Geomembrane Leak Detection
and Liner Integrity Monitoring
SENSOR DDS®

Since 1990, we have been delivering innovative solutions for waterproofing and geomembrane liner integrity control. SENSOR DDS® technology combines advanced Electrical Leak Location (ELL) with precise monitoring to protect projects across millions of square metres worldwide.
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Geomembrane and Waterproofing Liner Integrity Testing

For more than 35 years, Sensor, spol. s r.o. has been recognised as an established technology leader in non-destructive leak detection and damage detection for waterproofing liners and geomembranes. Through continuous development, long-standing expertise and a strong technical background, the company has built a solid position both at home and on international markets. Sensor has also developed a strong and internationally recognised brand, with its solutions deployed in projects for some of the largest industrial operators worldwide.
Our proprietary geoelectric measurement systems, continuously refined over many years, make SENSOR DDS® an intelligent and innovative leak detection solution, enabling the pinpoint location of even the smallest leaks in real time. Based on Electrical Leak Location (ELL) principles, these advanced technologies help prevent water loss and subsoil contamination before minor defects develop into serious failures.
We develop and implement intelligent mobile and permanent monitoring systems that enable geomembrane and waterproofing liner testing not only before cover placement, but throughout the entire service life of the structure. Proven through years of field experience and deployed on projects worldwide, our SENSOR DDS® solutions significantly improve liner integrity control and deliver long-term reliability customers can depend on.
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Monitoring únikov z geomembrán a fólií - Svetový líder Sensor
Sensor DDS - ELL

SENSOR DDS® Solutions Across Industries
- technology trusted worldwide

Geomembrane-lined tailings pond with SENSOR DDS® monitoring equipment powered by a solar panel Mining Industry Tailings storage pond with an exposed embankment tested for liner integrity using SENSOR DDS® MIT and Mobile methods Tailings Dam Geomembrane-lined stormwater pond in a mining area monitored for leaks with SENSOR DDS® Storm Pad Process pipes installed over the geomembrane of a pregnant pond inspected using SENSOR DDS® MIT Pregnant Pond Terraced leach pad at a mining site monitored for geomembrane leaks with SENSOR DDS® Leach Pad
Concrete structure under construction with waterproofing integrity monitored using SENSOR DDS® Construction Industry Vegetated roof with a waterproofing membrane monitored for leaks using SENSOR DDS® Green Roofs Foundation reinforcement installed over a waterproofing membrane tested with SENSOR DDS® before concreting Building Foundations Technician using SENSOR DDS® to locate leaks in the waterproofing membrane of a flat roof Flat Roofs Empty swimming pool lined with a waterproofing membrane undergoing integrity testing with SENSOR DDS® Swimming Pools
Technician testing the waterproofing liner of a thermal power plant ash pond using SENSOR DDS® Energy Industry Geomembrane-lined irrigation canal running between agricultural fields and monitored with SENSOR DDS® Agriculture Industry Storage tanks and processing columns at a petrochemical refinery protected by SENSOR DDS® waterproofing monitoring Oil and Gas Industry Concrete dam with a spillway in a mountain valley monitored for watertightness using SENSOR DDS® Dams and Water Reservoirs

Advanced Smart Geomembrane Leak Detection Technologies for Waterproofing Systems

SENSOR DDS® represents a suite of advanced Electrical Leak Location (ELL) technologies designed for waterproofing system and geomembrane liner integrity control. These solutions enable precise real-time leak location, long-term monitoring and quality control throughout the entire service life of the liner.
  • Advanced Electrical Leak Location (ELL) for waterproofing liners and geomembranes
  • Precise leak detection and location without intrusive work on the structure
  • Geomembrane and liner testing before cover placement and during operation
  • Real-time pinpoint location of even minor leaks and defects
  • 24/7 long-term liner integrity monitoring
  • Continuous quality control throughout the service life of the waterproofing barrier
  • Technologies designed for critical infrastructure and industrial projects
  • Proven SENSOR DDS® solutions deployed on projects worldwide

Exposed Geomembrane Arc Testing

Exposed liner arc testing using the SENSOR DDS® MIT Arc Tester is a modern technology designed for integrity testing of exposed waterproofing liners in accordance with ASTM D7953. It enables accurate detection of leaks, damage and faulty welds in non-conductive materials such as PVC, TPO and HDPE geomembranes, as well as bituminous membranes, helping ensure reliable waterproofing system testing before cover placement or commissioning.

