A measurement apparatus for measuring a flow rate of a powder , the measurement apparatus comprising: a casing ; a nozzle movably disposed within the casing , the nozzle comprising at least one delivery channel configured to dispense the powder ; a fixture plate disposed within and mounted to the casing , the fixture plate comprising: a main body comprising a top surface facing the nozzle and a bottom surface spaced apart from and opposite to the top surface ; and a plurality of pinhole members extending at least partially from the top surface and spaced apart from each other, wherein each pinhole member from the plurality of pinhole members comprises a tip spaced apart from the top surface , a cylindrical hole extending from the tip towards the top surface , and a discharge passage extending from the bottom surface at least partially through the main body and disposed in fluid communication with the cylindrical hole , wherein the cylindrical hole of each pinhole member has a diameter (D1) and is configured to receive the powder from the nozzle , and wherein the diameters (D1) of the cylindrical holes of the plurality of pinhole members are different from each other; a weighing scale disposed within the casing underneath the fixture plate ; and a powder collector disposed on the weighing scale and facing the fixture plate ; wherein the nozzle is configured to dispense the powder selectively into the cylindrical hole of each pinhole member , and wherein the powder collector is configured to receive at least a portion of the powder from the discharge passage of each pinhole member . a casing ; a nozzle movably disposed within the casing , the nozzle comprising at least one delivery channel configured to dispense the powder ; a fixture plate disposed within and mounted to the casing , the fixture plate comprising: a main body comprising a top surface facing the nozzle and a bottom surface spaced apart from and opposite to the top surface ; and a plurality of pinhole members extending at least partially from the top surface and spaced apart from each other, wherein each pinhole member from the plurality of pinhole members comprises a tip spaced apart from the top surface , a cylindrical hole extending from the tip towards the top surface , and a discharge passage extending from the bottom surface at least partially through the main body and disposed in fluid communication with the cylindrical hole , wherein the cylindrical hole of each pinhole member has a diameter (D1) and is configured to receive the powder from the nozzle , and wherein the diameters (D1) of the cylindrical holes of the plurality of pinhole members are different from each other; a main body comprising a top surface facing the nozzle and a bottom surface spaced apart from and opposite to the top surface ; and a plurality of pinhole members extending at least partially from the top surface and spaced apart from each other, wherein each pinhole member from the plurality of pinhole members comprises a tip spaced apart from the top surface , a cylindrical hole extending from the tip towards the top surface , and a discharge passage extending from the bottom surface at least partially through the main body and disposed in fluid communication with the cylindrical hole , wherein the cylindrical hole of each pinhole member has a diameter (D1) and is configured to receive the powder from the nozzle , and wherein the diameters (D1) of the cylindrical holes of the plurality of pinhole members are different from each other; a weighing scale disposed within the casing underneath the fixture plate ; and a powder collector disposed on the weighing scale and facing the fixture plate ; wherein the nozzle is configured to dispense the powder selectively into the cylindrical hole of each pinhole member , and wherein the powder collector is configured to receive at least a portion of the powder from the discharge passage of each pinhole member . <EOS>