For measuring CO2 concentration, humidity and temperature in indoor areas and for evaluating the indoor air quality (IAQ).

Measuring range: 0 to 10,000 ppm, -10 to +50 °C, 5 to 95% RH

The set includes: testo 440 air velocity and IAQ measuring instrument, 3 x AA batteries, USB cable, ?CO2 probe* with Bluetooth, including temperature and humidity sensor (consisting of CO2 probe head and Bluetooth handle); 4 x AA batteries, table stand, basic case for testo 440 and 1 probe