Aranet4 HOME Wireless Indoor Air Quality Monitor measuring CO2, Temperature, Relative Humidity and more
IoT devices that measure air quality are becoming increasingly common. I reviewed the Foobot back in 2017, then the Airthings Wave Plus in 2019. Recently I have been testing the Aranet4 HOME from the Latvian company SAF Tehnika. While the effects of high levels of CO2 were long thought to be benign, research has found that concentrations…