ST20 LISTENING STICK

ST20 LISTENING STICK High-performance mechanical acoustic tool for leak detection The ST20 Listening Stick is a robust, high-sensitivity mechanical listening instrument designed for fast and accurate water leak detection on external water distribution networks. It uses pure mechanical amplification through an acoustic resonant chamber, significantly improving leak sound detection on valves, hydrants, service connections, and other pipe fittings. The stick consists of two chromium-plated steel sections that screw together, forming a standard 1.5-meter length. A compact 1-meter version is also available. Leak vibration signals are transmitted through the steel rod to a brass diaphragm inside the resonant cavity, where the noise is mechanically amplified, allowing the operator to clearly distinguish leak noise from ambient system noise—without any electronics. Constructed from chrome-plated mild steel, the ST20 is durable, easy to use, and ideal for both professional leak technicians and users who may find electronic listening devices difficult to interpret. Added benefit A perfect solution for quick valve sound checks — simple, rugged, and practically eternal. An essential instrument for any leak detection technician working on external water mains.