Ideal for Domestic to Major Pipeline Leak Detection – you have everything covered!
The HL 7000 ground noise detection system provides a wide range of options for locating leaks thanks to the variable design and the automatic 360° sensor recording. Work assignments lasting more than 10 hours are no problem thanks to the powerful lithium-ion rechargeable batteries.
The Bluetooth ® capable, wind-protected piezoelectric ground microphone with integrated pre-amplification clearly picks up extremely low leakage frequencies on soft materials such as PVC or PE, and also high frequencies on steel or cast iron pipes.
The HL7000 can also be used as a powerful pipeline locator.
Sometimes acoustic methods are not sufficient for precise leak locating. In those cases, the HL7000 has the option of attaching a tracer gas sensor allowing leak location via gas injection. The hydrogen-nitrogen mixture of the tracer gas will emanate to the surface from the leak in the pipe and is picked up by the HL7000 to locate the leak.
Additional microphones can be added to make this a perfect leak detector for not only robust leak detection jobs but also for those tricky hard to reach leak detection jobs.
How the HL7000 works
The water escaping directly at the leak location generates a noise which is transmitted through the ground to the surface. With the aid of the ground microphone, the Hydrolux picks up the noise and graphically displays the volume and the frequency spectrum.
Inside the pipe, the escaping water generates a pressure wave. This pressure wave can be heard as leakage noise with the Hydrolux and an attached sensor rod microphone, even at remote contact points of the pipe (valves, hydrants, house connections etc.)
Pinpointing leak location
The noise level at different measurement positions can be displayed along the pipe in order to clearly determine the maximum noise intensity as shown in Figure 2. The GPS position, the level and the audio signal are automatically recorded at each measurement point.
The overall measurement can be stored in the device and displayed on a map on the PC using the HydroluxView software. The stored leak noise can be played back through a simple mouse click.