The invention relates to a belt for measuring physical quantities of an object, including at least one measuring sensor (5), a strap (10) and a device for tightening the strap around the object. According to the invention, the belt includes a device (50) for pressing the measuring sensor (5) in a first direction (55) towards the object, including a casing (53) fastened to the strap (10), an intermediate part (52) and a stress member (51) designed to make the intermediate part (52) take a lowered first position in which it presses towards the sensor (5) in the first direction (55), and a raising member (54) for holding the intermediate part (52) in a raised second position above the first position, against the action of the stress member (51), the raising member (54) being actuatable from the exterior of the casing (53) in order to make the intermediate part (52) pass from the raised second position to the lowered first position in which it presses towards the sensor (5).