Compact measuring device for simple, fast, and precise measurement of air temperature and relative humidity. Ideal for measuring indoor air quality or ensuring optimal conditions in storage rooms. 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.

• Calculation of dewpoint and wet bulb temperature
• 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