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Small sensor air quality monitoring devices can be mounted flexibly, offering localised air quality information and data analysis, but they vary in what they can measure, how accurately they measure it, and how readings are accessed by users. Critically they also vary in terms of the reliability of data delivery.

Refinement and development of the AQMesh small sensor air quality monitoring system over many years, and through numerous global co-location comparisons, brings a wealth of unique benefits.

The Breathe London project has this week released a 3D data visualisation story created by the Environmental Defense Fund Europe and Google.

Four AQMesh pods are to be deployed at individual remote monitoring locations near schools in Kitchener, forming a small network to measure levels of nitrogen dioxide (NO2), particulate matter (PM2.5 and PM10) and carbon dioxide (CO2).

In 2015 a team from the University of Bonn began monitoring air quality around the Geiranger fjord, Norway. In this pilot study pollutant gases were measured using AQMesh, as well as particulate matter. From 2016 the team installed AQMesh pods at different points around the Fjord.

Breathe London preliminary analysis results reveal substantial NO2 pollution reductions after the UK government implemented restrictions to reduce the spread of Covid-19, particularly after social distancing was strongly encouraged on 16 March.

Technology is critical to so many essential services during the current global COVID-19 crisis, but it is also allowing local air quality to continue to be monitored, in real-time, across the world. Small sensor air quality monitors such as AQMesh pods can use cloud data storage to ensure that air quality information is stored and accessible even when staff are not able to visit equipment.

Mining applications in Southern Africa which use AQMesh include copper, phosphate platinum and coal extraction and handling. Typically the mining client will set up a network of pods to monitor in key locations around the perimeter of the facility, potentially including nearby sensitive zones, such as schools.

The small sensor air quality monitoring world has moved on during the last three years and we have identified several new challenges and benefits relating to the continual development of air quality monitoring technology.

Three AQMesh pods have been monitoring air quality in Kenya as part of a study to measure the impact of using biogas as an alternative cooking fuel.

The results of the 2019 AIRLAB Microsensors Challenge* were revealed in Paris on 21^st January and AQMesh was awarded the highest score for accuracy of all products presented for monitoring of outdoor air quality.

The Breathe London project has been announced as the winner of a SMART 50 Award by Smart Cities Connect, within the Digital Transformation category.

A network of sensors has been set up in Newcastle in order to give policymakers a more accurate picture of the air being breathed by children. The project is a collaboration with Newcastle University and Newcastle City Council who have installed 22 air pollution sensors outside schools that are located close to major roads.

Last month Environmental Defense Fund Europe (EDFE) together with Mayor Sadiq Khan are releasing the second wave of data from Breathe London, an ambitious collaborative project to measure and map air pollution across the capital.

Whilst not the only AQMesh pods still in regular use since the product was commercially launched in 2013, two AQMesh pods are still in use in Spain and demonstrate the long life of this small sensor air quality monitoring system.

A study published in the Journal of the American Medical Association has found that long-term exposure to poor air quality can have the same damaging effect as smoking 20 cigarettes a day, with air pollution shown to be more dangerous than passive smoking.

Minnesota Pollution Control Agency (MPCA) has been monitoring Minnesota’s air quality for a number of years, and it is generally considered to be good. However, MPCA wanted to understand how air pollution varies across small distances in order to minimise vulnerable communities’ exposure to harmful pollutants.

Detailed information on London’s (UK) air pollution is now being published on breathelondon.org, the website for a new collaborative project to paint a clearer picture of the city’s air quality.

Schools near Glasgow have been monitoring air quality as part of a project aiming to reduce the levels of pollution emitted by vehicles as they drop off and collect children. The project is part of a ‘Beat the Street’ initiative that was granted £50,000 from a new £1million fund to increase walking, cycling and sustainable travel in Scotland.

Following a successful evaluation phase in 2018, AQMesh small sensor air quality monitoring ‘pods’ have been selected for use in a project to control the ventilation of a road tunnel in the city of Marseille.

Supporting the aims of Clean Air Day today, 20^th June 2019, the Guardian has published a short film demonstrating the changing levels of pollution that children are exposed to as they walk to school in London.

Suite à une phase d’évaluation et en raison de sa qualité de mesure, la solution AQMesh a été sélectionnée dans le cadre d’un projet d’asservissement de la ventilation d’un tunnel routier dans la ville de Marseille.

A new network of air pollution monitors has been installed to record emissions from cruise ships docking in Greenwich.

The AQMesh small sensor air quality monitoring system already offers flexibility of monitoring location – through independent power and communications – as well as high data quality and traceability.

Few people know how clean the air is where they live, work, exercise or where their children go to school. Although air quality can be shown to vary significantly over short distances, air pollution is generally measured using a small number of large, expensive and high quality monitoring stations.

North Americans will be well aware of the particularly harsh weather in the early months of 2019, but AQMesh has taken conditions in its stride. The AQMesh stated operating range of -20°C to + 40°C is backed up by long-term operation across a wide range of climates.

In an inter-connected world, air quality is increasingly becoming another measurement made available to the public, but how reliable is the data?

