A powder conveying device, in particular for coating powder, wherein the powder conveying device comprises the following: - a pneumatically actuatable dense phase powder pump comprising at least one conveyor chamber having a powder inlet valve and a powder outlet valve, wherein the powder inlet valve and powder outlet valve are respectively designed as pneumatically actuatable pinch valves and are able to close upon application of an actuating pressure; - a pressure regulator for setting and maintaining a predefined or definable set pressure on the at least one conveyor chamber of the dense phase powder pump and/or for setting and maintaining a predefined or definable actuating pressure on the powder inlet valve or powder outlet valve respectively; - a gas flow volume detection device (D1, D2, D3, D4) for detecting or respectively determining the volume of gas fed to or discharged from the at least one conveyor chamber per unit of time when setting and maintaining the set pressure and/or for detecting the volume of gas fed to the powder inlet valve or powder outlet valve respectively per unit of time when setting and maintaining the actuating pressure; and - an evaluation device designed to compare at least one detected or determined value of gas flow volume to a corresponding set value, wherein the evaluation device is further designed to automatically emit an error and/or warning signal upon the at least one detected value of gas flow volume deviating from the respective set value, preferably as a function of the magnitude of the deviation, characterized in that a sensor device (S1, S2) is provided to detect at least one set pressure value at the powder inlet valve upon the actuation of said powder inlet valve and/or to detect at least one set pressure value at the powder outlet valve upon the actuation of said powder outlet valve and/or to detect at least one set negative pressure value in the at least one conveyor chamber during a powder suction phase of the dense phase powder pump and/or to detect at least one set positive pressure value in the at least one conveyor chamber during a powder discharge phase or flushing operating mode of the dense phase powder pump. - a pneumatically actuatable dense phase powder pump comprising at least one conveyor chamber having a powder inlet valve and a powder outlet valve, wherein the powder inlet valve and powder outlet valve are respectively designed as pneumatically actuatable pinch valves and are able to close upon application of an actuating pressure; - a pressure regulator for setting and maintaining a predefined or definable set pressure on the at least one conveyor chamber of the dense phase powder pump and/or for setting and maintaining a predefined or definable actuating pressure on the powder inlet valve or powder outlet valve respectively; - a gas flow volume detection device (D1, D2, D3, D4) for detecting or respectively determining the volume of gas fed to or discharged from the at least one conveyor chamber per unit of time when setting and maintaining the set pressure and/or for detecting the volume of gas fed to the powder inlet valve or powder outlet valve respectively per unit of time when setting and maintaining the actuating pressure; and - an evaluation device designed to compare at least one detected or determined value of gas flow volume to a corresponding set value,