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Intellitect Water has revealed that its Intellisonde in-pipe water quality monitor is being assessed by the US Environmental Protection Agency (EPA) for use in improving water security.

The monitor is being assessed in a simulated network at the US EPA’s Ohio Test and Evaluation Facility.

The project’s work on water quality sensors is in support of the Water Security Initiative, which is developing contaminant warning systems and addressing the risk of intentional contamination in drinking-water distribution systems.

The trial with the Intellisonde has been underway for more than a year.

John Hall from the EPA said: ‘We have monitored a number of parameters such as pH, conductivity, ORP and temperature, however, the chlorine and flow data have proved to be particularly useful.

‘Free chlorine levels, for example, are significantly affected by a broad range of contaminants and the flow data can be used to reduce alarms due to operational events.

‘Overall, the Intellisonde has provided reliable chlorine data for more than six months without changing the probe, which represents an improvement in this principle of detection.

‘Widespread deployment of solid-state chlorine probes within the US water distribution network will be dependent largely on the reliability of the data and the cost of operation and maintenance for the sensor.

‘Additionally, the Intellisonde has been ease to use once aligned in the pipe properly and we look forward to reporting further findings as the project progresses,’ he added.

Developed to continuously monitor up to 12 parameters within drinking water distribution networks, the Intellisonde can be inserted into pressurised pipes through a 11/2in valve.

Measurement options include: free chlorine; total chlorine; mono-chloramine; dissolved oxygen; conductivity; pH; ORP/redox; flow; pressure; temperature; turbidity; and colour.

None of these requires membranes or reagents and the sondes can be deployed for long periods without the need for frequent recalibration or maintenance.

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