The SubSurface Instruments LD-15 Professional Leak Survey Equipment offers the best solution for listening to leaks at hydrants, valves, and meters. It features a high-sensitivity sensor with Neodymium magnet which is entirely sealed and is water-proof. Also, it has an amplifier with superior audio quality and has an amplification of 56 decibels.
This leak survey equipment includes three filter ranges - high range (30 Hz to 5,000Hz), low range (30 Hz to 800 Hz) and notch filter (150 Hz, 180 Hz). It also comes with a Survey and Pinpoint function for water leaks in pipes under asphalt or concrete. Plus, the sensor has a resonance frequency of 950 Hertz which can detect the tiniest sounds.
With an IP68 protection rating, the LD-15 equipment is dustproof and even water submersible up to three feet for three hours. Also, it comes with a large meter display for easy reading. In addition, it uses four C-cell batteries that power the unit up to 80 hours of battery life.