ENTEK xvi UK Focus - Water / Wastewater
Flow Meter Saves Welsh Water £1.5 million and Wins National Award
At the Institute of Water President’s Dinner, held on June 6th, Pulsar Process Measurement’s (UK) non-invasive flow monitor, Flow Pulse, won the prestigious National Innovation Award. Developed in co-operation with Dwr Cymru Welsh Water (DCWW)’s Innovation Team, Flow Pulse is aiding Compliance and Asset Management throughout the Region by monitoring flow rates within critical Sewage Pumping Stations (SPS) under both normal and storm conditions, showing huge savings when compared with Magflow meter installation costs.
Measurement of flow within SPS provides vital information for both management and regulators. Total throughput can be monitored, but more importantly flow can be compared with other data from the SPS control system to determine the relative performance of the pumps so, for example, maintenance can be planned and efficiencies maximised. Pumped volumes also warn of upstream or downstream emergencies such as a blocked or burst main. In addition, important information can be provided to regulators such as the EA, for example to confirm that pumps were performing during extreme storm conditions.
With water quality becoming more important, the measurement of pH to monitor this also increases in importance. Where it is necessary to do conti nuous measurements, those carrying out this functi on fi nd their biggest problem is having to frequently check the calibrati on. With this in mind, SENTEK developed a range of Solid Gel Electrodes. The gel retains salt, and allows zero potenti al to be maintained for a much longer period of ti me. The mechanical strength of the gel permits the use of a juncti on with a much higher
porosity than previous designs.
THIS MEANS: • Faster response to equilibrium • Improved accuracy • Longer electrode life • Less frequent calibrati ons • Greater stability • Opti mum performance in cold water
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DCWW identified the requirement for around 250 monitoring points across their network of SPS. 250 Magflow meters would have been prohibitively expensive to implement, taking into consideration the cost of the instruments, the tankering and logistics during the process interruption involved and the direct cost of installation.
The DCWW Innovation Team approached Pulsar Process Measurement for a solution. Pulsar had been developing Flow Pulse, a new concept that uses advanced digital Refracted Spread Spectrum Analysis (RSSA) within a clamp-on, non-invasive flow monitor. DCWW saw the potential of the technology and worked closely with Pulsar’s R&D team to provide trial sites along with invaluable detailed feedback and support that allowed Pulsar to complete product development quickly and effectively.
Pulsar’s Flow Pulse has a minimal installation cost, only requiring a simple screwdriver to mount, and there is no interruption to the process. DCWW estimate that they will see a resulting saving compared to Magflow meters of £1.5 million over the full project, an average of £6,000 per installation. Flow Pulse has also found favour in other Water companies, with over 1,000 now having been installed in the UK.
Commenting at the Awards Ceremony, Alistair Mackinnon, Pulsar’s Director of Sales and Marketing, said; “We are investing a lot of money into Research and Development to help innovation in the water industry, and this award is incredibly prestigious. R&D is the lifeblood of Pulsar and innovation is in our DNA. We rely on partnerships with the water industry, and feedback from them has helped develop many of our products, as we can see from tonight.”
Carle Redwood, DCWW Snr Innovation Engineer commented that, “this is a great example of R&D collaboration between a Technology provider and Water Company in providing Innovative solutions to meet the challenges of AMP 6 and beyond”.
Instrumentation Manufacturers to Showcase Submersible Gauging Level Transmitters at WWEM 2014
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On stand 144 at the Water, Wastewater & Environmental Monitoring (WWEM 2014) exhibition, from 5-6 November 2014 in Telford, instrumentation specialist Impress Sensors & Systems Ltd. (UK) will be showcasing a number of submersible level, pressure and temperature transmitters.
For visitors to stand 144, the main focus will be on the new IMTG range of gauging level transmitters, manufactured in the UK by Impress Sensors. The transmitters are designed for continuous submersion in liquids such as water, fuels and oils, but have been redesigned to better suit the applications and the range extended to include a new plastic (Delrin) version and a digital RS485 Modbus version.
02/07/2014 15:56
IMTG transmitters are suitable for applications in small (1 metre to 10 metre depth) tanks or containers, where conventional mechanical level switches and sensors are not suitable because of reliability
issues and a higher degree of level ‘control’ and measurement is required. Typical applications include measurements of static tank level, container or chamber level, and vehicle tank level, as well as rainwater-harvesting systems, standby generator fuel monitoring equipment, and asset monitoring of IBCs (intermediate bulk carriers) and storage tanks. Water-approved versions of the transmitter are also available for drinking water applications.
The IMTG transmitters use a piezoresistive, silicon pressure sensing technology and a stainless steel diaphragm, which provide excellent stability, repeatability and resolution. The sensor housing is made from stainless steel, making it ideal for reliable, repeatable hydrostatic level measurement. An engineering polymer (DuPont Delrin) version is available for use in corrosive media such as diesel, petrol and other aggressive chemicals. This is particularly useful when the tanks have external earthing issues that would normally affect metal products. This is common in remote telemetry sites with standby generators.
The sensors are available in nominal pressure ranges from 1.0mWG to 10mWG. A variety of cable materials are available, including PUR as standard, with PVC, FEP and TPE as options, enabling compatibility with any media.
All IMTG sensors are temperature-compensated, calibrated and supplied with a traceable serial number and calibration certificate. Operating (media) temperatures are from -20°C to +60°C in non-freezing media.
An RS485 Modbus version of the IMTG range (and other submersible transmitter ranges) will also be launched at the show. These transmitters are supplied with a digital RS485 interface and Modbus RTU output. The electronics incorporate a microprocessor-based amplifier, with level and temperature measurements made possible by RS485 Modbus RTU serial communication. Impress provides a standard software package, which enables the user to re-range, calibrate and adjust some parameters of the device. There is also a facility to data log via the software, which is useful for checking installation and behaviours of the application.
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