a decontaminator forming a hydroalcoholic product dispenser, comprising a container of a hydroalcoholic product;

at least one badge with a Near Field Communication (NFC) tag included or pasted thereto, and/or at least one object carrying an NFC tag;

a first clock providing a first day and time of decontamination by means of the decontaminator;

a sabot at an entrance to said sensitive room, comprising an NFC tag reader and being equipped with a second clock synchronous with the first clock of the decontaminator providing a second day and time,

wherein the system is configured to trigger decontamination by the decontaminator when said badge is appended thereunto or introduced therein, and to write the first day and time of decontamination on said NFC tag by a specialized circuit;

wherein the system is configured to authorize entry into said sensitive room if a first period corresponding to the time elapsed between the first time and day of decontamination, to the second time and day of presentation and appendance of said badge unto the sabot, is less than a second predetermined period to consider persistence of the decontamination; in the opposite case, the system is configured to prohibit said entry into said sensitive room,

and wherein the decontaminator comprises an activation means for activating the dispensing of hydroalcoholic product by detection of hand in a distribution path of the hydroalcoholic product, such that a gel triggering signal is then controlling the writing of the time on the badge.