🌬️ Dust Sensor Air Quality Sensors by Grove: Monitoring and Improving Air Quality Effortlessly Review

Works well and is easy to use. This is not a laser design and therefore does not count individual particles, but rather a cloud detection device that integrates low output signals caused by particles or groups of particles passing through an infrared beam over a period of typically 30 seconds. Well, down to a micron, which falls within the territory of dust and pollen. This is the Shinyei PPD42NS sensor for those interested in specs.

Works perfectly but does not give quantitative results, only three states: free air, low pollution, high pollution. It's not clear what this means in practice, so it can only be used to monitor changes in air quality and not actual conditions. The problem isn't with the Grove board per se, but with the sensor they used to detect it - it has very limited capabilities.

will not give you a PM2 reading. This gives you the exact zero to 1000 value you would find in airborne hazard reports. Overall, this is a pretty good sensor, but it does track speed as it takes time to heat up, making the device's accuracy questionable.