Tap comprising a body housing a draw-off circuit (3) comprising a first upstream end (24) and a second downstream end (23) intended to be connected to a member using the withdrawn gas, the draw-off circuit (3) comprising a member (4) for regulating the flow and / or the pressure of the fluid, the tap (1) comprising a member (5) for manual control of the regulator (4), the control member (5) being mounted movable relative to the valve body (1), the valve (1) comprising a sensor (9) for the position of the control member (5) configured to generate an electrical signal representative of the position of the latter or of the flow and / or of the fluid pressure imposed by the regulating member (4), the position sensor comprising at least one detectable element (19) located on the valve body (1) or, respectively, on the member (5) control, and at least one measuring element (29) located on the control member (5) or, respectively, on the valve body (1), at least one of: the at least one detectable element (19), the at least one measuring element (29) being covered or enclosed in a membrane (16) protection.
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