Pneumatic transportation system for objects, particularly for fragile objects, comprising: - a first transportation duct, having a first end portion and a second opposite end portion, adapted to be passed through by a vector gas for transporting objects inside the duct; - a venturi effect nozzle comprising a nozzle body having an inlet section with an inlet duct and an outlet section with an outlet duct, the outlet duct being connected to the first end portion of the first transportation duct, the venturi effect nozzle comprising a control gate for feeding the venturi effect nozzle with a flow of supply gas having a supply pressure such as to influence the pressure of the flow of vector gas to control the characteristics of the motion of the objects to be transported inside the first transportation duct; - a control system (10, 11, 12) operatively connected to the control gate of the venturi effect nozzle to control the supply pressure and therefore the pressure of the flow of vector gas; wherein: - the venturi effect nozzle comprises a first measurement gate, integrated in the nozzle body, in fluid communication with the outlet duct; and - the control system (10, 11, 12) is operatively connected to the measurement gate to measure the pressure of the flow of vector gas in the outlet duct of the venturi effect nozzle in order to control the supply pressure; characterized in that: - the first measurement gate is arranged in said outlet section; - the pneumatic transportation system comprises a second measurement gate connected to the control system (10, 11, 12) and arranged at or close to the second end portion of the first transportation duct, or downstream of it in the direction of the gas flow, provided to acquire a second pressure measurement of the flow of the vector gas, and wherein the control system (10, 11, 12) is such as to control the supply pressure based on the difference between the pressure of the flow of vector gas measured in said outlet duct and said second pressure measurement acquired. - a first transportation duct, having a first end portion and a second opposite end portion, adapted to be passed through by a vector gas for transporting objects inside the duct; - a venturi effect nozzle comprising a nozzle body having an inlet section with an inlet duct and an outlet section with an outlet duct, the outlet duct being connected to the first end portion of the first transportation duct, the venturi effect nozzle comprising a control gate for feeding the venturi effect nozzle with a flow of supply gas having a supply pressure such as to influence the pressure of the flow of vector gas to control the characteristics of the motion of the objects to be transported inside the first transportation duct; - a control system (10, 11, 12) operatively connected to the control gate of the venturi effect nozzle to control the supply pressure and therefore the pressure of the flow of vector gas; - the venturi effect nozzle comprises a first measurement gate, integrated in the nozzle body, in fluid communication with the outlet duct; and - the control system (10, 11, 12) is operatively connected to the measurement gate to measure the pressure of the flow of vector gas in the outlet duct of the venturi effect nozzle in order to control the supply pressure; - the first measurement gate is arranged in said outlet section; - the pneumatic transportation system comprises a second measurement gate connected to the control system (10, 11, 12) and arranged at or close to the second end portion of the first transportation duct, or downstream of it in the direction of the gas flow, provided to acquire a second pressure measurement of the flow of the vector gas, and wherein the control system (10, 11, 12) is such as to control the supply pressure based on the difference between the pressure of the flow of vector gas measured in said outlet duct and said second pressure measurement acquired.