A system and a method for generating three-dimensional image displays with two sensors, in particular two thermal imagers, having two optical channels with fields of view of equal size and with a virtually identical line of sight has at least one image reproduction unit. The connector comprises a first set of contact areas of the first electrical connection and at least one set of complementary contact areas, each set of complementary contact areas being intended to receive one of the complementary electrical connections, only the set of complementary contact areas being surrounded separately by an electromagnetic shielding element. In a dual-phase blend, a mixture having the stannous salt in a first phase and the sodium tripolyphosphate in a second phase may be generated from a dual chamber storage tube immediately prior to dental care usage. A multiphase voltage-controlled oscillator may be used to provide the multiphase clock signals. The interlock is movable between the first and second positions by operation of an operating handle that controls the OFF or OPEN and ON or CLOSED state of an electrical disconnect device located inside the tap-off device.