Abstract: The sensor circuit (105) is configured for sensing of an electrolyte solution, such as an aqueous solution (1000) in a chamber (150). The sensor circuit comprises a signal generator configured for generating signals in a predefined frequency range above 1 MHz. It further comprises a capacitive sensor comprising a first and a second electrode (101, 102), wherein the electrolyte solution (1000) constitutes a medium of the capacitive sensor, and an output circuit for conditioning a response into a sensor signal. Herein, the capacitive sensor is part of a secondary, floating circuit which is coupled in a contactless manner to a primary circuit comprising the signal generator and the output circuit, and wherein said response is transmitted from the secondary circuit.

Abstract: The sanitary appliance (400) comprises a receptacle (410) and a tube (420) provided with a tube wall (401, 402) and configured to contain—in use—an aqueous solution (1000) and a sensor circuit (105) for sensing inflow of matter into the sanitary appliance (400), wherein the sensor circuit (105) comprises a primary circuit and a secondary circuit that are mutually inductively coupled, wherein the inductively coupled secondary circuit includes a capacitive sensor comprising a first and a second electrode (101, 102), each of which are configured to be in use at least partially (101, 192) in contact with the aqueous solution (1000), which constitutes a medium of the capacitive sensor.

Abstract: The sensor circuit (105) is configured for sensing of an electrolyte solution, such as an aqueous solution (1000) in a chamber (150). The sensor circuit comprises a signal generator configured for generating signals in a predefined frequency range above 1 MHz. It further comprises a capacitive sensor comprising a first and a second electrode (101, 102), wherein the electrolyte solution (1000) constitutes a medium of the capacitive sensor, and an output circuit for conditioning a response into a sensor signal. Herein, the capacitive sensor is part of a secondary, floating circuit which is coupled in a contactless manner to a primary circuit comprising the signal generator and the output circuit, and wherein said response is transmitted from the secondary circuit.

Abstract: The sanitary appliance (400) comprises a receptacle (410) and a tube (420) provided with a tube wall (401, 402) and configured to contain—in use—an aqueous solution (1000) and a sensor circuit (105) for sensing inflow of matter into the sanitary appliance (400), wherein the sensor circuit (105) comprises a primary circuit and a secondary circuit that are mutually inductively coupled, wherein the inductively coupled secondary circuit includes a capacitive sensor comprising a first and a second electrode (101, 102), each of which are configured to be in use at least partially (101, 192) in contact with the aqueous solution (1000), which constitutes a medium of the capacitive sensor.

Abstract: The sanitary appliance comprising a receptacle provided with a flow surface and further comprising at least one sensor for sensing flow of urine (a physiological solution) located at a distance from the flow surface of the receptacle, characterised in that the sensor comprises a resonance circuit. Urine flow may be identified at the flow surface in that: (1) a first voltage is provided to a resonance circuit to be modified into a second voltage; (2) the second voltage is sensed and (3) the second voltage is compared with a reference value for identification of urine flow. Furthermore a dirt layer with a thickness at the flow surface may be identified.

Abstract: The sanitary appliance comprising a receptacle provided with a flow surface and further comprising at least one sensor for sensing flow of urine (a physiological solution) located at a distance from the flow surface of the receptacle, characterised in that the sensor comprises a resonance circuit. Urine flow may be identified at the flow surface in that: (1) a first voltage is provided to a resonance circuit to be modified into a second voltage; (2) the second voltage is sensed and (3) the second voltage is compared with a reference value for identification of urine flow. Furthermore a dirt layer with a thickness at the flow surface may be identified.