The invention provides measurement equipment for measuring the inflation pressure of a tire of a vehicle wheel 1, the equipment comprising: a body 16 defining an internal volume; a communication orifice 19 for putting the inside volume of the body 16 into communication with an inflation chamber situated between a rim 2 and a tire of the wheel and containing an inflation gas; an indicator member 25 slidably mounted in the body 16 so as to define a gastight separation between a first chamber 26 containing a given quantity of a reference gas and a second chamber 27 into which the communication orifice 19 leads, such that the indicator member 25 is subjected to opposing pressures that exist in each of the chambers; and position-identification means 30 for identifying the position of the indicator member in the body.