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ALD-Acoustic Leak Detector Inspection technique: TOWFISH

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ALD-Acoustic Leak Detector Inspection technique: TOWFISH

In this configuration the ALD® subsea sensor in enclosed in an hydrodynamic body (“fish”) designed to be towed by a vessel. Data are taken on board trough an electromechanical cable. This technique reduce drastically the cost of inspection because of the high daily productivity and of the limited requirements for the support vessel (no DP required) but is only applicable in shallow water.

Features

The system is mainly composed by:

• subsea sensor including an acoustic transducer, a depth gauge and an electronic data processing unit

• transmission and towing  line to take the data on the vessel

• receiver for hardware processing

• PC based software to analyse and display the results

The ALD® towed fish includes a custom made acoustic sensor, the pre-processing electronics, an hydrodynamic body and a depth gauge.

Technical specifications

TOWFISH SENSOR

  • length: 1110mm
  • diameter: 108 mm
  • weight in air: 12 kg
  • weight in sea water: 10 kg
  • tow cable length: 250 m
  • frequency range from 1 to150 kHz  
  • acoustic sensitivity -165dB re 1V/uPa
  • max operative depth 80m
  • survival  depth 200 m

Accessories and optional configurations

In this configuration the following optional sensor can be installed: dye detector, crude oil detector.

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ALD – TOWFISH INSPECTION MODE Download

Product sheet – ALD TOWFISH INSPECTION MODE

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