A method for testing packaged integrated circuits having bent or broken leads. The actuator includes: the piezoelectric element, which is capacitive; an inductor; and a resistor. The rear group includes one negative lens and one positive lens. The lip portion has at least one downwardly extending portion that removeably interlocks with the receiving opening of the pet bowl. Said at least one circuit board comprises circuit components managed by an integrated software for setting at least one analogue output value according to any pressure value measurable by the pressure sensor. The production cost of the electrodes thus obtained is reduced and the surface porosity thereof is associated with desirable resistance values.