Air-Quality Meter for Checking CO & CO2 Levels - This Air Quality Monitor indicates carbon dioxide (CO2) and carbon monoxide (CO) levels on a dual bargraph and sounds an alarm when either level reaches a preset concentration. You should use it if you have an unflued heater in your home, boat, caravan or any indoor space.__ SiliconChip
IoT-Enabled AIR Pollution Meter with Digital Dashboard On Smartphone - Presented here is a project to monitor air quality on your smartphone using Blynk application and Arduino board. Blynk is an internet of Things (ioT) platform to control Arduino, Raspberry Pi...__ Electronics Projects for You
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