Description
The Zephyr sensor measures up to 9 physical air quality parameters:
particles from 1 to 10µm : PM1, PM2,5, PM4 et PM10
Volatile organic compounds VOC
Nitrogen oxides Nox
Air humidity
Ambient temperature
CO2 content (option)
It was developed as part of the fight against the A69 motorway project (Tarn/ Haute-Garonne, Occitanie region in France), to oppose the construction of two bitumen-fired power plants whose public health and environmental issues were not fully appreciated by government authorities. The operation was led by the Lauragais Sans Bitume LSB collective, supported by 11 other local sans bitume collectives. The sensors and the IT architecture to manage the data were designed by a group of enlightened amateurs from the area affected by the power plants, supported by the Granas de Carderas association, which distributes the sensors from its HelloAsso sales website. The sensors deployed (more than 60 to date) send their data every 5 minutes to a server that gives sensor owners access to a dashboard and allows everyone to view the air quality map in real time (link).
The system requires access to mains power and a WiFi connection near each sensor, as well as a computer configured as a server to centralize the data collected.
Each Zephyr has a unique identifier and stores the geographical coordinates of the location where it is installed. This makes it possible to generate a map of measured parameters in real time.
This document can be used to design a network of similar sensors in new territories.
About Sensirion sensors
The two electronic sensors used in the Zéphyr were designed by the Swiss company Sensirion. These are professional sensors designed, for example, to control ambient air purification devices or machines likely to emit toxic pollutants (boilers). They are highly reliable and precise, since their vocation is to protect human health.
SEN55 sensor
SCD30 sensor
Licence and attribution
Download the Zephyr description sheet
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