A pulsating flow meter for determining a fluid flow rate within a process fluid flow conduit configured to convey process fluid in a downstream direction, the pulsating flow meter comprising: a housing having an inner volume, an inlet for receiving process fluid from the process fluid flow conduit into the inner volume, and an outlet for delivering the process fluid from the inner volume into the process fluid flow conduit, wherein the housing defines the interior of the housing having a longitudinal housing length and a radial housing diameter, the housing further defining a longitudinal axis; a bluff body disposed within the housing, the bluff body having a cylindrical shape; an orifice plate disposed within the housing, the orifice plate having an orifice, an orifice plate thickness, and an orifice plate diameter, wherein the orifice plate is located down stream of the bluff body at a defined distance from the bluff body such that the orifice plate is operable to impart a pulsating flow on the process fluid as a result of passing through the orifice, the pulsating flow having a pulsating frequency, wherein the orifice plate diameter is substantially equal to the housing diameter; and means to detect the pulsating frequency of the pulsating flow and determine the fluid flow rate based on the detected pulsating frequency, characterised in that: the housing diameter is 20 to 30 percent of the housing length; the bluff body has a diameter of 10 to 20 percent of the housing diameter; the bluff body is located at a distance from the inlet of 5 to 15 percent of the housing length; the orifice plate thickness is within the range of 2 to 4 percent of the housing diameter; the orifice is 60 percent of the housing diameter; and the defined distance between the orifice plate and the bluff body is a distance of 40-60 percent of the housing diameter. a housing having an inner volume, an inlet for receiving process fluid from the process fluid flow conduit into the inner volume, and an outlet for delivering the process fluid from the inner volume into the process fluid flow conduit, wherein the housing defines the interior of the housing having a longitudinal housing length and a radial housing diameter, the housing further defining a longitudinal axis; a bluff body disposed within the housing, the bluff body having a cylindrical shape; an orifice plate disposed within the housing, the orifice plate having an orifice, an orifice plate thickness, and an orifice plate diameter, wherein the orifice plate is located down stream of the bluff body at a defined distance from the bluff body such that the orifice plate is operable to impart a pulsating flow on the process fluid as a result of passing through the orifice, the pulsating flow having a pulsating frequency, wherein the orifice plate diameter is substantially equal to the housing diameter; and means to detect the pulsating frequency of the pulsating flow and determine the fluid flow rate based on the detected pulsating frequency, characterised in that: the housing diameter is 20 to 30 percent of the housing length; the bluff body has a diameter of 10 to 20 percent of the housing diameter; the bluff body is located at a distance from the inlet of 5 to 15 percent of the housing length; the orifice plate thickness is within the range of 2 to 4 percent of the housing diameter; the orifice is 60 percent of the housing diameter; and the defined distance between the orifice plate and the bluff body is a distance of 40-60 percent of the housing diameter. the housing diameter is 20 to 30 percent of the housing length; the bluff body has a diameter of 10 to 20 percent of the housing diameter; the bluff body is located at a distance from the inlet of 5 to 15 percent of the housing length; the orifice plate thickness is within the range of 2 to 4 percent of the housing diameter; the orifice is 60 percent of the housing diameter; and the defined distance between the orifice plate and the bluff body is a distance of 40-60 percent of the housing diameter.