AQMesh is the proven small sensor outdoor air quality monitor manufactured in the UK by Environmental Instruments Ltd and supported worldwide through a global network of distributors. It has been designed to offer a robust and easy-to-use air quality monitoring system that can deliver localised real-time readings, improving the accuracy and scope of gathering air quality data in order to support initiatives to reduce air pollution and its risk to human health.

AQMesh was first commercially launched in 2012 and is the only small sensor air quality monitoring system that can demonstrate its performance across extensive global co-location comparison trials now spanning more than 9 years. AQMesh pods have been operating out in the field during this time next to certified reference equipment, in real applications, in real conditions, across all environments, throughout all seasons, for months rather than weeks or days.

Refinement and development of the AQMesh small sensor air quality monitoring system over many years, and through these numerous global co-location comparisons, brings a wealth of unique benefits. As well as a range of comparison datasets across climates from the Middle East to Scandinavia, each AQMesh pod has always been subject to a comprehensive factory set-up, following best practise of co-location comparison with reference equipment.

Since 2015, the electrochemical sensors used in AQMesh have gone through this ambient characterisation during manufacture as part of the stringent AQMesh quality assurance process, which also includes strict criteria for particulate matter (PM). This means every AQMesh pod out in the field to date has been through specific quality control measures to ensure the efficiency and reliability of each sensor in real-world conditions.

At the AQMesh factory, a custom-built mobile enclosure houses climate-controlled reference/equivalence analysers sampling air from an ambient ‘cage’ which can hold up to 100 AQMesh pods at a time. As well as sensor characterisation, this allows pod-to-pod precision to also be evaluated at the same time. The reference equipment includes Thermo Scientific 42i for NO, NO2 and NOx, Thermo Scientific 43i for SO2, Ecotech Serinus 10 for O3, Ecotech Serinus 30 for CO as well as the industry standard FIDAS 200 for PM1, PM2.5, PM4 and PM10. The enclosure is maintained at a constant, consistent temperature of 18 +/-2 degrees centigrade all year round, and all analysers are serviced regularly and calibrated themselves before each sensor characterisation batch.

Access to their own reference station, and the ongoing development of AQMesh since it first launched in 2012, has also enabled the team to continually review the product’s long-term performance. Baseline stability of AQMesh’s electrochemical sensors has been proven over many years of independent global co-location trials against certified reference equipment.

This combination of long-standing factory “calibration”, extensive global co-location comparison field testing now spanning over nine years in real, ambient conditions across a range of environments and climates, and a number of other unique benefits means AQMesh is arguably the most reliable and accurate small sensor air quality monitoring system available on the market today.

For more information including sales enquiries please visit the AQMesh website: