WLM-SYSTEM Überblick/Kreislauf
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WLM-SYSTEM - Overview

The WLM-SYSTEM (Water-Loss-Management) is a sustainable solution to systematically force the recognition and reduction of water losses by open (virtual zones) and closed (DMA) network operation. An overlapping zoning of sectors by WLM - multiparameter sensors may result in avoidance of a very costly physical zoning.

The WLM-SYSTEM enables an immediate evaulation of the actual condition of the pipe network.


The WLM-Sensor integrates an inductive flow sensor (bi-directional), a piezo-ceramic pressure sensor, a highly sensitive piezo electric noise sensor and optional a temperature sensor in one single housing. The installation affords a precise positioning of the measuring head to the intersection of the laminar and turbulent flow.

WLM-SYSTEM - Application and Benefits

The parameters Flow Noise Pressure and Temperature are continuously measured. Typically, this measurement is performed during the calm night hours, i.e. between 3 and 4 am. Measurements are obtained, processed and stored for the later transmission to a central PC/SCADA (or online).

Every deviation found between the measured and previously stored values (for example increased flow, flow direction changes, decreased pressure and/or a higher noise, leak- or flow noise) is automatically registered and displayed with an alarm raised by the AQUALYS Software (and SMS).

WLM-SYSTEM - Main features

  • Network monitoring
  • Inductive flow-metering
  • Hot tapping
  • Active leakage control

  • Installation to any pipe dimension/material
  • Active leakage survey
  • Hot tapping under full pressure
  • Long term maintenance free
  • Keeping leakage level at a minimum
  • Analogue noise interface – hydrophone (connection to correlator)
  • Diagnosis of network condition
  • Step by step installation
  • Immediate leakage warning
  • Easy connection to any SCADA system
  • SMS-Warning
  • Optional temperature measurement
  • Highly cost effective “Sensor”-chamber installation
  • Theft- and flooding alarm
  • Water balance module (totalizer)
  • “ONLINE” leakage warning

WLM-SYSTEM - Connection box according to IP68 standard

  • O-Ring sealing - up to 5 bar - visible
  • Visible fuse
  • Modem LED visible
  • Internal or external antenna
  • 100% sealed plugs


The Software for the WLM-SYSTEM manages both the data transfer between the central PC and the WLM-Sensors, and enables a graphical and numerical display of these data. The user-friendly software provides the operator with information about the current leakage situation of the surveyed zone in the network. On an overall map the user verifies graphically if and where a leak appears. A more detailed screen of the failure (leakage zone) shows the numerical values and a time dependent diagram of Flow Noise Pressure and Temperature (optional).

WLM-SYSTEM - Main features of AQUALYS

  • Easy setup
  • Short and long time reports
  • Automatic offset adjusting of min/max levels
  • Compare measuring points just by one click
  • Automatic boundary setting
  • SMS info and warning
  • Remote setting of WLM-Sensors (i.e. measuring time)
  • Live data online and historical information
  • Automatic export option (connection to SCADA)
  • Totalizer for single meter or DMA including data form 3rd party (water balance)
  • Easy zoning option (DMA) or virtual zoning

Flow measurement

The WLM-Sensor is based on the electro magnetic method and is designed as insertion probe. A key feature of the flow sensor is the ability of measuring very low flow speeds (1 cm/s). This enables system to detect smallest leaks even when it starts leaking.

The WLM-Sensor can be used with the internal data logger or it can be directly connected to any SCADA system.

Interfaces: Modbus RTU TCP 4-20mA GPRS GSM Analog modem Ethernet Fibre

Pressure and level logging

  • Pressure and levelogger for different application
    from 0,4 bar (resovoirs, ground water level)
    to 30,0 bar (high pressure systems)
  • Battery powered
  • Up to 120m cable

Data logging/recording

m-log Data logger



  • Pressure logging
  • Impulse counter for flow measurement
  • Level metering
  • Termperature recording
  • Various sensors for 0-10V, 4-20mA, impulse, etc.


  • Memory up to 1.000.000 values
  • 10 years battery lifetime
  • Operation temperature -25°C to +60°C
  • Online data transmission
  • Online parameter setting
  • SMS alarm for 48 boundary values
  • Full compatibility to the WLM-SYSTEM
  • AQUALYS Software

Data transmission

  • GPRS
  • TCP
  • Ethernet
  • CSD
  • Direct / LWL
  • 4-20mA interface

Leak detection / Pin pointing


The new-generation lightweight LC-2500 brings a new dimension to leak detection. It's extremely portable and easy to set up and run. Input pipe materials, pipe diameters, and lengths between Red and Blue sensors by simply selecting them in the program menus. The automatic functions can do the rest. The Main processor Unit displays the correlation "picture" and the distances to the leak from the Red pre-amp transmitter and the Blue pre-amp transmitter.


