Flowmeter (100) for dosing medicinal gases, comprising a main body (1) having, defined therein, at least one flow supply path that extends between an inlet (2) and an outlet (7)； said flowmeter (100) also comprising at least one flow regulation stage (5) that allows the continuous variation of the flow rate of the medical gas supplied at the outlet (7) and at least one flow measurement device (6) of the type of variable area comprising a reading column (60) that communicates with the flow supply path and internally slides a float (61), whose position indicates the flow rate； said flow measurement device (6) being arranged downstream of said flow regulation stage (5)； wherein it also comprises a pressure stabilization stage (4) arranged in order to intercept said flow supply path upstream of the flow regulation stage (5), wherein said pressure stabilization stage (4 ) is designed to interrupt the flow when the pressure of the medical gas inside an internal chamber upstream of the flow regulation stage (5) exceeds a threshold value, characterized in that said pressure stabilization stage (4) comprises: a piston (40) with a disc facing said internal chamber and a rod that slides tightly inside a guide bushing (41) that communicates with the inlet (2)； and elastic means associated with the piston (40) and designed to oppose the pressure of the fluid within the internal chamber； the rod of said piston (40) having an inner channel connecting the guide bushing (41) with the internal chamber, whose access is interrupted when said rod reaches an end-of-travel position inside the guide bushing (41), in wherein said main body (1) is composed of a plurality of covers joined together, said guide bushing (41) being integrally formed on a first cover (10), the inner chamber being limited by the inner walls of a second cover (eleven)； wherein said reading column (60) is supported by a plate (13) that is slidably inserted in the upper part of said second cover (11).Caudalímetro (100
