SENSOR DDS® LID

patented system for pipe leak location



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What is SENSOR DDS® LID



SENSOR DDS® LID (Linear Impedance Detector) is a unique, new and patented system for direct pipe leak location. It consists of an elongated sensor (sensing element - SE) installed roughly parallel to the new pipe within the trench and connected to a specially developed transceiver unit. An added benefit of measuring the material around the pipe is that sound, temperature, pressure, flow, transients and other parameters related to the pipe and itself become irrelevant.
This new SENSOR DDS® Technology brings another level of "security in supply" knowing your installed pipe network can be tested and monitored in real time for leakage. This leakage can be accurately and unambiguously located.



How SENSOR DDS® LID works



The technology permits the measurement of the electric permittivity of the soil around the pipe (a low power microwave frequency signal) meaning that the leakage is directly detected in the material around the pipe itself. An added benefit of measuring the material around the pipe is that sound, temperature, pressure, flow, transients and other parameters related to the pipe and itself become irrelevant. Therefore, it avoids all of the issues of historical leak detection and location techniques by avoiding all traditional parameters.
Due to its intrinsic nature the LID system will work with any pipe material (e.g. concrete, metallic [ferrous and non-ferrous], all plastics, grp, even brickwork!).


Where to use it and aplications



Different configurations are necessary depending firstly on whether the installation of an SE will be in conjunction with:
(A) a new pipe installation
(B) an existing pipe installation:
(A) - With respect to the installation of an SE all new pipe installations are the same, irrespective of the material of the pipe, it is simply necessary to install the SE roughly parallel to the new pipe within the trench. This is the simplest installation and requires no special skills, it would therefore be an additional item for the pipe installation team to place. A small inspection chamber (e.g. 300 x 300 x 300) is necessary between SEs spanning in opposite directions. This inspection chamber is where the SE plugs into the measuring equipment.
(B) - Installation for existing pipelines obviously requires a slightly different approach. Firstly, there are two subsets of installations to existing pipelines, namely metallic pipes and all other types of pipe.
(A) - With respect to the installation of an SE all new pipe installations are the same, irrespective of the material of the pipe, it is simply necessary to install the SE roughly parallel to the new pipe within the trench. This is the simplest installation and requires no special skills, it would therefore be an additional item for the pipe installation team to place. A small inspection chamber (e.g. 300 x 300 x 300) is necessary between SEs spanning in opposite directions. This inspection chamber is where the SE plugs into the measuring equipment.
(B) - Installation for existing pipelines obviously requires a slightly different approach. Firstly, there are two subsets of installations to existing pipelines, namely metallic pipes and all other types of pipe.
Metalic pipes - Existing metallic pipes permit the opportunity to use the pipe itself as a ‘pole’ (in the electrical sense). This means that in the case of metallic pipes, which represent the majority of existing pipelines, it is possible to create a shallow ‘micro trench’ (or even saw cut) into which the SE can be inserted. The depth of installation is only determined by a depth necessary to protect the SE during service, where a minimum of 300mm is recommended. The pipe is exposed to create a connect thereto and small manhole is created there for future access and also to house the connections to two SEs spanning in different directions from the manhole itself.
All other types of pipe - Existing non-metallic pipes require the SE to be ‘dipped’ into small bore holes so that the SE travels along the pipe direction, then down and back up inside each bore hole over the existing pipe at 3.6m intervals.
Whichever installation process is used the current limit of a single is SE is 300m, each zone is therefore 600m (300m in either direction from the manhole). For existing non-metallic pipes, the zones are shorter by virtue of the dip into each borehole.
Metalic pipes - Existing metallic pipes permit the opportunity to use the pipe itself as a ‘pole’ (in the electrical sense). This means that in the case of metallic pipes, which represent the majority of existing pipelines, it is possible to create a shallow ‘micro trench’ (or even saw cut) into which the SE can be inserted. The depth of installation is only determined by a depth necessary to protect the SE during service, where a minimum of 300mm is recommended. The pipe is exposed to create a connect thereto and small manhole is created there for future access and also to house the connections to two SEs spanning in different directions from the manhole itself.
All other types of pipe - Existing non-metallic pipes require the SE to be ‘dipped’ into small bore holes so that the SE travels along the pipe direction, then down and back up inside each bore hole over the existing pipe at 3.6m intervals.
Whichever installation process is used the current limit of a single is SE is 300m, each zone is therefore 600m (300m in either direction from the manhole). For existing non-metallic pipes, the zones are shorter by virtue of the dip into each borehole.
Two variants are available for measuring the installed SE a mobile measuring device and remote measuring devices
The mobile measuring device can be connected to any installed SE measurements are automatic, but the equipment must be manually carried to the inspection chamber and connected to the SE. The mobile unit connects by WIFI to the operator’s laptop which runs the LID interrogation software, the measuring device is small and lightweight containing its own battery which holds enough power to run for several days between charges.

