We support our customers worldwide in minimising gas and water leaks, locating pipes and lines, and optimising biogas plants. Sewerin solutions combine over 100 years of experience with innovative technologies, enabling modern resource management. Together with our customers, we protect people from explosion risks and the environment from unnecessary emissions and water loss. As a medium-sized company with 300 employees, we are internationally successful.


Noise logger
The SePem 150 is a mobile noise logger that remains in the pipe network for several days or months. The noise data recorded by the noise logger can be conveniently read out wirelessly as you drive by. This allows you to efficiently monitor critical network areas over a longer period of time without having to move devices on a daily basis. The SePem 150 measures relative level changes, features external antenna and a rugged design (IP68), providing maximum reliability with minimum effort.
The SePem 150 is intended for use by water suppliers, network operators and service providers interested in monitoring their drinking water networks on the move. Thanks to the drive-by principle, network sections can be monitored over weeks or months without having to pick up the logger every day. This significantly reduces the workload and enables proactive leak detection. This method is particularly efficient in small and medium-sized networks and ensures systematic control. Users benefit from the clear evaluation of relative level changes, which provide clear indications of leaks.

Ground Microphone and Water Combination Device
The AQUAPHON® A 150 is the compact solution for acoustic water leak detection in supply networks. With its lightweight design, automatically rotating display and long rechargeable battery life, it enables convenient and reliable leak detection – even over long periods of use. High-quality Piezo microphones ensure that leakage noises are precisely detected and analysed. Thanks to its user-friendliness, the device is ideal for both experienced and occasional users.
The AQUAPHON® A 150 is ideal for prelocating and accurately pinpointing water leaks in pipe networks. Typical users are municipal utility companies, network operators and specialized service providers who depend on reliable technology to reduce water losses quickly and efficiently. Thanks to its low weight and long rechargeable battery life, it is also ideal for long periods of work. In combination with the right microphones, it covers a wide range of applications – from pre-locating on fittings to locating on paved/unpaved surfaces. The AQUAPHON® A 150 thus makes a significant contribution to reducing water losses, ensuring network quality and complying with legal requirements.

Ground Microphone
The Stethophon 04 is the compact receiver for indoor water leak detection. With its undistorted sound reproduction, digital minimum level display and customisable filter function, it enables precise and reliable prelocation. Whether you use wired or wireless headphones – the device offers maximum flexibility and convenience in everyday use. It allows you to find leaks in house service connections quickly and reliably.
The Stethophon® 04 is impressive in a wide range of scenarios: from leak detection in heating and sanitary installations to the inspection of house service connections and locating compressed air systems. It is also ideal for checking bearings on machines. Utility companies benefit from the high measuring accuracy and user-friendly handling, especially during routine inspections or in incident management. Thanks to optional accessories including wireless headphones or resonance plates, the device can be expanded and optimally adapted to your requirements.

Ground Microphone
The AquaTest T10 is your reliable companion for quickly prelocating leaks in the water supply network. Thanks to high-quality microphone technology and perfectly tuned electronics, the device has impressively high sound quality. The AquaTest T10 fits perfectly in the hand due to its ergonomic design, enabling fatigue-free working. Both the receiver and test rod are combined in one device so that you are ready to go immediately – either with wired or, as an option, wireless headphones.
The AquaTest T10 is ideal for water suppliers, municipal utilities and specialised service providers who need to efficiently locate leaks in the water pipe network. Typical areas of application include prelocating burst pipes, testing fittings and systematic network monitoring. With its high-quality noise visualisation and optional wireless headphones, the AquaTest T10 makes the everyday life of technicians in the field much easier. Integrated filter stages and robust accessories solve problems like unclear leakage noises and difficult operating environments with ease.

Ground Microphone, Correlator, and Water Combination Device
The SeCorrPhon AC 200 combines a test rod, ground microphone and correlator in a single device – a complete solution for professional users in water leak detection. With its high-quality Piezo microphones and optimized frequency response, it reliably locates even the smallest leakage noises. An integrated audio player enables the direct comparison of leak noises on site. Intelligent filters and convenient operation ensure fast, reliable and precise leak detection in any situation.
The SeCorrPhon AC 200 is the ideal solution for municipal utilities, municipal enterprises and service companies that value a complete system. Typical applications range from rapidly prelocating suspicious leaks to precisely locating and exactly correlating. The system provides clarity, especially in the case of complex pipe networks with different materials and diameters. Thanks to integrated sound velocity measurement and GNSS documentation, work becomes more efficient. Suppliers benefit from reduced water losses, shorter response times and sustainable maintenance of the network infrastructure.

