Gas Analysers for Automatic Air Quality Monitoring Networks 2025 - LOT 1 ONLY

The UK Automatic Urban and Rural Network (AURN) is the Environment Agency's compliance network for the reporting of pollutant concentrations the Air Quality Directive (AQD) 2008/50/EC. This was transposed by respective Air Quality Standard Regulations across the UK and the Devolved Administrations. The network provides measurements of a range of pollutants including Particulate size fractions (PM10 and PM2.5) and the following gases: oxides of nitrogen (NOX), nitrogen dioxide (NO2), ozone (O3), sulphur dioxide (SO2) and carbon monoxide (CO). Further details of the current network are available on http://uk-air.defra.gov.uk/. The Environment Agency on behalf of the Department for Environment, Food and Rural Affairs (Defra), Affiliated Local Authorities and Devolved Administrations is seeking to procure gas analysers to measure the following gases: oxides of nitrogen (NOX), nitrogen dioxide (NO2), ozone (O3) and sulphur dioxide (SO2).