With digital noise reduction that removes intermittent sounds like barking dogs and passing vehicles. DNR-18: the advanced digital CPU eliminates intermittent interfering noises, like passing vehicles, people talking, and pedestrian footsteps. Traditional band-pass filters filter continuous noises, such as A/C hum, idling motors, and wind.


This is the High Performance acoustic leak detector. It has been 10 years since the HG-10All went on sale and this has built a solid reputation due to useful hand-switch and light weight sensor. It allows accurate pinpointing of the actual leak. HG-10All professionals Water Leak Detector has optional 3 contact rod for Water leak surveying.


The PL-2000 offers a new approach in high power, low frequency location. With 3 active frequencies, 0.5kHz, 8kHz, and 27kHz and 2 passive frequencies, 50/60Hz, as a Live Cable detection mode and both inductive and direct connection capabilities, the PL-2000 is powerful and versatile. Can trace and locate any continuous metal such as iron, steel, and copper water lines, gas lines, tracer wire by plastic pipe, telephone/TV cables, copper and aluminum wire, conduit and power lines.


The FSB-8D is a small, compact electronic sound detector for finding water leaks. Especially, FSB-8D is well-suited to Water Leak Surveying on pipe of Plastic pipes like PVC and PE.




A short overview over the WLM-SYSTEM as flyer presented.

WLM-SYSTEM Presentation

Our WLM-SYSTEM as presentation with examples of realized projects.

WLM-SYSTEM Connection box

A closer look on the connection box setup.

About us

For more than 30 years MARTINEK GMBH Measurement Technologies is supporting water and electricity utilities and industry in area of water network monitoring, energy supply, HV testing equipment and moisture monitoring/analysis (wood industry).

Due to our activities in the area of active leakage service and management we have created our WLM-SYSTEM which supports water utilities in sustainable monitoring and leakage survey of pipe networks. The key tool is our WLM-Sensor that includes all leakage parameters in one single measurement unit Flow Noise Pressure. The system enables utilities to ease the way of understanding their network with the help of an integral measurement unit, data logger and PC software AQUALYS.

The WLM-SYSTEM is simple to install and easy to handle. It requires no expensive structural works like chambers and is maintenance-free. This system is currently the most modern equipment to detect leaks in defined zones and to analyse water pipe networks. Managed by Dieter Martinek, it is our objective to offer sophisticated solutions to survey and to analyse water pipe networks. The WLM-SYSTEM (Hard- and Software) is a keytool to sustainably protect and save one of our most important resources, i.e. drinking water.

DI (FH) Dieter Martinek
MARTINEK GMBH Measurement Technology


MARTINEK GMBH Measurement Technology
Burgweg 8, 6840 Götzis
Telephone: +43-720-210021
Mail: office@martinek.org


Water utility of Chemnitz/Germany (since 2006)
Chemnitz have a plan to cover the whole network with 4 parameter probes (flow, pressure, noise and temperature). They have connected the database of AQUALYS with their existing SCADA system (IDS) using it parallel. To read further we recommend you to read the reference writing.

Water utility of Hof/Germany (since 2006)
The WLM-SYSTEM is used via 4-20mA interface to connect it to the existing scada system. People from Hof have tested different types of flow sensors from different suppliers and are now using only the WLM-Sensors with the special chamber. The reason for their decision beside the good measurement results were the favourable and easy installation of the sensors.

Water utilty of Tallinn-Tallina Vesi/Estonia (Seit 2003)
Tallinn waterworks was one of our first customers. And is still expanding the coverage of the monitoring in their pipe system. Best is to read the letter of reference from their network manager.

...and lots of other satisfied customers!

Picture gallery


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We are looking for Distributors. Maybe in your area. Please contact us here for further information.


MARTINEK GMBH Measurement Technology
DI(FH) Dieter Martinek (Geschäftsführer)
Burgweg 8
6840 Götzis
VAT-ID-No.: AT U45025208
Firmenbuch-Nr.: FN 141650i
ARA-Lizenz-Nr.: 7435

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