Ground Microphone
You can use the W50 listening stick to localise leaks in pipe systems to one pipe section. To do this, attach the listening stick before use. You can customise the length of the listening stick using the extensions supplied.

Correlator
The SeCorr® C 200 is a powerful correlator that enables quick and precise leak locating in underground pipelines. Thanks to state-of-the-art filter technology, it delivers clear measurement results and reliably suppresses sound interference. The device calculates the exact position of the leak by combining the run time difference, pipe length, pipe material and pipe diameter. With its rugged design and intuitive user guide, the SeCorr® C 200 is the ideal solution for utilities that require excavation-ready results.
Whether in urban drinking water networks or rural service areas – the SeCorr® C 200 efficiently detects leaks before damage or water losses escalate. It supports network operators in reducing non-revenue water while simultaneously protecting the infrastructure from damage. It shows off its strengths particularly well in complex pipeline networks with different pipe materials. Maintenance companies, municipalities and energy suppliers benefit from a reliable solution that delivers precise results and avoids unnecessary excavations.

Tracer gas
Use the VARIOTEC® 460 Tracergas to find even the smallest leaks quickly and reliably thanks to the use of hydrogen-containing tracer gas. The highly sensitive device detects even minimal quantities of leakage and displays the measurement values in real time – from large-scale prelocation to the exact point of the leak. The simple operation and digital documentation provide you with practical support when tracking and reporting. This saves you valuable time and increases safety throughout the entire inspection process.
The VARIOTEC® 460 Tracergas offers you a tried and tested method for pinpointing even the smallest leaks. By the smallest leaks, we mean damage to water pipelines where the sound of escaping water cannot be measured using acoustic locating methods. This can be the case, for example, with hairline cracks where the outflow volume is too low or if there are no possible measuring points for sound sensors, or they are too far away. Typical areas of application are water networks. Specialised personnel from utility companies benefit particularly from this method. The tracer gas can also reliably locate leaks through asphalt, concrete or other surface sealants and is non-flammable.


Gas combination device
With the VARIOTEC® 480 EX, you can cover all essential detection, warning and measurement tasks with just one device. With the optional ethane analysis, you can also recognise immediately and reliably whether a gas leak is natural gas or sump gas. The intuitive operation with illuminated display also allows you to work in a relaxed manner, even under the most difficult conditions.
The VARIOTEC® 480 EX is your solution for all tasks in gas network operation. Whether for maintenance or servicing, it is ideal for detecting, warning and measuring gas concentrations. This makes the device the ideal solution for gas supply specialists who require precise and reliable gas measurement. It is particularly suitable for safe leak detection and gas concentration measurement, even in EX zones in accordance with ATEX directives. The robust design and simple operation make the VARIOTEC® 480 EX the ideal companion for all applications.

Gas detection device
The LaserGasPatroller LGP 800 is a vehicle and laser-based detection solution that reliably detects gas leaks and gas indications in underground gas pipelines. Air samples are drawn in, analysed and documented while driving along the pipeline route, allowing for quick and efficient detection of methane emissions. The SeCuRi® SAT software links precise measurement values to sections of pipe and records them automatically. It then automatically generates the LDAR report that you need to fulfil the requirements of the European Methane Regulation. Thanks to its modular design and low energy requirements, the system can be integrated into a wide variety of vehicles and ensures maximum efficiency when inspecting pipe networks.
The LaserGasPatroller LGP 800 is suitable for the regular inspection of underground gas pipelines by utility companies, network operators, municipal utilities and specialised service providers in the gas industry. As a user, you benefit from the fast, seamless detection of the gas indication, the automatic documentation and the time-saving export function for reports. With the LGP 800, you drive directly over the pipeline route in accordance with DVGW regulation G 465-4-3 and inspect the area directly above the route. If you also use the optional wind gauge, you can also check the pipe at a distance of up to 5 m if it is on the side facing the wind.

