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“This instructable is about making an inexpensive and a highly accurate air quality sensor named AEROBOT. This project shows temperature,relative humidity, PM 2.5 dust density and alerts about the air quality of the surroundings. It uses a DHT11 sensor for temperature and relative humidity, a sharp optical dust sensor for dust density and an ultrasonic sensor to inform users about inaccurate readings due to blocking of the sensor. This project can be made easily and doesn’t need any expertise in arduino. The dust sensor is very quick and can read even the slightest contamination in the surroundings. its maximum range is unknown but it usually is ineffective after the dust density goes over 600. But this is far more than the average contamination of 150. The measuring range of temperature is from -10 to 80 degree celsius and that of relative humidity is from 10% to 90%. Therefore this project is highly effective and efficient as a air quality sensor for homes and offices not in the radius of high pollution.”

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