A cell, and a transmission network formed from a plurality thereof, for communicating information at directional radio frequencies. The treatment fluid is applied in the form of liquid droplets onto at least one slide, the arrangement of liquid droplets corresponding to the arrangement of the thin tissue sections on the carrier plate. If the MOS transistor is unprogrammed, then the resistive element ensures that the programmable transistor is turned off during read operations. A proportionalintegralderivative algorithm controls wheel speed and is monitored for normal operation. The delivery regulator device and the mixer control device with relative thermostatic bulb are assembled and housed ready to operate in a cartridge body inserted as a whole in a tap body which has means of transporting hot and cold water towards a mixer chamber and means of delivering the water towards the user point.