Gas detection device
The SR-LD 200 is a mobile gas detection device that allows you to detect methane leaks quickly and accurately, even from a great distance - particularly valuable when inspecting places that are difficult to access. The powerful TDLAS laser technology makes it possible for you to reliably check gas pipes and system components from a distance of up to 120 metres – even over fences and busy roads. With the SR-LD 200 you can measure distance and gas concentration in one step – automatically checks for plausibility and corrects. This makes the SR-LD 200 extremely precise. This, along with its high sensitivity and long battery life, makes the SR-LD 200 the ideal companion for working in challenging situations when inspecting exposed gas pipelines.
The SR-LD 200 is particularly suitable for gas suppliers and operators of biogas plants. Typical applications include checking exposed gas pipelines, house connections, tanks and pipes under bridges or busy roads. You can also conveniently check plant components from a safe distance without having to enter private property or hazardous areas. This increases your work safety and saves time during routine and emergency service operations.

Gas combination device: Gas detection and gas measurement
The EX-TEC® HS 660 helps you master demanding tasks in gas supply. The combination of gas detector and gas measuring device makes it possible for you to identify gas leaks and measure concentrations. The optional ethane analysis also allows you to clearly determine the origin of a gas discovery. Its robust design, clear display and modular sensor configuration equip you perfectly for routine tests and challenging gas identification.
The EX-TEC® HS 660 fulfils the highest requirements for safety and versatility. Whether the task is precisely detecting leaks, carrying out measurements in complex gas networks or use in explosion-proof conditions – the EX-TEC® HS 660 combines precision with a robust design. Its comprehensive measuring functions make it ideal for professional use in gas supply and industry. It is ATEX-certified and has an IP54 protection rating to ensure reliable results even under the harshest conditions.

Flame ionisation detector
The portable flame ionisation detector PORTAFID® M3-K is your solution for the professional inspection of underground gas pipes for gas leaks. Thanks to flame ionisation detector (FID) technology, the PORTAFID® M3-K enables highly sensitive and reliable methane measurement, even under demanding conditions. The PORTAFID® M3-K delivers precise measurement results without interference by moisture or other gases. The handy design and flexible accessories guarantee you maximum flexibility and safety in your daily work.
The PORTAFID® M3-K is the ideal solution for regular pipe network inspections of underground gas pipes. Utility companies and monitoring services can efficiently check gas service connections, main lines or complex pipe networks and detect gas leaks quickly and accurately. Robust handling and quick availability mean that challenges typical to the industry such as changing weather conditions, large areas and the need for precise, reliable measurement results are easily mastered. The PORTAFID® M3-K is a safe, mobile and user-friendly overall solution.

Flexible gas leak detector
The EX-TEC® SNOOPER 4 is your reliable, portable gas leak detector for the fast and targeted detection of various gases. Whether it’s methane, propane or even kerosene (JFUEL), undetected gas leaks can have serious consequences in everyday work. With the compact gas leak detector, you can find even the smallest leaks to prevent damage at an early stage. The integrated gas database of the EX-TEC® SNOOPER 4 allows you to reliably detect up to seven different gases.
The EX-TEC® SNOOPER 4 is the ideal solution for indoor gas installations and is suitable for the fast and precise detection of gas leaks in pipelines, fittings and at connection points. Ideal for use by installers, maintenance services, building technicians or even specialised personnel in energy supply. Thanks to the compact design and optional accessories, you can also reach places that are difficult to access, detect gas leaks at an early stage and avoid hazards.

Portable gas concentration measuring device
Undetected gas leaks with toxic and explosive gases are an everyday hazard for gas fitters, maintenance staff and other specialised personnel – with serious consequences. The EX-TEC® PM 580 is a portable, explosion-proof gas concentration measuring device that allows you to reliably detect various gases. You receive a clear warning of toxic and explosive gases and can measure several gases precisely. The EX-TEC® PM 580 allows you to work as efficiently and safely as possible.
The EX-TEC® PM 580 is used wherever gas lines need to be tested, gas leaks pinpointed and hazards from toxic or explosive gases detected. It is ideal for gas fitters, maintenance staff and specialised personnel in building services, utilities and industry. The EX-TEC® PM 580 can be used to reliably locate leaks in freely accessible gas lines, assess the risk of explosion and determine whether toxic gases are within the occupational exposure limits. In the structure application, the device displays the carbon monoxide concentration in the room air and triggers an acoustic and visual alarm if the values are too high.

