Tap for a pressurised fluid bottle, comprising a body equipped with an end intended to be mounted in the opening of a pressurised fluid bottle, the body of the tap containing a first drawing-off circuit comprising a first upstream end intended to communicate the storage space of a pressurised fluid bottle and a second downstream end intended to be connected to a member using the drawn-off gas, the first drawing-off circuit comprising a member for regulating the flow rate and/or pressure of the drawn-off fluid between the upstream and downstream ends, the tap comprising a member for manually controlling the regulation member, the control member being mounted so as to be able to move relative to the body of the tap and cooperating with the regulation member in order to control the flow rate and/or pressure of the fluid allowed to flow from the upstream end to the downstream end according to the position of the control member with respect to the body, the tap comprising an electronic device for indicating data relating to the fluid content in a bottle connected to the tap, the electronic indication device comprising a member for acquiring, storing and processing data and at least one data display connected to the acquisition member for storing and processing data, the tap comprising a sensor for the position of the member for manually controlling the regulation member, the position sensor being connected to the member for acquiring, storing and processing data for transmitting to the latter a signal representing the flow rate and/or pressure of a fluid imposed by the regulation member, the member for acquiring, storing and processing data being configured, in response to the reception of this imposed flow rate and/or pressure signal, to control the display on the display of information relating to the mode of use of the tap and in particular to the fluid content and/or to the quantity of fluid drawn off, the tap comprising a pressure sensor intended to measure the pressure in the storage space of a fluid bottle connected to the tap, the pressure sensor being connected to the member for acquiring, storing and processing data and for transmitting to the latter a signal representing the measured fluid pressure, the member for acquiring, storing and processing data being configured to receive both the measured pressure signal from the pressure sensor and the flow rate and/or pressure signal provided by the position sensor, characterised in that the member for acquiring, storing and processing data is configured to calculate, in response, the quantity of fluid remaining and/or drawn off from these two signals, the member for acquiring, storing and processing data being configured: - to calculate an actual value of the quantity of fluid remaining and/or drawn off based on the pressure measurement of the pressure sensor, - to calculate a theoretical value of the quantity of fluid remaining and/or drawn off based on the regulation imposed by the regulation member and measured by the position of the control member, - to compare said actual value based on the measurement of the pressure sensor with the theoretical value imposed by the regulation member, and - to generate an alert signal in the event of divergence between these actual and theoretical values above a determined safety threshold. - to calculate an actual value of the quantity of fluid remaining and/or drawn off based on the pressure measurement of the pressure sensor, - to calculate a theoretical value of the quantity of fluid remaining and/or drawn off based on the regulation imposed by the regulation member and measured by the position of the control member, - to compare said actual value based on the measurement of the pressure sensor with the theoretical value imposed by the regulation member, and - to generate an alert signal in the event of divergence between these actual and theoretical values above a determined safety threshold.