A new paper published by the American Chemical Society (ACS Sensors) reviews the use of amperometric electrochemical gas sensors for monitoring inorganic gases that affect urban air quality. Written by John Saffell and Ronan Baron of Alphasense, the paper gives a full explanation of how the sensors work, how they have developed and a review of how they have been used. Key relevant studies are summarised as well as major studies using the sensors.
The paper mentions AQMesh as ‘the first provider of integrated air quality networks’ using the Alphasense sensors, and also refers to AQMesh correction algorithms (the authors consider data correction necessary) and the comparison field trials published regularly on the AQMesh website. University of Cambridge, Citi-Sense and IDAD projects, which used AQMesh, are mentioned: of the range of sensor systems submitted for the 2 week field comparisons trial in Aveiro, ‘The AQMesh unit achieved the highest correlation coefficient and the lowest mean absolute errors: R2 was 0.70 for O3, 0.89 for NO2, 0.86 for CO and 0.80 for NO. Other sensor boxes were unable to provide the same degree of correlation, possibly because of the lack of data correction for temperature variations.’
View the abstract here and register for access to the full paper.
Further reading – Assessment of air quality microsensors versus reference methods: The EuNetAir joint exercise.