Abstract: The invention relates to a system (1) for measuring at least one physical characteristic for a pneumatic assembly (21), comprising a device (9) for detecting the physical characteristic, a device (11) for wireless transmission of values representing the measurements obtained by the detection device (9), a one-way fluid passage device (13) for inflating the pneumatic assembly (21), and a source (15) of electrical energy. According to the invention, the measuring system (1) comprises an electrically conductive metal body (3) closed by a cover (5) made of material transparent to the waves of the wireless transmission device (11), allowing the body (3) to be used as a receptacle which provides for stable positioning, the transmission of electrical energy, and the mechanical protection of the devices (9, 11) of the measuring system (1) while allowing wireless transmission through the cover (5) of values representing the measurements obtained by the detection device (9).