Best Aranet4 CO2 Meter Alternatives Under $100?

Looking for an accurate, low-cost CO2 meter? I show you the best- and worst options. Aranet4 Vitalight/Mini CO2 Monitor Qingping Air Monitor Lite Sensirion Gadget The Hot New Back-to-School Accessory? An Air Quality Monitor. Exhaled CO2 as COVID-19 infection risk proxy for different indoor environments and activities CO2 concentration monitoring inside educational buildings as a strategic tool to reduce the risk of Sars-CoV-2 airborne transmission Assessment of CO2 and aerosol (PM 2.5, PM 10, UFP) concentrations during the reopening of schools in the COVID-19 pa