Abstract: A scanning valve for a multi-point gas pressure measuring system, employing a pressure transducer, having a commutator and its drive. The commutator has a stator having an inner space defined by a surface of revolution, a rotor disposed within the inner space and operatively connected to the commutator drive. On the cylindrical surface of the rotor, there are provided annular channels arranged in planes extending at right angle to the rotor axis of rotation and connecting grooves each communicating with one of the annular channels. The stator is provided with inlet ports arranged in groups along the rotor axis of rotation and in each group-within the length of one connecting groove, as well as with outlet ports communicating with the annular channels.