More Information about Exposed Geomembrane Arc Testing

Covered Geomembrane Testing

SENSOR DDS® Mobile uses the Dipole Method for precise waterproofing liner integrity testing, even when the liner is covered by a protective or drainage layer. The technology makes it possible to reliably locate leaks beneath materials such as gravel, soil, concrete or various liquids, without the need to uncover the waterproofing system itself. This makes the inspection fast, efficient and suitable even for large waterproofing areas.

More Information about Covered Geomembrane Testing

Continuous Waterproofing Monitoring

SENSOR DDS® offers three levels of online waterproofing monitoring - from the LAM alarm module and semi-automatic 24/7 RMS supervision to the fully automatic CMS system with precise damage location. Each solution uses a network of embedded sensors and automatically notifies responsible personnel by SMS or e-mail when a leak occurs. The right level of protection depends on the type of structure, risk level and required response speed.

More Information about Continuous Waterproofing Monitoring

Periodic Waterproofing Monitoring

SENSOR DDS® LMS provides periodic waterproofing monitoring through a network of sensors permanently embedded beneath the liner. If a leak occurs, the system immediately triggers a visual and audible alarm and automatically sends a notification by SMS or e-mail. The result: fast response, minimal damage and verifiable real-time control of the liner integrity.

More Information about Periodic Waterproofing Monitoring

SENSOR DDS® Systems Across Industrial Sectors

SENSOR DDS® systems are successfully used in a wide range of industrial sectors, including:

  • Mining Industry – leach pads, tailings dams, process ponds, stormwater ponds and similar containment structures
  • Waste Management – Landfills – municipal solid waste landfills, hazardous waste landfills, retention ponds and landfill rehabilitation projects
  • Water Management Structures – drinking water reservoirs, lakes, dams, potable water pipelines and sewer pipelines
  • Construction Industry – building foundations, green roofs, flat roofs and data centre roofing systems
  • Oil and Gas Industry – refineries, petrochemical plants, storage tanks, storage terminals and industrial process areas
  • Agriculture Industry – irrigation canals, retention ponds, water management systems and structures for efficient water use
  • Energy Industry – tailings ponds, lagoons, ash disposal facilities, water systems, reservoirs and power plant infrastructure
  • Dams and Water Reservoirs – large water reservoirs, geomembrane liners, hydraulic engineering structures and safety monitoring of water infrastructure
SENSOR DDS® technology has been deployed on more than 2,485 projects worldwide – from waste landfills, mining operations and water reservoirs to the oil and gas industry, agricultural irrigation systems, energy facilities, water dams, modern data centre roofs and other industrial structures.

To learn more about the history of Sensor, spol. s r.o., you can also read the article published about our company by the renowned Forbes magazine.

Why Choose SENSOR DDS® Technology

35+ Years of Expertise

Since 1990, Sensor has been developing advanced leak detection, Electrical Leak Location (ELL) and liner integrity monitoring technologies for demanding waterproofing projects worldwide.

Pinpoint Leak Location

SENSOR DDS® identifies and locates even very small liner defects, including leaks smaller than 1 mm, helping operators detect problems before they develop into costly failures.

Global Project Experience

SENSOR DDS® technology has been deployed on more than 2,485 projects worldwide, protecting geomembranes, waterproofing liners and containment structures across multiple industries.

Environmental Protection

Early leak detection helps prevent soil and groundwater contamination, reducing the risk of environmental incidents in landfills, reservoirs, industrial facilities and critical infrastructure.

24/7 Liner Monitoring

Permanent SENSOR DDS® monitoring systems provide continuous liner integrity surveillance throughout the service life of the project, with fast alarm response and precise leak location.

Cost and Risk Control

By locating defects early and accurately, SENSOR DDS® helps reduce repair scope, operational downtime, unnecessary excavation and potential costs related to environmental damage.

Frequently Asked Questions

Our proprietary SENSOR DDS® technologies, including patented monitoring and leak location solutions, are among the most sensitive systems on the market. They can precisely locate even microscopic leaks and openings smaller than 0.1 mm, allowing repairs to be carried out before major fluid leakage and subsoil contamination can occur.

Yes. The SENSOR DDS® Mobile system uses the Dipole Method, a proven Electrical Leak Location (ELL) technique designed for testing geomembrane and waterproofing liner integrity beneath protective cover layers such as soil, gravel, concrete or liquid. This eliminates the need for costly and risky excavation when locating the source of a leak.

The main difference lies in the Electrical Leak Location (ELL) method used and the stage of construction.

  • Exposed geomembrane liner testing – spark testing is performed immediately after installation, allowing even very small defects to be detected before the liner is covered.
  • Covered geomembrane liner testing – under gravel, soil or concrete – is carried out using the SENSOR DDS® Mobile system, which can precisely locate leaks even through a cover layer up to 2 m thick.

