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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:
Surveying at a meter with the optional contact rod Surveying at a hydrant with the sensor and magnet
 

The LD-15 can also be used for water leak “pinpointing,” the term used for finding the exact location of water leaks:
The LD-15 includes standard accessories and optional accessories for water leak surveying and pinpointing:
 
Pinpointing directly over the
pipe with the LD-15’s base plate
 
Amplifier with Meter Display and Filter Controls
Padded Case and Standard Belt (40 inches)
High Sensitivity Sensor and Cable
Base Plate for Listening on Street Surfaces
Aviation-Grade Stereo Headphones
Heavy-Duty ABS Plastic Carrying Case
40 inches Long Contact Rod (not shown)
60 inches Long Contact Rod (not shown)
Large Size Belt (50 inches)
Extra Large Size Belt (60 inches)

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.
 

The LD-15 requires 4 “C” size batteries:

With alkaline batteries, normal life is 80 hours.
 

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.

More LD-15 Information:

LD-15 Product Page

LD-15 Field Applications for Surveying and Pinpointing

Comparison of the LD-15 Leak Survey Instrument With the LD-12 Water Leak Detector

5 Year Warrranty
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