Streaming current monitor converted into a coagulation controller

In 2022, Uisce Eireann announced a €12 million upgrade to the water treatment works in Lettermacaward, Ireland.  The Asset Delivery Regional Lead with Uisce Eireann said:

“This investment in local water infrastructure will improve drinking water quality and security of supply in this popular tourist area”

As part of this upgrade, Uisce Eireann invested in Pi’s streaming current monitor, StreamerSense. The main application for streaming current monitors is in improving coagulation control in drinking water. StreamerSense does this by measuring the residual charge on coagulated water, which provides a measure of how much positively charged coagulant is required to achieve charge neutralisation in raw water.

Fast forward to 2025, Uisce Eireann got in touch with Pi because they wanted their current measurement parameters to work more synergistically as one coagulation controller. As the StreamerSense utilises a CRIUS®4.0 instrument controller, this was relatively straightforward. Pi’s service engineer simply used Modbus communications to allow the CRIUS®4.0 to collate and monitor the data inputs of the independent free chlorine, total chlorine, pH and turbidity parameters. This effectively produced a coagulation controller, to allow for more efficient monitoring and control.

A key advantage of Pi’s products lies in their modular nature, which enables seamless integration of additional components and retrofitting of existing systems. Designed with interoperability and scalability in mind, each module can be independently upgraded or replaced, minimizing downtime and reducing total cost of ownership. This flexibility ensures that systems built with Pi products can evolve alongside emerging technologies and shifting operational requirements, without the need for complete overhauls.

Here is a customer testimonial so you can see how Pi’s coagulation controller can add value to a drinking water site or speak with our team to learn how Pi’s modular solutions can fit seamlessly into your existing setup. To read more about the project at Lettermacaward, visit the Uisce Eireann website here.