 The remote device is connected to the SEs in the inspection chamber and will run autonomously. In the event of a leak the system will report to a SCADA network that a leak has occurred along with the position of the leak expressed in linear meters along the affected SE.
Two variants are available for measuring the installed SE a mobile measuring device and remote measuring devices
The mobile measuring device can be connected to any installed SE measurements are automatic, but the equipment must be manually carried to the inspection chamber and connected to the SE. The mobile unit connects by WIFI to the operator’s laptop which runs the LID interrogation software, the measuring device is small and lightweight containing its own battery which holds enough power to run for several days between charges.

 The remote device is connected to the SEs in the inspection chamber and will run autonomously. In the event of a leak the system will report to a SCADA network that a leak has occurred along with the position of the leak expressed in linear meters along the affected SE.
All SEs have a unique electronic ID against which the following information is recorded at the time of installation: GPS position of each end, exact length and signature (1st) measurement. This baseline information is subsequently used to determine leaks, breaks in cables caused by 3rd parties and of course the GPS position the leak / break.
Sensing Elements are durable with a design life of 120-years with a warranty of 30 years, in the event of damage to an SE these are easily repaired without the need for replacement of the entire SE.
Additional advantage of the buried SE is the long-term possibilities to use it as tracing item for determining exact position of the pipe in term of its mapping or excavation or its protection in terms of other nearby earth work. Leaking water pipes are a huge global issue. Leaking pipes cause subsidence and unseen structural damage as well as sink holes and damage to roads and private property. Sensor DDS® LID can be applied to all pipe networks and all sizes of pipe. As the system is unaffected by the pressure inside the pipe, this even means that the measurement of leakage from sewer pipes is easily achieved. Even unburied pipes can be monitored by affixing the LID SE to the pipe using zip ties.

 Applications:
● Sewage / Waste Water
● Potable Water Distribution
● Chemical Business
● Oil Distribution, Pipeline
● Pipes of any size and material
All SEs have a unique electronic ID against which the following information is recorded at the time of installation: GPS position of each end, exact length and signature (1st) measurement. This baseline information is subsequently used to determine leaks, breaks in cables caused by 3rd parties and of course the GPS position the leak / break.
SEs are durable with a design life of 120-years with a warranty of 30 years, in the event of damage to an SE these are easily repaired without the need for replacement of the entire SE.
Additional advantage of the buried SE is the long-term possibilities to use it as tracing item for determining exact position of the pipe in term of its mapping or excavation or its protection in terms of other nearby earth work. Leaking water pipes are a huge global issue. Leaking pipes cause subsidence and unseen structural damage as well as sink holes and damage to roads and private property.

Sensor DDS® LID can be applied to all pipe networks and all sizes of pipe. As the system is unaffected by the pressure inside the pipe, this even means that the measurement of leakage from sewer pipes is easily achieved. Even unburied pipes can be monitored by affixing the LID SE to the pipe using zip ties.

 Applications:
● Sewage / Waste Water
● Potable Water Distribution
● Chemical Business
● Oil Distribution, Pipeline
● Pipes of any size and material
Additional advantage of the buried SE is the long-term possibilities to use it as tracing item for determining exact position of the pipe in term of its mapping or excavation or its protection in terms of other nearby earth work. Leaking water pipes are a huge global issue. Leaking pipes cause subsidence and unseen structural damage as well as sink holes and damage to roads and private property.

Sensor DDS® LID can be applied to all pipe networks and all sizes of pipe. As the system is unaffected by the pressure inside the pipe, this even means that the measurement of leakage from sewer pipes is easily achieved. Even unburied pipes can be monitored by affixing the LID SE to the pipe using zip ties.

Applications:
● Sewage / Waste Water
● Potable Water Distribution
● Chemical Business
● Oil Distribution, Pipeline
● Pipes of any size and material


Why SENSOR DDS® LID is so unique



The Sensor DDS® LID product is unique in that it measures the soil for actual leakage, this means that leakage can be caught at a very early stage that is currently not possible with existing techniques. In addition, pipe made of plastic or of large diameters that present a problem for sound-based leak location systems present no issue to LID. This coupled with the fact that LID is networkable and retro fittable means that at last a truly smart pipe monitoring system has arrived that is fit for purpose in the smart cities of the future.
Even where water is in relatively plentiful supply, water companies face huge costs associated with leakage and the 3rd party damage that results from leakage. Installation of partially effective low-resolution systems is already widespread. The cost of the LID system is less costly than others and provides high resolution leakage information.


Where to get it



Available lengths of Sensor DDS LID are 50, 100, 150, 300 meters now. We are sending product worldwide.
Simply use the contact form for requests or for more informations.

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Other Leak location Applications

basins, ponds, tanks, leach pads, tailing dams, storm ponds, landfill cells, green and other flat roofs, landfill caps, tunnels, building foundations, canals and other containment facilities
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