Method for detecting the presence of a liquid

A device comprising:

• a processing module including a first bias circuit and a sensor controller;
• a reference electrode electrically coupled to the processing module, the reference electrode configured to be set to a reference electric voltage;
• and
• a first sensing electrode electrically coupled to the processing module, the first sensing electrode extending on a main surface of a body, the first sensing electrode configured to be biased, by the first bias circuit, to a bias electric voltage different from the reference electric voltage, the sensor controller being electrically coupled to the reference electrode and electrically coupled to the first sensing electrode through the first bias circuit,
• wherein the sensor controller is configured to:
• while the first sensing electrode is biased to the bias electric voltage, acquire a first charge variation signal indicative of an electric or electrostatic charge variation detected by the first sensing electrode;
• verify whether the first charge variation signal is indicative of a presence of a liquid on the main surface, at the first sensing electrode;
• and
• if the first charge variation signal is indicative of the presence of the liquid on the main surface, determine the presence of the liquid on the main surface at the first sensing electrode.

A non-transitory computer program product storable in a sensor controller of a detection device,

• the detection device including
• a processing module including a first bias circuit and the sensor controller,
• a reference electrode electrically coupled to the processing module, the reference electrode configured to be set to a reference electric voltage, and
• a first sensing electrode electrically coupled to the processing module, the first sensing electrode extending on a main surface of a body, the sensor controller being electrically coupled to the reference electrode and electrically coupled to the first sensing electrode through the first bias circuit,
• the first bias circuit being configured to bias the first sensing electrode to a bias electric voltage different from the reference electric voltage,
• the computer program being designed such that, when executed, the sensor controller becomes configured to:
• while the first sensing electrode is biased to the bias electric voltage, acquire a first charge variation signal indicative of an electric or electrostatic charge variation detected by the first sensing electrode;
• verify whether the first charge variation signal is indicative of a presence of a liquid on the main surface, at the first sensing electrode;
• and
• if the first charge variation signal is indicative of the presence of the liquid on the main surface, determine the presence of the liquid on the main surface at the first sensing electrode.