FIELD : instrument engineering.SUBSTANCE : invention relates to design of a distilled water distillation apparatus used in medical, pharmaceutical, biotechnical, electronic, chemical and other industries. Aqua distillation device with automatic protection system consists of evaporator, condenser, separator and control unit. Evaporator and condenser are detachably connected. Condenser has a pipe condenser and a degassing cap. In the evaporator there is a sensor for contamination of the evaporation chamber located between the condenser and the separator. Level sensor and an overflow sensor are installed in the equalizer of the evaporator. At the inlet of the pipe condenser there is a valve, at the outlet of the pipe condenser there is an adjustable valve and a temperature controller. Control unit is electrically connected with temperature controller sensor, valve, adjustable valve, level sensor, overflow sensor, evaporator contamination sensor and electric heater.EFFECT : increased technological capabilities of aqua distillation device, increased reliability of operation.1 cl, 2 dwg