Patent ID: 8717183

Claim:
A leak detector for detecting and locating leaks in a water supply pipe of plastics, the leak detector comprising: a first sensor at a first position arranged to detect a leak signal travelling along a pipe; a second sensor arranged to detect a leak signal travelling along the pipe at a second position spaced from the first position; and a processing device adapted to: receive the signals from the first and second sensors; fine filter the signals from the first and second sensors using first filter settings; analyse the fine filtered signals from the first and second sensors to identify a frequency range where leak signals are present; fine filter the signals from the first and second sensors using second filter settings, based on the identified frequency range; using the leak signals fine filtered with the second filter settings, determine a velocity of the leak signals from measurement of characteristics of the leak signals; and using the velocity and a distance between the first sensor and the second sensor, determine a location of a leak.