooms, and anywhere where high concentrations of carbon dioxide can be generated for proper ventilation.

Specification
- Acoustic alarm of exceeding the CO2 content threshold (adjustable value)
- Maintenance free NDIR sensor
- Indication of dew point temperature and wet bulb temperature
- USB connector + tripod connector
- Max/Min value memory
- Battery replacement indicator
- Auto power off (can be disabled)
- Data-Hold
- Data logger

Technical data
- Temperature measuring range: -10 to +50 °C
- Humidity measuring range: 10 - 90 %rH
- Temperature measurement accuracy: ±1 °C
- Accuracy of humidity measurement: ±5%
- Dimensions: 40x60x211mm
- Measuring range: 0 - 9999 ppm
- Gas measurement specifications: temperature measurement function, USB interface, data logger function
- Measured quantities: CO2 / temperature / humidity
- Accuracy: 75ppm
- Maximum measuring range: 9999 ppm
- Minimum measuring range: 0 ppm
- Power supply (details): 6 AAA batteries
- Weight: 181g

Kit includes
- Six AAA batteries included
- USB cable
- PC software
- Cover and manual