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Listening Stick
LSP-0.5m / LSP-1.0m / LSP-1.5m / LSVP-1.5m - Fuji Tecom Inc.
Fuji Listening stick is the Oldest but extremely effective at Leak Surveying.
Individual service connection survey is widely practiced by Japanese Non-revenue water specialists. An optimum designed resonance chamber amplifies the leakage noise from various kinds of pipe materials.