The Fish Guiding Systems are used to block / deflect fish movements at the entrance to water intakes and are harmless to fish. The FGS uses underwater sound projectors powered by audio amplifiers and electronic signal generators, to create a repellent acoustic field ahead of a water intake. We can supply different models of FGS  to suit different site conditions. The FGS is analogous to a public address or domestic hi-fi system. The signal is recorded onto an EPROM-chip and the signal generator may contain a number of these which can be manually selected or played at random or in rotation. One or more high-powered audio amplifiers that are matched and filtered to suit the sound projectors amplify the signal.Power requirements are usually around 1kVA per amplifier and sound projector. Each sound projector will handle up to 450 W of signal power

FGS Mk II 15-100 Sound Projector
Underwater sound projectors are used to create the underwater sound field. Generally, a linear array of sound projectors is used to create a field of repulsion. We refer to this array as the ''''Sound Projector Array'''' or SPA. This model is typically used on smaller intakes.

FGS Mk II 30-600 Sound Projector
The FGS Mk II 30-600 sound projector is used typically on larger intakes.Deployment System. A deployment system allows the sound projectors to be lowered and raised for maintenance. Deployment systems may take many forms ranging from a simple rail to a custom-made structure, which avoids the need to use divers for maintenance.

FGS 1-08 Signal Generator (1 signal) and (8 signals)
FGS signal generators are based on solid-state digital recording technology. A single signal generator is used where the target fish species are migratory and or non-resident. An eight signal generator is used where there are resident species to avoid habituation to any one signal.

FGS Model 400 Amplifier / Monitor
The signal generator feeds into a bank of audio frequency power amplifiers that boost signal levels to the required output levels for the transducers.

FGS Model 1-03 Diagnostics/Alarm Unit
The FGS Model 1-03 Diagnostics / Alarm Unit is used to monitor the status of control equipment.

info.power@glv.com