Fluid Conservation Systems offers the S30 Surveyor leak-noise amplification system, designed to detect and locate leaking pipes. By placing the sensor in contact with any access point (valve, hydrant, etc.), sound from the pipeline is transmitted through the device’s aviator-quality headphones, allowing operators to listen for leak noise. An analog meter measures noise intensity. http://www.fluidconservation.com, sales@fluidconservation.com