The thermostatic mixer is used in hot water production systems for sanitary use. Its function is to keep the temperature of the mixed water sent to the user constant, at the set value, as the supply conditions of the incoming hot and cold water vary. The mixer also has a thermal closing function in case of lack of incoming cold water. This particular series of mixers has been certified as meeting the requirements of the EN 15092 standard for installation at the distribution point. Patent application