Compact meter for simple, fast, and precise measurement of CO₂ concentration to ensure indoor air quality. Measurement data can be transmitted to smartphones or tablets via Bluetooth^®. The connection to the free testo Smart App enables configuration of the device as well as display, storage, and documentation of measurements.

• High reproducibility of measurement results due to long-term stable infrared sensor technology
• Acoustic alarm when limit values are exceeded
• Time and point averaging
• Quick in-app configuration, graphic history, second screen, and measurement data memory in the testo Smart App
• Display illumination
• Hold function
• Display of min./max. value