42 Water / Wastewater


Water Pressure Transient Loggers Solve Burst Mystery in County Kilkenny


Pressure Transient Loggers (PTLs) from multi- utility monitoring and telemetry specialist HWM have solved the problem of repeated water main bursts in County Kilkenny, Ireland.


EMR Integrated Solutions and Kilkenny County Council (KCC) set up a pilot scheme to investigate the advantages of deploying PTLs on water distribution networks on a permanent basis. EMR and KCC installed two HWM PTLs on the network in South Kilkenny, at Owning and Piltown.


The selected section of the network had been prone to occasional bursts. The traditional course of action was to repair the pipeline until funding was made available to replace the pipeline completely.


Both PTLs were located upstream of a pressure reducing valve (PRV) and connected to hydrants for the duration of the pilot. The PTLs were totally enclosed in the hydrant chambers, communicating via GPRS. Agnostic SIMs allowed for automatic best-network selection for data transmission. HWM’s free programming software enabled engineers to carry out a GPRS test directly from the logger in the chamber.


Following a burst, EMR retrieved data from the nearest PTL, three kilometres from the burst location. Analysis of the data showed two transient notifications occurring on a daily basis at 5:04 and 23:10. There were also multiple transient notifications that coincided with the burst on the pipeline.


After the burst repair was carried out, EMR installed a second PTL closer to the burst location. The two transient notifications still occurred on a daily basis at the same times, while the pressure transient events were dramatically larger than the original transient recording.


EMR investigated further with council staff and discovered that the local PRV, which was installed to conserve water, was actually causing the pressure transients. The PRV had a day / night controller set to operate daily at 5:00 and 23:00.


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Lovibond® Tintometer®


41816pr@reply-direct.com Water Testing Group Waste Water Analysis made easy


When you are monitoring water in the field, you need easy to use, robust and reliable equipment that’s easy to transport. The AP-2000 and GPS Aquameter, from Aquaread, define easy to use, allowing you to capture a vast amount of data by the press of a single button. Calibration is also kept simple using the supplied RapidCal multiparameter calibration solution.


The Aquaprobe begins to measure all of your important water quality parameters as soon as it’s switched on, and gives an audible notification when all readings are stable, making your job easier when taking readings. The GPS Aquameter gets your location in less than a minute, providing location data with every dataset you record; you will always know where your data was captured when using the Aquameter.


The AP-2000 Aquaprobe comes with an impressive array of included sensors and has


BOD-System BD 600


■ User friendly / large brilliant graphic display ■ Graphical representation of measured values ■ Datatransfer via USB & SD Card interfaces ■ Mercury-free, environmentally-friendly ■ User-selectable time span from 1 to 28 days ■ Individual programming of each of the 6 samples ■ Inductive stirring system 110 - 240 V / 50 - 60 Hz


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www.lovibond.com bd600_155x210_gb.indd 1 7780ad@reply-direct.com IET March / April 2017 www.envirotech-online.com


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27.02.17 10:17


QUALITY Made in GERMANY


multiple customisation options to suit your ever-changing monitoring requirements. A combined optical dissolved oxygen, conductivity and temperature sensor is fitted as standard to the AP-2000. This space saving innovation allows more sensors to be fitted to the probe than any other multiparameter water-monitoring probe. A combined pH/ORP sensor is also included, and various calculated parameters such as salinity and total dissolved solids also come as standard.


There are various customisation options available with the AP-2000 Aquaprobe. You can add a depth sensor to allow you to record water level changes with 0.5% FS accuracy, you can add one of our optical sensors such as turbidity or chlorophyll, or you can add an ion selective electrode such as ammonium or nitrate, allowing an unrivalled 13 parameters to be recorded simultaneously within a 2” diameter probe.


Sensors are user exchangeable which gives the flexibility to customise the sensor layout according to your job requirements. All of this comes packed in a rugged carry case which is fully sealed and vented, with foam cutouts to keep your equipment safe when traveling from location to location.


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Portable, Accurate and Reliable Water Quality Packages


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Flow Metering using Radar for Ex-Zone1


The OFR flow sensor by NIVUS GmbH was approved for use in Ex-Zone 1 by TÜV Nord. In addition to ATEX approval required mainly in Europe the company was approved according to IECEx standard which is preferably demanded in English- speaking countries.


This allows contactless flow measurements in many applications including sewers. In order to obtain the Ex approvals a new sensor material was used and the sensor dimensions have been slightly modified. A non-Ex version of the radar sensor continues to remain available.


The flow sensor features IP 68 protection and thus is suitable for use particularly in harsh environments. In addition to the radar sensor NIVUS provide a modular holder bracket made of stainless steel for easy installation. The basic module enables mounting of the radar sensor. An extension allows installation of an extra IP 68 level sensor. Moreover the manufacturer provides an optional casing which covers both sensors in a compact enclosure.


Due to low space requirements the compact housing is suitable for installation even in cramped places or in locations where access is difficult. The contactless measurement and the compact construction of the radar system allow installation without the need to shut down processes.


Flow metering using radar sensors is suitable particularly for applications conducting aggressive or abrasive media. Another feature of the radar measurement system is the use in applications with shooting discharge and low flow levels.


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