Machine for analysing at least one diffusion device for a product capable of being aspirated, respirated, or inhaled by a user of the diffusion device and/or for analysing a product diffused by such a diffusion device, comprising: - an automatic control device; - an inlet compartment with a controlled atmosphere, including at least one support element capable of retaining the diffusion device (11, 12, 13) in the said inlet compartment; - at least one actuator (21 a, 22a, 23a) attached to the diffusion device and controlled by the automatic control device in such a way as to produce specific mechanical actions on the diffusion device; - at least one element (20a, 20b, 20c) for regulating the temperature and/or the humidity of the atmosphere in the inlet compartment, operating under the control of the automatic control device; - at least one element (121 a, 122a, 123a, 24, 25) for regulating the pressure, temperature, and/or humidity in the outlet compartment, controlled by the automatic control device in such a way as to obtain in the atmosphere of the outlet compartment predetermined conditions of pressure, temperature, and/or humidity; - at least one ventilation element (221,222, 223) connected to the diffusion device and configured such as to incur a flow entering the diffusion device from the inlet compartment and simultaneously force in the outlet compartment a flow emerging from the diffusion device, the said ventilation element being controlled by the automatic control device in such a way as to produce ventilation with predetermined characteristics; and - at least one analysis hardware element (21 c, 22c, 23c, 26) allowing for the analysis of a flow diffused by the diffusion device, which is forced into the outlet compartment in order to determine the state of functioning of the diffusion device or to characterise the diffused flow. - an automatic control device; - an inlet compartment with a controlled atmosphere, including at least one support element capable of retaining the diffusion device (11, 12, 13) in the said inlet compartment; - at least one actuator (21 a, 22a, 23a) attached to the diffusion device and controlled by the automatic control device in such a way as to produce specific mechanical actions on the diffusion device; - at least one element (20a, 20b, 20c) for regulating the temperature and/or the humidity of the atmosphere in the inlet compartment, operating under the control of the automatic control device; - at least one element (121 a, 122a, 123a, 24, 25) for regulating the pressure, temperature, and/or humidity in the outlet compartment, controlled by the automatic control device in such a way as to obtain in the atmosphere of the outlet compartment predetermined conditions of pressure, temperature, and/or humidity; - at least one ventilation element (221,222, 223) connected to the diffusion device and configured such as to incur a flow entering the diffusion device from the inlet compartment and simultaneously force in the outlet compartment a flow emerging from the diffusion device, the said ventilation element being controlled by the automatic control device in such a way as to produce ventilation with predetermined characteristics; and - at least one analysis hardware element (21 c, 22c, 23c, 26) allowing for the analysis of a flow diffused by the diffusion device, which is forced into the outlet compartment in order to determine the state of functioning of the diffusion device or to characterise the diffused flow.