The uRADMonitor CITY will be a device equipped with High Volume / High sensitivity electrochemical sensors to measure Ozone, Sulphur Dioxide, Nitrogen Dioxide and Carbon Monoxide in cities. Its enhanced sensitivity will provide readings that will allow for easy comparison with legal limits on Air Quality. The device will offer a low cost alternative to the existing national monitoring networks, while allowing for better resolution due to the low production costs, and subsequently more data.