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Sewerin FG 155 C Combiphon/Generator Acoustic Non-Metallic Pipe Locator for PVC, Poly, or AC Pipe


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Please contact us to Purchase,
or for a Quotation, or Demonstration.

  • $5,529.00

Sewerin FG 155 C Combiphon with 10 W Generator/Transmitter
For Acoustic location of plastic pipes and Metallic Pipes

Plastic pipes cannot be located by conventional electromagnetic means because they are not electroconductive. A different principle is applied when locating pipes using the acoustic method: The pipes transmit mechanical vibrations better than the earth that surrounds them. When the pipe is caused to vibrate appropriately, these vibrations spread along the pipe to the earth's surface where they can be picked up by a ground microphone. In the same way as water leaks are detected by acoustic means, the pipeline is located where the intensity is greatest. This method can also be used to locate fiber cement (AC/Transite) pipes and metal pipes.

FERROPHON® – FG 155 C generator

Suitable for universal use

The FG 155 C generator can be used to locate pipes using electromagnetic and acoustic methods.

It can be used to directly or indirectly energize electro-conductive pipes. With an output of up to 50 W, it is ideal for extreme locating ranges. Thanks to the strong performance parameters, the FG 155 C generator perfectly complements all receivers from the UT 9200/9100/930, FERROPHON® and UtiliTrac systems.

To locate plastic pipes acoustically, the generator controls an oscillator in the COMBIPHON® system or optionally the tapper or stopper. Pipes that are made to vibrate by the Striker or Stopper can then be located with the help of a receiver and ground microphone. For this task combining the AQUAPHON® A 200 receiver, TS 200 carrying rod und BM 200 or BM 230 ground microphone is recommended.The benefits of the FERROPHON® FG 155 C

  • direct or indirect energizing of electrically inductive pipes
  • acoustic localization of plastic pipes using Strikers/Stoppers
  • powerful generator with up to 50 W output power
  • ten preset frequencies (512 Hz – 116 kHz)
  • five individual frequencies adjustable (200 Hz  - 116 kHz)
  • remote controllable
  • suitable for the receivers of the systems AQUAPHON®, FERROPHON®, UtiliTrac and UT 9200/9100/930

The COMBIPHON® system consists of the Generator G5 central control unit and various impulse generators, so it can be used anywhere. Stoppers or Knockers are used to generate noises on the line which can then be acoustically detected by the AQUAPHON® or AquaTest T10 acoustic detection systems.

Literature Link 

Video of the principals of both the Knocker and Stopper noise generators:

COMPLETE Kit with Generator, Knocker for service Lines and Stopper for water mains. Kits are also available with only the Stopper for water mains, or only the Knocker for 2" and smaller pipes and tubing.

Contact us for current pricing, lead time, and delivery information.

Suggested Acoustic Locators:

  • Aquatest T-10 (Basic wireless acoustic leak detector)
  • Aquaphon A200 (Advanced acoustic locator with special pipe locating app)
  • Aquaphon AC200 (Advanced acoustic locator with special pipe locating app, Plus a Leak Noise Correlator)

This item ships ONLY to Ohio and Michigan. For other states visit for the local distributor or we can refer you to your local distributor.


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