An installation for processing by induction a metallic material is disclosed. Here, the matching address represents a match between the apparatuses addresses. The probe tip is configured to apply the microwave signal to the process fluid. The decreasing potential levels facilitate high charge transfer efficiency from pixel to pixel via the control or transfer gates. The first address pointer and a second portion of the first received address access a particular entry in the address table in the second memory circuit. The refractive index of a liquid contained in the capillary is determined from the angle at which a marked change in the intensity of the interference fringes of the interference pattern formed by said back reflected light is observed or from the amplitude of a low frequency component of the angular variation of the intensity of interference fringes.