Compact gas detector
The SNOOPER mini is a compact and robust gas leak detector for rapid leak detection on exposed gas pipelines in buildings. The device starts quickly and reliably detects methane, propane or hydrogen leaks. The minimal interference with respect to other gases and moisture also ensures low susceptibility to failure. This makes the SNOOPER mini your ideal companion for inspecting exposed gas pipelines.
The SNOOPER mini is ideal for gas fitters, public utilities and service technicians who test exposed gas pipelines in buildings. The flexible sensor systems can be used for both routine inspections and targeted leak detection in freely accessible areas. The SNOOPER mini is also suitable for carrying out leak tests on pipes, valves and other industrial products using the tracer gas method. The SNOOPER mini is even a reliable solution for servicing LPG or natural gas vehicles.

Reliable shaft ventilation
FLIS-EX ensures fresh, safe air in wells and shafts. The powerful extraction fan protects you from dangerous CO2 accumulations when accessing the shaft, ensuring your safety. With high engine power, explosion protection and versatile application, the FLIS-EX guarantees the efficient supply of fresh air and protects against hazardous gases. The robust device combines flexibility and user-friendly handling for maximum efficiency in everyday work.
The FLIS-EX is ideal for working in confined, poorly ventilated spaces as well as wells and shafts. In such spaces the device ensures that the air is fresh and clean by extracting dangerous CO2 accumulations. The FLIS-EX is thus ideal for water and gas suppliers, municipal utilities, industrial companies, building and maintenance teams. Fast, simple air extraction protects against loss of consciousness and health risks and enables safe, standardised working conditions even in challenging environmental conditions such as temperature, humidity and pressure. Thanks to the flexible hose and connection length it can be used even in spacious or hard-to-reach shafts – a real advantage when changing locations and facing daily challenges.

Compact multi-gas warning device
The Multitec® 520 equips you perfectly for testing work areas for flammable and toxic gases. The multi-gas warning device recognises up to six different gases at the same time, is particularly intuitive to operate and impresses with quick measurement results at a glance. Thanks to its rugged design and modern sensor technology, the Multitec® 520 is your ideal companion for everyday safety in confined spaces, shafts and industrial plants.
The Multitec® 520 is ideal for working in shafts, where the preventive measurement of hazardous gases is vital for survival. Before entering, the floating probe is used to take measurements at the bottom of the shaft and determine whether it is safe to work in the shaft. This puts you on the safe side for every application. You can reliably measure methane, carbon dioxide, oxygen, carbon monoxide, hydrogen sulphide and ammonia with just one device and can react immediately if limit values are exceeded. Simple handling and flexible sensor configuration allow you to fully concentrate on your work.

compact flaring device
The DN 25 gas flare is the compact solution for safely and in compliance with regulations flaring small to medium amounts of residual gas from low- and medium-pressure gas lines. With a certified backflow safety device, optional Venturi nozzle, and thoughtfully designed accessory package, you can work reliably, flexibly, and meet all current environmental and safety regulations, such as the EU Methane Emissions Regulation.
The DN 25 gas flare is used wherever gas supply lines in the low or medium pressure range need to be safely vented – for example during decommissioning, refurbishment, or filling. The compact design, the reliable piezo burner, and the optionally selectable equipment variants also make it easy to use in confined spaces. The flaring device helps to reduce emissions in an environmentally friendly manner and increases your process and work safety in everyday operations.

With the ATS 503 and ATS 501 test devices, you can carry out functional tests and adjustments of the EX-TEC® PM 580, 550, 500 and 400 gas concentration measuring devices reliably and extremely efficiently
The ATS testing device can be operated in three operating modes:
In addition:
The ATS 503|501 test station is used by utility companies and other users of the EX-TEC® PM 580, 550, 500 and 400 gas concentration measuring devices. It automates functional testing and adjustment. In this way, it makes everyday life easier for device maintenance staff in particular, but also for all other users.

Testing technology plays an important role in operational safety. DVGW Code of Practice G 465-4 describes the required tests for the various appliance classes.
We take this into account with the Sewerin test equipment. All testing devices have a pressure gauge for displaying the can pressure and an improved can connection with simplified handling. With the extensive range of accessories, such as test gas cans, there is a wide spectrum of applications.


