Detecting water leaks systematically by using the most flexible logger available

The principle and fields of application

Using electro-acoustic methods to detect water leaks very much depends on the intensity of all noises surrounding the operator. Therefore during daytime it is often impossible to work that way and the survey of water networks is done in the night.
Non-permanent logging is an effective and economic alternative to night work. These loggers measure the intensity of noises during a defined period of time in the night. In case there is no leak in an audible distance to the SePem® 02 the lowest noise level measured will be almost zero. Due to the fact that leaks do not appear or disappear at a certain time of measuring (like for example consumption does) the recorded values are significantly higher than zero.
Applying SePem® 02 for this kind of network monitoring a suitable set of loggers (depending on the length of the network to be inspected) is first of all programmed to measure in a certain schedule (e. g. a 4 week cycle). Afterwards the units are taken out into the field and simply moved daily to measure in different places every night. Reading them every day is not required due to the large memory of each SePem® 02 logger, but is possible at will. When the defined cycle is done, all units are connected to a PC and the results are downloaded for evaluation. Far more information than just "leak" or "no leak" is given in order to avoid any waste of time in following up the results.
The modular and most flexible SePem® 02 additionally can be used for other measuring applications as well, such as pressure logging or even stationary data recording. The wide range of system components allows connection of the loggers to almost every possible point of contact to the pipe under inspection.

Mounting the logger at any point of contact to the pipe underground is possible (e. g. hydrants or valves). Coupling by magnet or adapter ring.

Using any adapter to M10 thread the logger can even be attached to points above ground.

With the GMS module linked, the logger can be applied for stationary purposes (e. g. long term pressure measurement
or stationary noise monitoring).

For pressure measurement the SePem® 02 can be coupled to DIN underground fire hydrants. Connection to other fittings is possible with adapters to 1" or ¾" BPS threads.

System components

Every SePem® device offers a very flexible power supply. Alkaline batteries or accumulators can be applied.

Many different microphones can be chosen to be connected to the SePem® device. This modularity enables the operator to fulfil different jobs utilising the same logger.

Communication between all loggers and the PC is effected using different types of interfaces.

Boxes are very suitable to be chosen in case a multiple of 6 loggers is used, because they can be integrated into a measuring vehicle or piled up in the office. Cases offer the possibility to store accessories as well, to have them at hand when needed. In case accumulators are used with the SePem® devices, these communication adapters are required for charging.
Carrying cases can pick up 12 loggers and basic accessories.

SePem® SCAN allows the reading of loggers without a PC. Two buttons enable even less experienced users to get results immediately.

SePem® GSM can be linked to any basic SePem® device. After measurement the results are converted into an email and send to any defined account. The operator can download this information by pressing one button of the software on demand.