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The LD-15 Professional’s Leak Survey Instrument is primarily
designed for water leak “surveys,” the term used
for listening for water leaks at hydrants, meters, and valves: |
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Surveying
at a meter with the optional contact rod |
Surveying
at a hydrant with the sensor and magnet |
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Amplifier
with Meter Display and Filter Controls |
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Padded
Case and Standard Belt (40 inches) |
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High
Sensitivity Sensor and Cable |
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Base
Plate for Listening on Street Surfaces |
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Aviation-Grade
Stereo Headphones |
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Heavy-Duty
ABS Plastic Carrying Case |
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40
inches Long Contact Rod (not shown) |
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60
inches Long Contact Rod (not shown) |
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Large
Size Belt (50 inches) |
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Extra
Large Size Belt (60 inches) |
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The Amplifier
has a large Meter Display, Volume Control, Mute Switch (also
serves as ON/OFF), and Filter Range Switch:

Use
the Meter Display to compare the loudness of leaks at
different locations. |
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The
LD-15 requires 4 “C” size batteries:

With
alkaline batteries, normal life is 80 hours.
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Turn
down the Volume Control before pressing the
Mute Switch. With the Mute Switch depressed, adjust the Volume
Control to hear the sounds comfortably.

There
are two Filter Ranges:
High:
30 Hz to 5000 Hz
Low: 30 Hz to 800 Hz
Use the High Range for water leak surveying and the Low Range for water leak
pinpointing.
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