Systematic monitoring of a water pipe network with a SePem 155 data logger from Hermann Sewerin GmbH lets users reliably identify existing leaks and catch new ones early on. It can report a leak after just one night. In a pipe network, water loss caused by a number of smaller leaks added together is likely to be considerably higher than the loss caused by a few spectacular pipe bursts visible on the surface. Noise loggers are capable of reliably detecting both types of leak sites: slowly growing and spontaneously occurring. It can be used for mobile or stationary monitoring of water supply networks. The SePem 01 Master, with its simple and intuitive menu navigation, provides fast and reliable results and can also be reliably operated by less-experienced users. Measuring times and periods of radio activity are freely programmable. 888/592-9916; www.sewerin.com.