Particle Monitor from Chemtrac offers a far more sensitive alternative to a Turbidity Meter. Turbidity meters are based on the amount of light scattered at 90 degrees to the light source. Particle Monitors are based on the perturbation of a transmitted light signal and offer far greater sensitivity, particularly for larger particles such as those in the size range of Cryptosporidia and Giardia.

Reverse Osmosis and Nanofiltration performance is directly affected by the feedwater quality. The Particle Monitor is a sensitive low-maintenance device that alerts operators to the presence of particulate contaminants allowing corrective action to be taken at the pre-treatment system before the membranes are fouled or damaged. The PM2500XRD Particle Monitor is an on-line instrument that continuously measures the fouling potential of liquids fed to high purity filtration systems.

Particle Monitor Measurement Principle

The Particle Monitor, Model PM2500XRD, uses a unique measurement of “Dynamic Light Fluctuation" which can detect low parts per billion of particulate down to the colloidal size range of 1 micron. The system provides "predictive" fouling information that has historically been measured by silt density index (SDI) or by a Turbidity Meter.

The online, flow through sensor of the Particle Monitor eliminates sampling/testing variances encountered in manual SDI analyses. Sensors for the Particle Monitor can be multiplexed to provide complete, real-time monitoring of individual filters or any other component of the pre-treatment system.