An apparatus for metering a flow of a fluid through a cylindrical tube section, comprising: - a flow deviating body configured to be arranged in the tube section such that an annular flow channel remains between an outer diameter of the flow deviating body and an inner diameter of the cylindrical tube section, - a high pressure tap at a front point of the flow deviating body configured to tap a high pressure of the fluid, - at least one low pressure tap located at the outer diameter of the flow deviating body and configured to tap a low pressure of the fluid in the annular flow channel, and - at least one pressure transducer (22, 25) configured to transduce at least one of - both the high pressure and the low pressure, and - a pressure difference between the high pressure and the low pressure into electric signals, - wherein the flow deviating body has a cylindrical middle section, - wherein supports are provided at the flow deviating body, the supports being configured to support and align the flow deviating body within the cylindrical tube section, and - wherein the at least one low pressure tap configured to tap the low pressure of the fluid in the annular flow channel is offset in circumferential direction with regard to the supports, characterized in - that the flow deviating body is of an elongated drop shape having a rounded front end, the cylindrical middle section and at a tipped back end, - that the supports consist of a first plurality of fins and a second plurality of fins, the first plurality of fins being provided at the rounded front end of the flow deviating body, and the second plurality of fins being provided at the tipped back end of the flow deviating body, and - that the at least one low pressure tap configured to tap the low pressure of the fluid in the annular flow channel is offset in circumferential direction with regard to the fins of the first plurality of fins. - a flow deviating body configured to be arranged in the tube section such that an annular flow channel remains between an outer diameter of the flow deviating body and an inner diameter of the cylindrical tube section, - a high pressure tap at a front point of the flow deviating body configured to tap a high pressure of the fluid, - at least one low pressure tap located at the outer diameter of the flow deviating body and configured to tap a low pressure of the fluid in the annular flow channel, and - at least one pressure transducer (22, 25) configured to transduce at least one of - both the high pressure and the low pressure, and - a pressure difference between the high pressure and the low pressure into electric signals, - both the high pressure and the low pressure, and - a pressure difference between the high pressure and the low pressure into electric signals, - wherein the flow deviating body has a cylindrical middle section, - wherein supports are provided at the flow deviating body, the supports being configured to support and align the flow deviating body within the cylindrical tube section, and - wherein the at least one low pressure tap configured to tap the low pressure of the fluid in the annular flow channel is offset in circumferential direction with regard to the supports, - that the flow deviating body is of an elongated drop shape having a rounded front end, the cylindrical middle section and at a tipped back end, - that the supports consist of a first plurality of fins and a second plurality of fins, the first plurality of fins being provided at the rounded front end of the flow deviating body, and the second plurality of fins being provided at the tipped back end of the flow deviating body, and - that the at least one low pressure tap configured to tap the low pressure of the fluid in the annular flow channel is offset in circumferential direction with regard to the fins of the first plurality of fins.