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Air quality monitoring sensor certification scheme MCERTS

What is MCERTS and how does it apply to air quality & emissions monitoring?

EarthSense’s air quality & emissions sensor the Zephyr® meets requirements set out by Environment Agency and has been awarded MCERTS status for indicative ambient particulate monitors (IAPM). This means that the Zephyr® is compliant with performance standards as an indicative ambient particulate monitor for PM10 and PM2.5.

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What is MCERTS?

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The Environment Agency set up its monitoring certification scheme (MCERTS) to provide guidelines on the standards you need to meet to monitor emissions that affect the environment. The MCERTS certification process is conducted by the CSA Group UK Ltd. The CSA Group UK Ltd is a certification body appointed to run this scheme on behalf of the Environment Agency.

To become Indicative Ambient Particulate Monitor MCERTS, also known as iMCERTS, compliant the organisation must test their monitor against the indicative ambient particulate monitors (IAPM) requirements. This includes laboratory tests, reports, and approval of the application from the Certification Committee.

Discover our own indicative MCERTS-compliant, award-winning air quality monitor:

The Benefits for Air Quality Monitoring

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Complies with permit requirements for dust monitoring & construction activities

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Provides a framework for choosing monitoring equipment and services that meet the Environment Agency’s specifications

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Promotes public confidence in monitoring data and confidence in using it in air quality management software


Internationally recognised standards regarding ambient air monitoring

How is MCERTS Awarded for Indicative Ambient Particulate Monitors?

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Organisations that provide Indicative Ambient Particulate Monitors, must comply with the certification requirements to become MCERTS compliant.


For Indicative MCERTS, the monitor will be sent to an approved laboratory to assess that it meets the requirements with performance testing. It must provide 80 days of consistent data with less than 50% uncertainty. The device is measured against multiple of the same device and a reference method. 

A report will then be produced with supplementary data. The CSA will then evaluate this report. A manufacturing audit is also conducted to ensure the manufacturing process complies with the requirements for the certification. 

Once these steps have been completed the Environmental Agency and a Steering Committee will review the application. If the application is approved the organisation will then be awarded MCERTS for Indicative Ambient Particulate Monitors and the certificate will be published on the CSA's website. 


MCERTS requirements for Indicative Ambient Particulate Monitors cover the following particulates:

•            PM10

•            PM2.5

Read our press release about the Zephyr® meeting MCERTS performance standards.

“Governing bodies have a duty to ensure that companies that are likely to carry out potentially harmful activity, such as construction and demolition, are complying with guidelines to ensure that they’re not negatively affecting the environment and public health.

This is why it’s essential for them to utilise tools that provide data quality that has been certified by a third party, such as the CSA’s MCERTS.”


Tom Hall

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Managing Director, EarthSense

How do I know if a Product is MCERTS Compliant?

MCERTS listed product

The product is listed on the certified products list on the CSA Group website.


The product has a certified MCERTS logo with the current certificate number.

MCERTS certificate

The organisation can provide a copy of its valid certificate of MCERTS accreditation.  

Find out more

Watch our video on Indicative MCERTS and its Importance in Air Quality Monitoring

Watch our webinar, joined by our partner KP Acoustics, where we discuss indicative MCERTS, how we received the certification for the Zephyr® monitor, hear from KP about using the Zephyr® in real world construction and more!

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Greg Lewis
CSMO, EarthSense

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David Green
Product Manager, EarthSense

Read our press release about our Zephyr® being awarded iMCERTS

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Learn more about our iMCERTS compliant Zephyr® Air Quality Monitor

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Learn more about how our award-winning, certified, indicative ambient air quality monitor, the Zephyr® can help you accurately measures harmful gases and particle matter within your network or site.  

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