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SubSurface LD-12 Leak Detector

The LD-12 water leak detector is a very easy-to-use detector, featuring six filters that allow the unit to screen outside noise and zero in on water leaks. Selective noise amplifiers help to zero in on true leak sounds. Standard features include an amplifier with meter display and filter controls, ground microphone and hand switch, aviation-grade stereo headphones and heavy-duty ABS plastic carrying case.

Additional product info

Product details

  • Large meter display (with backlight) of sound loudness.
  • Light weight amplifier, with a padded carrying case and a strap.
  • Six selectable filters, split into three “low side” filters (100Hz, 200Hz, or 400Hz) and three “high side” filters (600Hz, 800Hz, or 1200Hz).
  • “Limiter” switch which cuts off all loud noises greater than 110dB.
  • “Filter-Thru” switch, which turns OFF all of the amp’s filters, allowing the user to hear all sounds from 50Hz to 15,000Hz.
  • High-sensitivity ground microphone and low “electronic noise” amplifier combine to offer the very best quality sound for leak detection.
  • Three accessories for attachment to the sensor, for variable applications.

Package includes

  • Amplifier with Meter Display and Filter Controls
  • Ground Microphone and Handswitch (Mute)
  • Aviation-Grade Stereo Headphones
  • Heavy-Duty ABS Plastic Carrying Case
  • Magnet Base
  • 3-Section Contact Rod
  • Nut Driver (to remove base)
  • Instruction Manual


The SubSurface LD-12 is the ultimate Leak Detector for customizaton and versatility. For range, the LD-12 offers six frequency filters, with low side filters (100Hz, 200Hz, or 400Hz) and high side filters (600Hz, 800Hz, or 1200Hz). In addition, the Filter-Thru switch feature can turn the filters off, enabling the whole range of 50Hz to 15,000Hz.

The combo of both noise amplication and reduction selectively filter audio. The protective “limiter” switch cuts off all loud noises greater than 110dB. Plus, the high-sensitivity ground microphone and low electronic noise amplifier zero in on nothing but the leak sounds.

The Ld-12 comes with three accessories for attachment to the sensor: ground plate for pinpointing on concrete, magnet base for surveying at hydrants or valves, and contact rod for surveying at meters.

Other features include a large, back-lighted meter display for sound loudness, and amplifier weighing only 31 ounces, with a padded carrying case and strap.


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