Abstract: A method for the deployment and retrieval of data loggers, which are deployed in a first step at separate locations on a supply network having numerous branching pipelines, e.g. for drinking water, which record, in a second step, at least the flow sounds of the medium flowing at the deployed locations, and which, in a third step, are read out by a vehicle driving past, having a readout device disposed therein, wherein the reading device is allocated a GPS module, and that when the data loggers are deployed at the locations assigned to them on the pipeline, the current GPS locations of the data loggers at said locations are stored in the readout device.

Abstract: Method for acoustically locating leaks in underground or aboveground piping systems, in which at least two noise data loggers receiving the leak noise and being arranged in mutual distance from one another are brought in physical contact with the piping system to be examined and measure simultaneously the noise level (dB) and the frequency of a leak, whereas both measured values of frequency and noise level are combined in a single value (ESA), whereas the ESA value is calculated from the decimal logarithm of the frequency of the leak noise multiplied with the logarithmic level value of the leak noise multiplied with a constant factor.

Abstract: Method for acoustically locating leaks in underground or aboveground piping systems, in which at least two noise data loggers receiving the leak noise and being arranged in mutual distance from one another are brought in physical contact with the piping system to be examined and measure simultaneously the noise level (dB) and the frequency of a leak, whereas both measured values of frequency and noise level are combined in a single value (ESA), whereas the ESA value is calculated from the decimal logarithm of the frequency of the leak noise multiplied with the logarithmic level value of the leak noise multiplied with a constant factor.

Abstract: An apparatus for locating leaks in a branching pipeline (1) of a water supply network having numerous leak locating devices (9-11), which enable a locating of leaks at different locations in the water lines (2, 3), e.g. via an acoustic detection of the flow sounds and/or the pressure and/or the flow rate, wherein the locating of leaks occurs via at least one sensor (12) having a measurement component (13) and an evaluation component (14) connected thereto, and a communication link (17) is available for transmitting the detected signal and/or data to the display (21) of a user terminal (20), wherein the communication link (17) is designed as a WLAN connection between the leak locating device (9-11) and the user terminal (20), and an internet browser is allocated to the user terminal (20).

Abstract: A method for the deployment and retrieval of data loggers, which are deployed in a first step at separate locations on a supply network having numerous branching pipelines, e.g. for drinking water, which record, in a second step, at least the flow sounds of the medium flowing at the deployed locations, and which, in a third step, are read out by a vehicle driving past, having a readout device disposed therein, wherein the reading device is allocated a GPS module, and that when the data loggers are deployed at the locations assigned to them on the pipeline, the current GPS locations of the data loggers at said locations are stored in the readout device.

Abstract: The invention relates to a method for error location in branched low voltage and medium voltage networks and to an evaluation network used therefor.

Abstract: A method and apparatus for determining leaks in sewage pipes. The apparatus includes a measuring probe having several radially arranged measuring electrode segments, the measuring probe being positioned in the sewage pipe. With the probe sections and electrode segments being arranged in such radial manner, the electrical probe, once electrically powered, measures a leakage current emitted by the probe's central section with several probes sections at a same electrical potential, and divides the measured leakage currents of the probe's central section in a mathematical operation into two or more electrode segments to determine both an axial and radial location for defects within the sewage pipe. A higher leakage current in one segment indicates the location of a leak, and the amplitude of the leakage current indicates the volume of the leak.

Abstract: A fire-preventive and flame-proof housing for line delay measuring apparatus, the components including a high-tension voltage supply, a display tube and operating elements and indicator elements, comprises a first section defined within the housing in which are positioned components carrying relative low voltages and without significant fire hazard, a second section defined within the housing adjacent to the first section, wherein are positioned those of the components carrying high voltages, and such components as are otherwise intrinsically unsafe, the second section being hermetically sealed and filled with insulating material. The housing includes a front panel and a partition separating the first and second sections, a cover is detachably mounted on the housing and sealed relative thereto by a resilient sealing element about an aperture of the housing.