Keep track of carbon dioxide, temperature and humidity levels with this air quality monitor from Testo. It displays readings clearly on the LCD screen using a simple traffic light system to alert you if unsafe levels are reached. It has a carbon dioxide accuracy of ±50ppm (parts per million) and a temperature accuracy of ±0.5°C for reliable readings. The device comes with AA batteries that have a 12-month battery life for long-lasting use.

• Wide carbon dioxide measurement range of 0 to 5000ppm for use in areas with low to high levels of pollution
• Broad humidity measurement range of 0 to 100%RH (relative humidity) to take readings in wet or dry areas
• Wide operating temperature range of 0°C to +50°C for use in demanding environments

• Plant research
• Food storage
• Commercial ventilation
• Weather monitoring
• Garage safety

This air quality monitor provides a carbon dioxide resolution of 1ppm, a humidity measurement resolution of 0.1%RH and a temperature measurement resolution of 0.1°C. This means you'll get precise readings that will help you notice even slight changes in conditions.