Portable multi-gas warning device
With the Multitec® 540 you can measure and analyse gas mixtures from biological processes. The integrated infrared sensors and the optional electrochemical sensors allow you to measure up to five gases simultaneously and analyse the concentrations. All values can be shown at the same time on the large display so that you can see everything at a glance.
The Multitec® 540 is the mobile solution for operators of biogas plants, sewage treatment plants and landfills, who need to accurately record and document gas compositions. Typical applications include raw and pure gas measurements for quality control, the monitoring of fermenters, secondary fermenters and repositories as well as checking the film interspace of gas membranes in accordance with common practical requirements. The simultaneous measurement and analysis of up to five gases gives you the opportunity to optimise processes and efficiency and ensures your safety.

Precise gas monitoring
The BioControl 2 allows you to reliably monitor the gas composition at up to two measurement locations in your biogas plant. The system provides precise data for methane, carbon dioxide and optional additional gas measurements. Thanks to the automatic recording and storage of all values, you can keep an eye on your process parameters at all times. The compact design is ideal for operators who prioritise efficiency, safety and ease of integration.
The BioControl 2 is perfect for smaller biogas plants or specific process sections for which precise measurement is crucial. Typical applications are the measurement of raw gas and pure gas at the filter and monitoring individual fermenters or gas purification stages. As an operator, you benefit from exact values for process optimisation, increased operational safety and complete documentation in accordance with TRAS 120.


SEWERIN's fibre optic probe systems enable the precise location of non-metallic pipes - even under demanding conditions. The copper strand integrated into the fibre optic rod allows the exact route of the pipe to be determined using the UT 9200/9100/930 and UtiliTrac locating systems. Supplemented by different locating transmitters, the end points of the fibre optic probes can be detected with pinpoint accuracy at depths of up to 18 m. Whether locating gas, water or waste water pipes - the fibre optic probe systems deliver reliable results and ensure maximum safety in network operation.
The fibre optic probe systems are used wherever non-metallic pipes need to be located. In the water supply sector, they can also be used to locate house connection pipes that are in operation via a sluice. In the gas supply sector, they are ideal for locating disused pipes. In the wastewater network, they help to reliably determine the course of sewers, empty pipes or drainage pipes. They therefore support utility companies, network operators and specialised locating service providers in the precise documentation of pipeline networks, avoid incorrect excavations and improve the efficiency of maintenance.

The AQUAPHON® AF 50 | FERROPHON® FG 50 system is the ideal solution for plumbers and building technicians who need to reliably locate leaks and pipes indoors. With state-of-the-art microphone technology, it offers excellent sound quality for water leak detection and combines this with powerful pipe detection using the FG 50 generator. Thanks to its low weight, ergonomic design and long battery life, you can work without fatigue even in demanding applications. Automatic component recognition, intuitive operation and a clear display round off the powerful package.
The system is ideal for locating water leaks in buildings, from house connections and risers to fittings. With the AF 50 receiver, you can precisely localise leaks and pipes using acoustic signals. The FG 50 generator provides reliable support for locating metal pipes, even under plaster. Installers, building technicians and service companies benefit from the flexible application and high precision, which reduces unnecessary demolition work. Typical challenges such as pipes that are difficult to access or concealed leaks can be solved efficiently - for satisfied customers and cost-effective processes.

The COMBIPHON® CG 150 generator has been specially developed to acoustically locate plastic pipes. Strikers and stoppers cause the pipes to vibrate and that vibration is then picked up by a ground microphone. Thanks to radio control, you can operate the signal strength of the striker and the pause function of the generator from a distance. This saves time and increases efficiency. The CG 150 complements the AQUAPHON® or AquaTest T10 system receivers perfectly.
The CG 150 is used in water supply systems when plastic pipes that cannot be detected using electromagnetic methods need to be located. It can also be used to reliably pinpoint fibre cement pipes. Typical users are network operators, waterworks and service companies that need to identify leaks or pipe routes quickly and accurately. It is easy to integrate into existing AQUAPHON® systems, making it particularly interesting for companies that already use acoustic leak detection technology.

