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Pulsar Process Measurement Ltd design, manufacture and market level, volume, open channel flow, pipe flow and pump control instrumentation. Our company specialises in non-intrusive measurement, and our technology is used in a wide variety of industries and applications worldwide. By concentrating on the development of ultrasonic level measurement, we believe that Pulsar can be fairly described as the world technology leader in this field. The product range has been designed to provide a full range of alternatives, from single point of measurement installations right through to complex multi-point applications with digital communications. The ultrasonic range has been augmented with other products, so for the water industry, interface monitors for tricky sludge level measurement application have been added together with units that can be used to warn of pump failure. In more general level applications, single point measurement devices are available where continuous level measurement is inappropriate.


Mr Alistair MacKinnon
Cardinal Building, Enigma Commercial Centre
Sandy's Road
WR14 1JJ

Pulsar's Sludge Finder 2 gives a blanket improvement at Talybont

Pulsar Process Measurement have supplied a Sludge Finder 2 sludge level measurement system as part of Welsh Water's Talybont-on-Usk treatment works developments, providing accurate measurement that allows optimisation of sludge thickness and the production of a consistent solids content within the final sludge perfect for onward pumping and processing.

As often happens with instrumentation installations, the Sludge Finder is a small but vital component in a much larger project. In this case the 70 MLD treatment works was supplied with a new DAF (dissolved air flotation) treatment process that leads on to a new sludge treatment facility where the Pulsar unit was sited.

The sludge treatment plant features two picket fence thickeners treating the sludge from the DAF process plus dirty water from two other areas of the works. Polyelectrolyte is dosed into the feed to aid settlement and the final sludge is removed from the thickeners using positive displacement pumps.

Sludge Finder 2 was selected and installed by Black and Veatch, who chose it on the basis of previous installations that had proven exceptionally reliable, giving them the confidence that Sludge Finder 2 would successfully handle the mixture of sludges from different processes that gave a variable composition going into the thickeners.

Pulsar are experts in acoustic technologies, supplying ultrasonic level and flow measurement globally. Sludge Finder 2 operates on a similar principle, featuring Pulsar's Viper self-cleaning transducer, which emits a sonar pulse that 'bounces' off the top of the sludge blanket.

The key to the success of the Pulsar unit is its exceptionally sophisticated echo processing software that makes sense of the signal, possibly including numbers of competing and conflicting signals, to zero in on the accurate level. The Sludge Finder unit then gives a number of options of digital or analogue outputs for alarm or control.

At Talybont, the on-site SCADA system is used to remotely control pump operation to maintain the pumped sludge dry solids content at an extremely consistent 4%.

For further information please email Pulsar Process Measurement Ltd

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