[en] The invention concerns an alfa-radiation manometer, suitable for use in pressure measurements of gases, e.g. in chemical industry. The gauge consists of a chamber connected to a continuous spectrum alfa-radiation source. There is a scintillator with an optical contact and a photomultiplier and a recorder in front of the alfa-radiation source. An integrator is connected to the photomultiplier and the recorder. The integrator output signal is proportional to the energy that has reached the scintillator for a unit time. It is claimed that the gauge has a significant range extention of pressure measured, high sensitivity and safety