chamber at a temperature between 5 u00b0 c and 200 u00b0 c an ultra sound system 4 i applied to the capillary tubes can also be used to improve the vaporization the vaporizer mixer 4 g has pressure and or temperature and or humidity and or concentration sensors 4 b which send the information to the control computer the chemical product is injected drop by drop into the vaporizer mixer 4 g and is combined with ozone that also enters the vaporizer mixer 4 g through a capillary tube 4 d controlled by an electric valve 4 h the vaporizer mixer is mechanically connected to the sterilization disinfection chamber 1 by a clamp system with a ptfe tube 4 f which conveys the combination of chemical products in gas state to the sterilization disinfection chamber 1 in the best conditions between the dosing pump 5 and the vaporizer mixer valves 4 e 13 a and 13 e there is a return line of the chemical product to remove the air from the tubing of the injection circuit of the chemical product in the drop by drop vaporizer mixer 4 g a filter 4 c will assure that particles or residues do not reach the capillary tube 4 d near the exhaust valve 9 b of the chamber 1 there is an air removing system thanks to a vacuum pump 10 a which removes the air before starting the drop by drop injection in the vaporizer mixer 4 g the gas that comes out of the sterilization disinfection chamber 1 passes through a plasma generator 9 c with high voltage electrodes 9 d.