An apparatus for sensing at least one parameter in a liquid including a sensor means for sensing the parameter, a rotation means and a drive generator means for driving the rotation means as well as to generate electricity passed to an electricity storage means. Level data associating a user of a multi-user application with a respective log level is received. The integration circuit and the current supply unit are connected to another terminal of the capacitive element. These push update tasks are then sequentially executed. A response output selecting unit selects response outputs of the response output unit for each of the local areas in accordance with the spatial and time correlation functions.