The DM 170 is based on PCME’s class-leading ProScatter Backscatter technology.
Particles in the stack are illuminated by a laser and the amount of laser-light scattered back from the particles is measured by a detector. Stray scattering and ambient light are eliminated by tuning the instrument’s field-of-view and by use of a modulated laser source. The instrument response is proportional to dust concentration.
It can be calibrated to provide a mg/m3 measurement by comparison to results of a standard reference (isokinetic) test. With the ability to measure dust levels as low as 1 mg/m3, the DM 170 can be used in applications where emissions are well below the sensitivity limit of traditional Opacity instruments.