Hikmicro AD21P Acoustic Leak Detector The Hikmicro AD21P is a professional acoustic leak detector for finding water leaks in homes, businesses and infrastructure, using SuperDetect technology to filter out background noise and isolate the specific sound frequencies associated with a leak. SuperDetect processes sound frequencies across a 150Hz–7500Hz range, giving a clear signal pointing to the leak's location before any digging or floor lifting is needed. Four bandpass filters — low (150–3000Hz), mid (3000–6000Hz), high (4500–7500Hz) and all-pass (150–7500Hz) — allow the range to be narrowed to suit the pipe material, burial depth and ground conditions being worked with. Quick inspection mode gives a fast overview of a route; route inspection mode suits a detailed, systematic investigation of a known pipe path. The 7-inch, 1024