The FERROPHON® FG 150 C combines the best features of the FERROPHON® FG 150 and COMBIPHON® CG 150 generators: the high performance of the FG 150 and the CG 150’s added function of acoustically locating plastic pipes. This allows for precise pinpointing of not only metallic but also plastic pipes. Thanks to the radio control, the signal strength of the striker and the pause function of the generator can be conveniently controlled from a distance – a crucial advantage in practical use.
The FG 150 C is preferred in gas and water supply applications in which both metallic and non-metallic pipes need to be located quickly and reliably. It is particularly helpful in mixed supply networks, where conventional methods reach their limits. The combination of electromagnetic and acoustic locating offers maximum flexibility, whether for network modernization, maintenance or repair work.

The M130 pipe locator offers high-precision detection of hidden utility components – even on metal surfaces, in damp conditions or when temperatures fluctuate. Its one-button operation allows for intuitive handling without constant readjustment. Its robust ABS housing and directional search field guarantee reliable results in demanding environments. With over 30 hours of operating time (intermittent) and light/sound signals, it is an efficient companion for professionals in leak and object detection. Ideal for utility companies that demand precision and efficiency.
The M130 cap locator is widely used in water supply systems to reliably locate street caps, key poles (even without caps) and underground hydrants. It also proves its worth in gas supply systems when searching for covered condensate collectors or blow-out devices at pipe ends. In the waste water network, it makes it easier to locate manhole covers or rainwater inlets, even in winter conditions. Industry professionals particularly appreciate its ability to work precisely under metal surfaces, in damp conditions or with temperature changes. It solves challenges such as false alarms caused by surface metals or fatigue during prolonged use - and thus supports utility companies with efficient, safe pipe and object searches.

The UtiliTrac sets standards in the location of underground cables. With its well-balanced design, innovative antenna technology and intuitive one-button operation, it enables convenient, precise and fatigue-free pipe location. The three-dimensional display with automatic depth display offers you a real "view into the ground" and makes locating easier than ever. Thanks to the foldable receiver, integrated transport case with 10 W G 100 generator and a total weight of less than 7 kg, the UtiliTrac is quickly ready for use anywhere.
The UtiliTrac is the ideal solution for energy and water suppliers, construction companies, civil engineering and renovation firms as well as municipal companies. It demonstrates its strengths wherever underground cables need to be reliably located. Typical applications include locating electricity and telecommunication cables, water and gas pipes as well as tracking locating probes. Thanks to its powerful antenna technology and variable frequency settings, the UtiliTrac is particularly suitable for delivering precise results even in complex networks and with parallel cable runs. This allows you to reduce search times, avoid excavation errors and increase the efficiency of your work processes.

The FerroTec FT 10 is a compact magnetometer used to quickly and reliably locate ferromagnetic objects – even under difficult conditions and at great depths. Thanks to the six-stage sensitivity amplification, the device adapts perfectly to the respective environment and enables highly accurate results up to a depth of 15 metres (depending on the mass of the object). It is convenient to operate and has a rugged design, offering utility companies, network operators and building companies an efficient solution for object searches. Even non-ferromagnetic materials do not distort the measurement – for maximum reliability in daily use.
The FerroTec FT 10 is the ideal solution for anyone who needs to locate ferromagnetic objects in the ground or under coverings quickly and reliably. Typical applications include locating fittings or concealed or covered valve caps and for orientation during construction and maintenance work in the supply network. Energy and water suppliers, civil engineering companies and network operators benefit from the device’s extreme accuracy as damage to cables and infrastructure can be avoided. The FerroTec FT 10 delivers reliable measurement results even under difficult ambient conditions. Not only does this support efficient operational planning, but it helps sustainably safeguard supply networks.

The UT 930 system is the compact entry-level solution for reliable pipeline location. It consists of the UT 930 R receiver and the 5-watt UT 935 TX generator. With 7 frequencies, automatic gain control (auto-gain) and reliable depth measurement, it provides the key functions for rapid deployment. Thanks to its ergonomic design and intuitive operation, the UT 930 system is ideal for all standard locating tasks.
The UT 930 system offers a cost-effective and reliable solution for companies that need to locate pipes on a regular basis. It provides reliable support, particularly for standard tasks such as locating metallic gas and water pipes or cables in the ground. Construction companies use it to reduce the risk of excavation errors, while utility companies benefit from the rapid operational readiness for routine work.