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Homeland Security Technologies

Water Distribution Monitoring Panel

Standard WDMP sc

Reagentless WDMP sc

Overview:

The Water Distribution Monitoring Panel consists of normal water quality parameters that can be used on virtually any finished water application and are useful for monitoring water quality, water security, event detection, operational mistakes and will assist in identifying the following potential problems that may occur in a distribution system that pose risks to public health and infrastructure. On-line monitoring is the first big step towards distribution water quality.  The panel is now available in a reagentless version, using Hach’s CL10 chlorine analyzer.

The water panel will assist you in detecting:

  • Microbial growth and biofilm formation
  • Cross connections and back flow
  • Intrusions
  • Corrosion and aging infrastructure
  • Decay of water quality over residence time
  • Contamination during infrastructure repair
  • Caustic overfeeds

The sensor data can also be used to:

  • Optimize flushing schedules
  • Aid in hydraulic mapping
  • Find issues before your consumers do

The basics of the Water Panel:

  • The right tool to establish your distribution system´s water quality baseline
  • Field proven instruments you can count on
  • Multi-parameter on-line panel includes pH, conductivity, chlorine (free or total, with or without reagents) and turbidity, temperature and sample pressure
  • Hook up the WDMPsc to Event Monitor for simplified Event Detection
  • Remotely view and manage your sites with Hach CityGuard – an easy way to see the status of multiple sites at a glance and be able to drill down into the instrumentation as if you were standing in front of it from the comfort of any PC with access to the Internet
  • Panel can be optimized with the Event Monitor Trigger System, on-line TOC analyzer, auto-sampler, and ORP, ensuring complete Event Detection
  • Single sample inlet, outlet, and power hook-ups for ready to install convenience

Chlorine – CL17 Chlorine Analyzer

Every 2 ½ minutes the instrument obtains a sample, applies a DPD colorimetric method based on an approved USEPA method and gives either a free or total chlorine reading, depending on the reagent in use at the time. You want adequate chlorine residuals to provide a first defense against microorganism contamination, yet excess chlorine can form DBPs in the network.

Chlorine –  CL10 Chlorine Analyzer

Chlorine measurement with this amperometric analyzer does not require reagents, eliminating the need for routine reagent replacement and waste stream management. The method used in the CLF10/CLT10 analyzer is USEPA compliant according to Method 334.0 and can be used for reporting chlorine residual measurements.

Turbidity – 1720E Turbidimeter

Continuously flowing sample enters the turbidimeter body and flows through a bubble trap designed to vent any entrained air bubbles from the sample stream. Turbidity is measured by directing a beam of light from the sensor assembly into the sample in the turbidimeter body and measuring the scatter light at 90 degrees with a photocell. The amount of light scattered is proportional to the amount of turbidity in the sample. Corrosion products and biogrowth can elevate the turbidity level in the distribution system above that of the plant effluent. The “E” uses USEPA approved method 180.1.

pH and Conductivity – Probes from GLI

A patented differential pH measuring sensor provides information on the acid/base nature of the water. A two electrode conductivity sensor measures the total ionic concentration in the water.

Organics – UVAS sc Sensor (Reagentless WDMP sc only)

Continuously protect plant treatment processes from high influent organic loads.  The UVAS sc Sensor measures UV light transmittance for sudden changes in organic loads that would require alternate treatment procedures.  Changes in UV transmittance can result from different reasons – storm events to accidental spills of organic nature – and should be considered in the distribution system for optimized event detection and process control.  This easy to maintain sensor has a built-in wiper that automatically cleans the detector windows, eliminating surface films or particles that could diminish accuracy.

Temperature

Temperature is measured to ensure the probes are measuring correctly and for other generic water quality information.

Sample Pressure

The sample pressure is measured to ensure the sample going to the panel is within the specified range.

These measurements are sent continually via digital transmission to the Event Monitor. The Water Panel is smaller, lighter and easier to use than the original panel. The panel is even small enough to fit down a manhole. The newly designed sensor manifold eliminates flow meters and makes calibrations more convenient and efficient for operators.

The Water Panel is comprised of several of Hach’s premier water quality sensors including the CL17 Chlorine Analyzer, 1720 E Turbidimeter, and a GLI pH and Conductivity Probes.

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