An apparatus (1a, 1b, 13, 25) for hand sanitisation by application of ozone, the apparatus comprising, - a disinfecting chamber (3, 3,', 110) having - at least one port adapted for insertion of at least one hand into the disinfecting chamber (3, 110), - at least one sensor adapted for detection of an entry and/or exit of the at least one hand into the disinfecting chamber (3, 110), - at least one ozone water output (7,130) of an ozone water supply that comprises an electrolytic ozone generator and being arranged to deliver ozone water to the at least one hand when inserted into the disinfecting chamber (3,3', 110), - a control means which - is arranged to start a discharge of ozone water from the at least one ozone water output (7, 130) into the disinfecting chamber (3,3', 110) when the at least one sensor detects entry of the at least one hand into the disinfecting chamber (3,3', 110), - is arranged to stop the discharge of ozone water from the at least one ozone water output (7, 130) in response to an input from the control means, - comprises a timer arranged to cooperate with the at least one sensor to regulate a sanitisation timing of the at least one hand inserted in the disinfecting chamber (3, 110), wherein the at least one ozone water output (7,130) of the disinfecting chamber (3,110) comprises a first plurality of ozone water delivery openings arranged in a first pattern selected to deliver and spread a flow of ozone water over the palm of the inserted at least one hand wherein said flow of ozone water is directed towards the palm to disinfect all areas of the inserted at least one hand from above, and/or a second plurality of ozone water delivery openings arranged in a second pattern selected to deliver and spread a flow of ozone water over the back of the inserted at least one hand, wherein said flow of ozone water is directed towards the back of the hand to disinfect all areas of the inserted at least one hand from below. - a disinfecting chamber (3, 3,', 110) having - at least one port adapted for insertion of at least one hand into the disinfecting chamber (3, 110), - at least one sensor adapted for detection of an entry and/or exit of the at least one hand into the disinfecting chamber (3, 110), - at least one ozone water output (7,130) of an ozone water supply that comprises an electrolytic ozone generator and being arranged to deliver ozone water to the at least one hand when inserted into the disinfecting chamber (3,3', 110), - at least one port adapted for insertion of at least one hand into the disinfecting chamber (3, 110), - at least one sensor adapted for detection of an entry and/or exit of the at least one hand into the disinfecting chamber (3, 110), - at least one ozone water output (7,130) of an ozone water supply that comprises an electrolytic ozone generator and being arranged to deliver ozone water to the at least one hand when inserted into the disinfecting chamber (3,3', 110), - a control means which - is arranged to start a discharge of ozone water from the at least one ozone water output (7, 130) into the disinfecting chamber (3,3', 110) when the at least one sensor detects entry of the at least one hand into the disinfecting chamber (3,3', 110), - is arranged to stop the discharge of ozone water from the at least one ozone water output (7, 130) in response to an input from the control means, - comprises a timer arranged to cooperate with the at least one sensor to regulate a sanitisation timing of the at least one hand inserted in the disinfecting chamber (3, 110), - is arranged to start a discharge of ozone water from the at least one ozone water output (7, 130) into the disinfecting chamber (3,3', 110) when the at least one sensor detects entry of the at least one hand into the disinfecting chamber (3,3', 110), - is arranged to stop the discharge of ozone water from the at least one ozone water output (7, 130) in response to an input from the control means, - comprises a timer arranged to cooperate with the at least one sensor to regulate a sanitisation timing of the at least one hand inserted in the disinfecting chamber (3, 110),