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 pods measure key pollutants in ambient air, both outdoor and indoor, using the best small sensor technology combined with data processing derived from extensive global comparisons with reference data. -AQMesh has been independently tested, with readings compared to reference by leading air quality professionals. -AQMesh provides the key measurements needed to understand local air quality all from a single, easily-mounted unit. -AQMesh performance has developed through a series of global co-location comparison trials in which AQMesh pods are installed next to an air quality reference station, with the comparative data analysed to produce a correlation coefficient (R2 value) showing the close relationship between the instruments.