How to make a simple Air Pollution Monitor?

air quality sensor

How to design a PM 2.5 air quality sensor for building automation? 

Air quality and its effects on health and vitality have recently become a much talked about topic. These sensors control air ventilation so as to optimise energy usage and avoid health issues caused by poor ventilation. The golden standard of measuring the level of air pollution is the Air Quality Index (AQI).

In this reference design from TI, a simple air quality monitor is created and implemented using the particulate matter 2.5 level. This design uses the TI MSP430FR4133 microcontroller in tandem with the Sharp DN7C3CA006 PM2.5 sensor. From periodic PM2.5 samples, the AQI is calculated and displayed using an 8-character, 14-segment LCD.


“The Sharp DN7C3CA006 sensor can measure to a μg/m3 level. Being able to calculate down to the µg/m3 level allows for an accurate calculation of a PM2.5 level rather than a less accurate PM10 level”, claims TI.

Air Quality Sensor Design Features

• Calculates PM2.5 Concentration Levels and Air
Quality Index Levels (AQI)
• Calculates Temperature and Humidity Levels
• Offers an 8-Character, 14-Segment LCD to Display
Calculation Results
• Uses an Ultralow-Power MSP430FR4133 Device
With an Integrated LCD Controller


• Air Purifiers
• Weather Stations
• Industrial Systems
• Air Conditioner Systems

Click here for the reference design.

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