Success AT-407
the detector has the function:
-search for water leaking from underground pipes (3-6 m)
the set is composed of:
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a receiver
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an acoustic sensor
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headphones
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accumulators
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receptor (AP-027) has a display screen with a chart of signal level.
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receptor (AP-027) keeps in memory of 31 signals.
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also the receiver has an acoustic indication.