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LEAK DETECTION

LEAK DETECTION

Systematic review of pipe networks and selective leak detection

Long-term studies show that burst pipes remain undetected in the ground an average of 100 days.

We have to deal carefully with fresh water and a regular inspection of the pipeline system is essential. Geodynamic changes in the soil can cause various types of water losses. A significant increase of consumption is not always the result, even small losses add up.

The one-time inspection of a pipe network may indeed reduce the water losses in the short term, but as burst pipes and other leaks occur in the pipe network constantly, a long-term reduction of water losses is only to achieve in conjunction with ongoing monitoring. WCS – Water Control Systems® allow a permanent monitoring of water pipeline systems and prevent expensive water losses.

WCS WATER CONTROL SYSTEMS®

WCS – Water Control Systems® is a modular remote monitoring system for water supply systems, sewage, wastewater treatment plants, district heating plants and the environmental industry.
Recording dynamical values and static state inquiries it is suitable for permanent monitoring in order to avoid expensive water losses.

PRINCIPLE

In general sound is used for the detection of leaks in water pipe networks. A damaged area creates pressure waves that are carried away in the water column. The waves propagate sinusoidally from the water column. Wherever the waves hit the pipe material, this is caused to vibrate. The further the pressure waves continue, the weaker they become. There is a point, where the waves in the water column no longer set the pipe material into oscillation.

At this point, no structure-borne noise will be heard anymore. Of course the type of soil, its compaction, the pipe material, operating pressure, pipe diameter and a few other factors may influence the result.

METHODS

A basic distinction may be made between zone measurement, pre-location and pinpointing. Depending on local needs and conditions the optimal appropriate method of measurement will be chosen.

NIGHT MINIMUM SUPPLY

Permanent pipeline systems monitoring for early detection of water losses

WATER LOSS ANALYSIS

Method for quantitative determination of water losses

CORELLATION MEASUREMENT

Acoustic leak positioning

ACOUSTIC ZONE CONTROL

By means of noise logger incl. radio evaluation, suitable for leakage position narrowing, for permanent net monitoring as well as for single examinations

GEOPHON LISTENING

Acoustic method for localisation and pinpointing

H2 TRACER GAS

Localisation method for smallest leaks, drip losses Suitable for plastic pipes

LEAK DETECTION DEVICES

ACOUSTIC ZONE MONITORING

  • Speedy locating process from a mobile unit
  • Indication of results of last 30 days
  • GSM – Interface
  • Adjustable sensitivity (plastic pipes)
  • High operating efficiency – battery lifetime of about 10 years

TEST ROD AQUA  M50 D

Aqua M-50D is used for pre-locating leakages in water supply systems. The noise analyser is so sensitive that even the smallest leakages can be detected. Due to its integrated level display the intensity of the leakage noise can be determined objectively.

Aqua M-50D is suitable for tapping valve rods as well as for controlling water clocks.

  • Radio transmission to headphones
  • Supersensitive piezoceramic microphone

AQUA M100 D

  • Maximum leakage noise amplification
  • Low device noise
  • Automatic measurements storage
  • Operation time >12 hours (quick charge NiHd)
  • Automatic display lighting
  • Headphones overshoot limiter
  • Minimum-/ average-/ maximum noise value display
  • Battery- / charge level indicator
  • Test rod measurement
  • Aluminium case
  • Wind protected ground pick-up
  • Test rod with extension
  • 6 frequencies

AQUA M300 D

The intelligent geophone for leakage detection

  • Daylight suitable display
  • LED-background lighting
  • Touchscreen
  • Pyramid modus
  • 256 Analog / digital filters
  • Automatic function for filter und amplification
  • Long-term measurements
  • Tracer gas leakage search

GAS CHECK H2

H2-Method for searching mini leaks

With the Gas-Check-H2 even tiny little leakages can be pinpointed. Hydrogen diffuses through almost any material due to its molecular size. The pipeline section to be checked is filled entirely with gas, and the pressure is increased slowly until the measurement varies according to the size of the leakage, the kind of soil, and the surface structure. The leakage on the pipeline will be below the the spot showing the highest concentration of gas. Usually the location indicated by gasCheck does not deviate by more than a few centimetres from the actual leakage location.

  • High quality hydrogen sensors
  • No noticeable interferences

FFT CORRELATOR LOKAL 100/5

  • Portable
  • Powerful also for plastics pipes
  • Automatic leakage identification / detection
  • Integrated background noise reduction
  • User friendly operation
  • Computer aided evaluation
  • Coherence function: exact indication of the leakage frequency
  • Dissipation function: detection of silent leakages
  • Elimination of background noises
  • Digital post-filtering

MULTI FUNCTIONAL CORRELATOR LOKAL 300

GEOPHONE

  • Automatic storage of measurements
  • 6 frequencies
  • Receiver for gas water pipeline search
  • Headphones overshoot limiter

CORRELATOR

  • Automatic leakage detection
  • Powerful on all materials
  • Integrated pipe data table
  • User friendly operation

AQUA M70 D

  • Maximum leakage noise amplification
  • Low device noise
  • Automatic measurements storage
  • Operation time >12 hours (quick charge NiHd)
  • Automatic display lighting
  • Headphones overshoot limiter
  • Minimum-/ average-/ maximum noise value display
  • Battery- / charge level indicator
  • Test rod measurement
  • Aluminium case
  • Universal sensor for geophone and test rod
  • 2 frequencies

AQUA M200 D

  • Maximum leakage noise amplification
  • Low device noise
  • Automatic measurements storage
  • Operation time >12 hours (quick charge NiHd)
  • Automatic display lighting
  • Headphones overshoot limiter
  • Minimum-/ average-/ maximum noise value display
  • Battery- / charge level indicator
  • Test rod measurement
  • Aluminium case
  • Wind protected ground pick-up
  • Test rod with extension
  • 6 frequencies
  • Auto gain control
  • Large display