Fig. 7: The open-seneca air quality monitor mounted on an electric motorbike, part of Ampersand’s delivery fleet. | npj Clean Air

Fig. 7: The open-seneca air quality monitor mounted on an electric motorbike, part of Ampersand’s delivery fleet.

From: Detecting urban PM2.5 hotspots with mobile sensing and Gaussian process regression

Fig. 7: The open-seneca air quality monitor mounted on an electric motorbike, part of Ampersand’s delivery fleet.The alternative text for this image may have been generated using AI.

The monitor was a portable device that measured PM2.5, temperature, humidity, and GPS location at 1 Hz. It featured an onboard display and a Garmin-style mount for wearable or vehicle use. Raw data were stored locally on an SD card for manual upload. For the period of data collection in Kigali, the sensors were permanently installed and powered by the electric motorcycle’s onboard battery.

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