Abstract: A water meter (1) comprising: a volume flow-measuring device (2) by means of which a volume flow of a liquid flowing through a water pipe (3) can be measured from outside the water pipe (3); and a clamping device (4) by means of which the water meter (1) can be clamped to the water pipe (3). In addition, a method for attaching a water meter (1) to a water pipe (3).

Abstract: A method for detecting a leak, having at least the following steps: a) capturing a flow volume of a liquid through a liquid line during a multiplicity of liquid removal processes; b) comparing the flow volumes of the liquid in the respective liquid removal processes with an alarm value; c) outputting an alarm signal if the flow volume of the liquid in a liquid removal process exceeds the alarm value; d) adapting the alarm value on the basis of a frequency of the occurrence of the flow volumes of the liquid in the liquid removal processes above an adaptation value.

Abstract: A water meter (1) comprising: a volume flow-measuring device (2) by means of which a volume flow of a liquid flowing through a water pipe (3) can be measured from outside the water pipe (3); and a clamping device (4) by means of which the water meter (1) can be clamped to the water pipe (3). In addition, a method for attaching a water meter (1) to a water pipe (3).

Abstract: A method and apparatus for detecting users of a sanitary installation, with which at least one sanitary sensor system is associable. At least one use profile is detected for at least one user of the sanitary installation via the at least one sanitary sensor system in a first timeframe. The specified use profile is associated with at least one specified user in a database. The use profile of the sanitary installation is monitored by the at least one sanitary sensor system in a second timeframe. A specific use profile of at least one specified user is identified from the use profile of the sanitary installation, an individual use of at least one specified user is ascertained from the use profile of the sanitary installation, and/or an ascertained individual use of at least one specified user is stored in the database.

Abstract: A method for detecting a leak, having at least the following steps: a) capturing a flow volume of a liquid through a liquid line during a multiplicity of liquid removal processes; b) comparing the flow volumes of the liquid in the respective liquid removal processes with an alarm value; c) outputting an alarm signal if the flow volume of the liquid in a liquid removal process exceeds the alarm value; d) adapting the alarm value on the basis of a frequency of the occurrence of the flow volumes of the liquid in the liquid removal processes above an adaptation value.