AQMesh has been used in a project at the Port of Kiel, Germany, to measure emissions of nitrous oxides (NOx) and fine particulate matter (PM) around its cruise ship terminal.

Recent co-location comparison trials against certified reference equipment continue to prove AQMesh performance and reliability for localised air quality monitoring.

The UK’s first Urban Observatory, led by Newcastle University, has been designed to provide a digital view of how cities work. AQMesh air quality monitoring equipment is being deployed across Newcastle and Gateshead.

AQMesh has been measuring ozone (O3) using small sensors since 2011 and the readings from the latest generation electrochemical sensor, using AQMesh v4.2.3 processing, as compared to co-located certified reference readings, consistently show an R2 of over 0.9 with an accuracy ±10ppb (20µg/m3).

On Sunday 13th May 2018, Cardiff Council organised a car-free day in the city’s central area. As a result of this event air quality monitoring data showed an average 69% drop in nitrogen dioxide (NO2) – one of the pollutants of greatest public health concern.

AQMesh is now able to offer CO2 and H2S within its range of gas options for local air pollution monitoring. The NDIR CO2 sensor, which can be offered within a single AQMesh pod alongside five other gases out of NO, NO2, O3, CO, SO2 or H2S, as well as PM1, PM2.5, PM10, temperature, pressure and humidity, has been developed to deliver a higher performance than those typically used for indoor air quality monitoring.

London Mayor Sadiq Khan has launched a new, street-by-street monitoring system that will help to improve that capital’s air quality. From July 2018, and operating for a year, London will benefit from what is being described as the world’s most sophisticated air quality monitoring system.

Extensive research has shown that indoor air quality is often worse than outdoors. Closed system buildings trap harmful particles inside, and external air intakes can bring in more polluted air from outside.

Minnesota Pollution Control Agency (MPCA) has purchased fifty AQMesh pods to measure key air pollution gases and particulate matter across fifty different zip code areas.

The team at AQMesh continue to receive many enquiries from smart city initiatives and are concerned that integrators risk undermining entire projects by distributing meaningless or misleading air quality information.

Oxford City Council has been managing two AQMesh pods, supplied by Air Monitors Ltd, in order to monitor the impact the new Westgate centre is having on local air quality.

A new paper published by the American Chemical Society (ACS Sensors) reviews the use of amperometric electrochemical gas sensors for monitoring inorganic gases that affect urban air quality. Written by John Saffell and Ronan Baron of Alphasense, the paper gives a full explanation of how the sensors work, how they have developed and a review of how they have been used.

In October, the AQMesh distributor in Germany was personally invited to Austria to take part in an annual conference for the ambient air community.

Two AQMesh pods were used to measure NO, NO2, O3 and CO during May and June 2017 at Upplands Motor Stockholm AB car dealership in Sweden, located on the highway between Stockholm city centre and Arlanda airport.

AQMesh was selected to be included in the 2017 Parliamentary Review as an industry leader within the environmental technology sector.

Cleves School in Weybridge, Surrey (UK) has used AQMesh to measure pollution at the primary school’s entrance.

At the IAPSC in May 2017, Professor Rod Jones of the University of Cambridge presented his case study on large scale deployment of sensors, which included showing how AQMesh can be used to discriminate between local sources of pollution and regional sources of pollution.

Recent co-location comparison trials using the latest AQMesh processing (v4.2.3) have further proven AQMesh performance with impressive R2 values in excess of O.8 and 0.9 for NO2 in Benelux, Slovakia and Spain.

Leading small sensor air quality monitor, AQMesh, has recently been shown to work alongside passive samplers and air quality models, as well as complementing reference station networks.

The AQMesh team has carried out a test which shows that calibration (scaling) of AQMesh against one, or ideally several, diffusion tubes, is a viable option when no local reference station is available.

On 9th April The Sunday Times reported that employers have been told they are legally obliged to protect their staff from diesel fumes — and could be sued if workers develop cancer later in life.

IT teams are attracted by how readily data can be integrated and communicated whilst air quality professionals focus on how meaningful the air quality readings are.

Smart city projects increasingly seek to include air quality measurements. If city authorities and the public are being asked to act based on air quality readings they must be credible.

At the RSC AAMG event on ‘Air Quality Monitoring: Evolving Issues and New Technologies’ Professor Rod Jones of the University of Cambridge presented a paper showing very encouraging results.

An AQMesh pod used in the recent Citi-Sense project in Norway was returned to us at the end of the project, and we were surprised at the condition.

A new generation of air quality monitors is now being offered to provide localised, real-time air quality readings – but the potential benefit is only just starting to be realised.

The emergence of sensors capable of measuring the gases and particles that make up air pollution, especially in cities and industrial areas, has driven many academic studies which evaluate the sensors and compare performance against reference methodology.

AQMesh has an impressive collection of global users and performance results measuring ambient air quality in applications ranging from traffic planning and urban hotspots to industrial fence line monitoring.

Situated in the south west of Wales (UK), in a largely rural area bordering the Brecon Beacons, Carmarthenshire’s air quality is predominantly good.