Suppliers to the Subsurface Utility Engineering Community
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SubSurface Leak Detection LD-15 Professional's Water Leak Survey Instrument

Download the brochureLD-15 Sensor w/base plateThe LD-15’s sensitivity and frequency range are optimized for effective water leak “surveying” at hydrants, meters, and valves. When a water distribution system suffers high “unaccounted for water loss,” then a leak “survey” with acoustic listening devices or other tools is often recommended. The LD-15’s high sensitivity sensor with Neodymium magnet (extra strong) and superior audio quality allow the user to hear the smallest leaks possible. LD-15 display

The sensor and cable connection are completely sealed and waterproof (submersible). The amplifier has superior audio quality (very low distortion and superior signal-to-noise ratio) and large meter display.

Press the Mute Switch to hear sounds when you are ready. “Survey” for water leaks by listening at hydrants and valves with the sensor and magnet. Survey at water meters with a Long Contact Rod (optional). “Pinpoint” water leaks in pipes under asphalt or concrete with the base plate attached to the sensor and magnet. Use the High filter range for water leak surveying. Use the Low filter range for water leak pinpointing. High frequency leak sounds travel on the pipes, but only low frequencies pass through the soil.

Included Items:

  • 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

LD-15 Kit


  • 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)