A ripple diaphragm circulator comprising: - a body inside which there is a chamber internal to the body, this chamber comprising at least one inlet opening for fluid into the chamber and at least one outlet opening for fluid out of the chamber; - a flexible diaphragm placed in the chamber so as to be able to ripple there between first and second edges of the diaphragm , the first diaphragm edge being located closer to the fluid inlet opening than to the fluid outlet opening and the second diaphragm edge being located closer to the fluid outlet opening than to the fluid inlet opening ; the circulator further comprising: - an actuating mechanism comprising at least one motor (M) and at least one mechanical linking part linking the motor (M) to the first edge of the diaphragm so as to move it in a reciprocating motion relative to the body in order to produce a ripple on the diaphragm propagating from the first diaphragm edge to the second diaphragm edge , characterized in that the circulator also includes a device for detecting at least one value representative of a movement of the diaphragm relative to the body , this detection device being functionally linked to a motor power supply unit , this power supply unit being arranged to deliver at least one electrical power supply signal to the motor according to a detection signal (Sd) delivered to the power supply unit by said detection device , this detection signal (Sd) being dependent on said at least one detected value. - a body inside which there is a chamber internal to the body, this chamber comprising at least one inlet opening for fluid into the chamber and at least one outlet opening for fluid out of the chamber; - a flexible diaphragm placed in the chamber so as to be able to ripple there between first and second edges of the diaphragm , the first diaphragm edge being located closer to the fluid inlet opening than to the fluid outlet opening and the second diaphragm edge being located closer to the fluid outlet opening than to the fluid inlet opening ; the circulator further comprising: - an actuating mechanism comprising at least one motor (M) and at least one mechanical linking part linking the motor (M) to the first edge of the diaphragm so as to move it in a reciprocating motion relative to the body in order to produce a ripple on the diaphragm propagating from the first diaphragm edge to the second diaphragm edge , characterized in that the circulator also includes a device for detecting at least one value representative of a movement of the diaphragm relative to the body , this detection device being functionally linked to a motor power supply unit , this power supply unit being arranged to deliver at least one electrical power supply signal to the motor according to a detection signal (Sd) delivered to the power supply unit by said detection device , this detection signal (Sd) being dependent on said at least one detected value. - an actuating mechanism comprising at least one motor (M) and at least one mechanical linking part linking the motor (M) to the first edge of the diaphragm so as to move it in a reciprocating motion relative to the body in order to produce a ripple on the diaphragm propagating from the first diaphragm edge to the second diaphragm edge , characterized in that the circulator also includes a device for detecting at least one value representative of a movement of the diaphragm relative to the body , this detection device being functionally linked to a motor power supply unit , this power supply unit being arranged to deliver at least one electrical power supply signal to the motor according to a detection signal (Sd) delivered to the power supply unit by said detection device , this detection signal (Sd) being dependent on said at least one detected value. <EOS>