EMMS Mobile Air Quality Monitoring


Westfield Technology Group have developed a mobile air quality monitoring system, which can be permanently mounted to a vehicle, EMMS.

Due to how we currently live our lives and run our businesses, air quality is growing concern globally due to the potential impacts it has on human health, welfare and our natural environments. Many countries now routinely measure, monitor and report on ambient concentrations of a wide range of air pollutants, such as ozone, nitrogen oxides, sulphur dioxide, carbon dioxide, carbon monoxide, particulates, hydrocarbons and metallic pollutants.

Clean air is vital for people’s health and the environment, essential for making sure our cities are welcoming places for people to live and work now and in the future, and to our prosperity. It is therefore important to monitor levels of air pollution, to aid the management of emissions.

The broad objectives of monitoring air pollution for many bodies is to:

  • To fulfil statutory air quality reporting requirements,
  • Provide a sound scientific basis for the development of cost-effective control policies,
  • Provide the public with open, reliable and up-to-date information on air pollution, enabling them to take appropriate action to minimise health impacts, and
  • To evaluate potential impacts on population, ecosystems and our natural environment.


Traditionally, air quality has been monitored using networks of fixed instruments, monitoring continuously in the same location. To build a spatial picture of how air quality varies in different areas, multiple sites are required to develop meaningful data. This approach works, but it is important to understand the limitations and extent of the representativeness of the data. In many areas, such as cities with heavy traffic volumes, varied weather and sporadic emissions, patterns of air quality will vary spatial and temporally, and a fixed network will miss this complexity.

Mobile air quality monitoring enables you to cover more locations, quickly and more cheaply than deploying at fixed sites. Air quality changes, and mobile monitoring allows you to respond to these changes quickly. Mobile monitoring can also be a useful first step in assessing where to locate fixed sites to measure the highest concentrations of pollutants and maximise the value of the network. Mobile monitoring can often work out cheaper than fixed monitoring. A fixed site will require a range of infrastructure to operate, including power connection, mounting and security arrangements – and all of this is additional expenditure, will require maintenance and is difficult to move.