The Particle Monitor from Chemtrac offers a far more sensitive alternative to a Turbidity Meter, and is capable of ppt detection of particles in potable water and condensate. 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.
Particle Monitor Benefits
- Sensitive particle monitor
- Reduce RO/NF membrane particulate fouling
- Reduce membrane replacement costs
- Monitor corrosion events in the steam cycle in real time
- Trigger auto sampling based on corrosion events
- Continuous process monitoring
The Particle Monitor is commonly used in water treatment, and more recently in power plant and boiler systems to determine the particle concentration in steam condensate. This is the need to correlate the particle concentration with corrosion events. The Particle Monitor can trigger a particle sampling event based on particle concentration, and is suitable for ppt solids measurement in water and power plants. As a particle analyzer it measures a relative particle density so has no particle count or size data like the particle counter, but is extremely useful as a particle sensor for monitoring small changes in the particle concentration in very clean water. It is ideally suited for online corrosion event monitoring as it picks up changes in unwanted metal oxides following corrosion events in the steam cycle.
Particle Monitor Features
- Analog outputs
- Up to 3 additional sensors input to one monitor
- Backlit graphical LCD display
- Simple calibration verification procedure
Particle Monitor Description
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" with a particle sensor, 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.
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