Mobile testing is used for one-time liner integrity verification, typically after geomembrane installation and before the liner is covered.

  • Permanent monitoring – LMS / Online uses a sensor network integrated directly into the structure to monitor geomembrane and waterproofing liner integrity 24/7 throughout the entire service life of the project. When damage occurs, the system immediately sends an alarm by SMS or e-mail, helping reduce environmental risks, downtime and remediation costs.
SENSOR DDS® systems are compatible with all common non-conductive waterproofing liners, including HDPE, PVC and TPO geomembranes, as well as bituminous membranes. With the conductive geotextile SENSOR AFISEN, we can also monitor double-liner waterproofing systems.

SENSOR can flexibly support projects of any scale – from smaller local assignments to some of the world’s largest and most technically demanding liner integrity projects.

Our experience includes projects for leading global operators, including major mining developments where the requirements for accuracy, reliability and waterproofing liner quality control are exceptionally high.

As one of the world’s largest specialist companies in waterproofing and geomembrane liner integrity testing, we have an extensive team of qualified experts. This allows us to deploy significant capacity in parallel and manage large-scale projects efficiently – helping deliver work on time, to the required quality standard and according to the specific needs of each client.

At the same time, we bring the same level of expertise, technology and quality control to smaller projects, where speed, efficiency and confidence in properly performed testing are just as important.

Regardless of project size, SENSOR delivers the same standard – precision, experience and global know-how without compromise.

Our technologies act as a first line of defence against ecosystem contamination.

  • Prevention of groundwater contamination: Early detection of microscopic cracks and defects helps prevent hazardous substances – such as landfill leachate or chemicals from mining tailings ponds – from escaping into soil and groundwater.
  • Reduced carbon footprint of repairs: Precise leak location means there is no need to uncover and move thousands of tonnes of soil or gravel when searching for the source of a leak. This significantly reduces emissions from heavy machinery.
  • Support for the circular economy: By monitoring landfill liner integrity, we help ensure that waste remains safely isolated from the surrounding environment for decades.
  • Protection of biodiversity: By reducing the risk of environmental incidents, SENSOR DDS® systems help protect surrounding habitats from irreversible damage caused by toxic substances.

Prevention is significantly less expensive than remediation. SENSOR DDS® systems help reduce costs in four key areas:

  • Minimised repair costs: Thanks to precise leak location – down to centimetre-level accuracy – there is no need to uncover the entire waterproofing area. Only the affected point needs to be repaired, saving excavation work, materials and time.
  • Protection against severe environmental penalties: Environmental incidents can lead to major sanctions from regulatory authorities. SENSOR DDS® provides evidence of liner integrity and enables action to be taken before a leak develops into a serious failure.
  • Potential reduction of insurance costs: Insurers may take the presence of an active monitoring system into account when assessing environmental risk and calculating insurance premiums.
  • Extended service life of the structure: Regular integrity monitoring helps prevent degradation of the subsoil and load-bearing structures, delaying the need for major reconstruction.
Criterion Without SENSOR With SENSOR DDS®
Leak detection Days to weeks - trial and error Immediate location - cm-level accuracy
Scope of work Large-scale uncovering of the liner Local repair at one exact point
Risk Penalties and operational shutdown Controlled condition under supervision
Costs Extremely high - remediation Significantly lower - standard maintenance

SENSOR is a global leader in waterproofing and geomembrane liner integrity control, with more than 35 years of tradition and unmatched experience in the field. We are one of the world’s largest specialist companies focused on leak detection in waterproofing systems.

With a network of 7 branches worldwide, we are able to support projects across continents – quickly, efficiently and without compromise. Our solutions are available wherever they are needed, regardless of the size or location of the project.

We rely on a team of highly qualified, certified and specially trained non-destructive testing experts who ensure maximum accuracy and reliability of results.

Our competitive advantage is also built on our in-house R&D department, where we continuously develop and refine SENSOR DDS® technology to push the limits of accuracy, efficiency and safety in waterproofing liner integrity control.

If you are looking for certainty, precision and a global partner without compromise, SENSOR is the clear choice.

Reliable Geomembrane Leak Detection for Critical Infrastructure

SENSOR DDS® technology enables precise detection and location of damage in geomembranes and waterproofing systems before serious environmental or operational risks arise. Our solutions are designed for demanding industrial projects where accuracy, safety and operational continuity are critical.
  • Fast ROI – liner defects can be detected before the system is covered
  • Reduced costs – avoid unnecessary repairs, excavation and layer removal
  • Immediate verification – clear confirmation of waterproofing liner condition after testing
+421 2 20 90 10 80
office@sensorgroup.com

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