4650-PM continuous dust monitors help meet EPA’s new mercury and air toxics standards (MATS) for particulate matter measurement, supporting continuous emission monitoring and continuous parametric monitoring in dry stacks where condensed water is not present. 4650-PM has a minimum range of 0-15 mg/m3, fully meeting MATS requirements. Its design is based on QAL1-certified, highly accurate forward-scattering laser technology.