been said the system is modular and can consist of two or more devices 20 with valve bodies 22 connected parallel as drawing 2 clearly illustrates accordingly the aforesaid holes 10 simplify the assembly of several devices 20 creating a compact distribution system that is rapidly stacked a plurality of contacts 10 b will act as a supply bridge to enable the entire distribution system to be supplied connecting a sole device 20 to the electric source in order to control the temperature on the mixed outlet 9 a temperature control probe 6 is located inside the said conduit the probe 6 is connected to the control electronics 1 that can thus precisely adjust the pin 3 control motors to adjust and stabilise the outlet temperature a pressure sensor indicated overall by the reference 7 is provided to control the pressure on the mixed outlet 9 the said pressure sensor comprising a piston 7 a with magnet a magnet field sensor 7 c a spring 7 b the piston 7 a if it is driven by pressure on the outlet approaches the sensor 7 c which will detect the presence of the associated magnet if the outlet pressure fails the spring 7 b positions the piston 7 a with magnet in the rest position the point in which the sensor 7 c is unable to detect the presence thereof said sensor 7 c is connected to the control electronics 1 and provides the system with a precise.