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JSA ENGINEERING & SERVICES
Dust Monitor

Single Pass Opacity / In situ Dust Monitor


Dust Monitorsparticulate and opacity monitors are installed on a variety of applications. Our dust monitors have a proven track record across the globe.
They are used in applications ranging from burst bag detection and small boiler monitoring to large combustion plant processes.


  • µm – This is the unit of measurement used to describe the size of an individual particle i.e. 1µm (or a micron/micrometre) = 1 millionth of a meter. For example, a human hair is typically around 60µm diameter.
  • PM (Particulate Matter) – a mix of solid and liquid droplets suspended in the air to form. PM10 refers to all particles of 10µm and below in a sample. Our engineering team mocked up a quick graph that may be easier to understand. It is common practice for legislation to monitor PM1, PM2.5, PM4.25 and PM10 in particular.
  • nm – This is short for nanometre, for particulate sizes which are smaller than 1µm. For example, when we say the Air XD’s range starts at 0.38µm, this is expressed as 380nm in nanometres.
  • Ug/m³ –A measurement of particulate matter present in a given amount of cubic air – the measurement most frequently used by legislation bodies and policies.
  • TSP (Total Suspended Particulates) a regulatory measurement of the total mass concentration of particulate matter in a concentration of air or liquid.