Abstract: In a circuit arrangement for the non-contacting control of a sanitary fitting, the signal, by which the solenoid valve or valves is/are controlled, is monitored with regard to the leading or decaying edge. If the leading edge appears, then the sensitivity of the entire circuit arrangement is reduced from a higher to a lower value; on the other hand, if the decaying edge appears, then the sensitivity of the circuit arrangement is once more increased to the original higher value, possibly with a time lag. Due to this, a "self-holding effect" due to the flowing water is prevented from occuring.