The world of air quality monitoring has been revolutionised by the rise of Low-Cost Sensor (LCS) systems. These devices offer the promise of wider spatial coverage and real-time data, but for professionals in the construction and demolition sectors, a critical question remains: are these sensors fit-for-purpose for regulatory compliance?

The Institute of Air Quality Management (IAQM), recognising the concerns among its members, has published a new Position Statement on the use of LCS for PM10​ (Particulate Matter up to 10 micrometres in size) monitoring near construction sites.

Exert from version 1.0 IAQM Paper:

The Issue: With the increasing availability and use of low-cost sensor (LCS) particulate matter (PM) monitoring systems (also known as indicative sensor systems), IAQM members have raised concerns about whether these systems are fit-for-purpose, and compatible with the aims of IAQM Guidance(i) and the Code of Practice(ii), when used to monitor PM10 concentrations around construction sites, particularly during elevated PM events. This position statement only relates to PM10. The recent MCERTS updates and this guidance do not currently apply to PM2.5 measurements. The indicative nature of LCS systems means they are not currently fit-for-purpose for reporting against air quality objectives, limit values or PM2.5 targets.

Read the paper here.