Flow is used to determine consumption, either from consumers or supply to a particular part of the network. By knowing network supply and consumer consumption, water loss in the distribution network can be calculated. Flow changes over time can also indicate water loss.
Flow meters are also used to set up a District Metered Area (DMA). A DMA is an area of between 500 and 3000 properties into which water can be measured and analysed to determine the level of leakage. This is called leakage monitoring, and should be introduced in order for leak localising to be truly effective. Each DMA requires a defined and permanent boundary, and flowmeters are used to record the flow into each zone.
We supply four different types of advanced flowmeters to monitor water flow in the network.
Insertion Flow Meter
Temporary or permanently installed Insertion flow meters can provide a highly economic flow monitoring solution. They are also useful as a portable survey tool where occasional measurement is needed at many points. Insertion and removal can be carried out without supply disruption.
The electromagnetic insertion flow meter is one of the most accurate flow and pressure measuring devices available on the market, particularly at low flows. Designed for use in survey applications such as leakage monitoring and network analysis, the electromagnetic insertion flowmeter is available with an optional display panel and features advanced processing techniques to provide high accuracy even at low flow rates. The flow meter comes with an on board micro-controller to enable a wide variety of sampling options to be set up.
Probes can be supplied in 4 different insertion lengths depending on the pipe size, and can be quickly connected to computer devices, external loggers or SCADA systems. The device can operate using mains or battery power. Two site replaceable batteries provide 30 months battery power logging at 30 second samples. The head is 100% watertight and programmable to give spot values and totalised readings in forward or reverse direction.
Ultrasonic Clamp-on Flow Meter
Non-invasive, ultrasonic flow meters offer multiple benefits in many applications. By using ultrasonic transducers clamped to the outside of pipework, there is no disruption of flow or service downtime.
Ultrasonic flowmeters use transit time technology (also known as 'time of flight'). The principle behind this method of flow measurement is that acoustic waves are emitted from one of the transducers to the other side of the pipe and back to the second transducer and the time taken for the signal to travel is stored. This process is then reversed with a signal being sent from the second transducer being received by the first. The differential transit time of the synchronised signals is proportional to the flow rate of fluid through the pipe.
The clamp on transit time flow meter uses advanced digital technology to achieve stable non invasive flow measurements even in difficult conditions and on most pipe materials. Highly accurate even at low flows, the flow meter features a built in data logger, a long battery life (80 hours) and can run on mains power if a permanent installation in required. Clamp on meter has no contact with the fluid in the pipe so is suitable for drinking water and effluents. It features an LCD screen which displays flow rate in both directions. It is easy to install with no loss of pressure or risk of leakage, and can be used on a wide range of pipe sizes.
Ultrasonic Bulk Flow Meter
This new meter, having both superior hydraulic performance as well as advanced alert, data and statistical features, will naturally lead the world of water management. We supply the utility with a range of effective tools to manage and control its water, gas & electricity network. The system includes detection modules such as:
The leaks detection module maps the physical network structure into groups. Utilizing a smart algorithm, it is able to calculate even the slightest water loss within any specific group, or between main groups and sub-groups.
The system is specially programmed to "know" how to identify water theft; either directly from the meter or from the line (between meters). It immediately alerts the utility customer by mail, fax or cellular phone.
The system is also capable of identifing deliberate damage to the meters, and immediately alerts the utility customer by mail, fax or cellular phone.
The system recognizes if a meter is installed incorrectly, in the wrong direction, or has been deliberately altered by the end user. The meter sends an alert notification that consumption is flowing in the wrong direction.
Electromagnetic Full-bore Flow Meter
Electromagnetic flowmeters can measure, indicate and store flow and passed through volume data of conductive liquids. Flow meter records both positive and negative flow. As there are neither moving nor mechanical parts in the flow profile the device can be applied to measure extremely polluted liquids containing even solid pollution. The only limitation is that the device can be used solely with conductive liquids. Inductive flow meter is suitable to be used in the chemical industry, paper industry, waterworks, waste-water etc. If required, the flowmeter meets requirements of standards for equipments intended for use in potentially explosive atmospheres according to directive 94/9/EC. Sensor category is II 3G EEx nA II T5/T6.