DEVICE FOR MEASURING FLOW RATE OF FLUID MEDIUM

The invention relates to measurement of parameters of a fluid flow through a pipe. Measurement device for determining the flow rate of a fluid flowing in a pipe in a main flow direction, comprises a diverting unit connected to the pipe and adapted to-divert the fluid flow from the axis of the main flow direction in the pipe and directing the flow to a measuring section, wherein the diverting unit is a sealed reservoir having an inlet portion connected to an inlet pipe, an outlet portion connected to an outlet pipe and a diverting portion connected to the inlet portion and the outlet portion and comprising a tubular member disposed at least partly in the diverting portion and the outlet portion, wherein the tubular member has a measuring section comprising fluid flow rate measuring means, and a connecting section for connecting the tubular member to the outlet pipe, wherein the ratio of the cross sectional area of each of the inlet portion, the outlet portion and the diverting portion to the cross sectional area of the pipe is from 1:1 to 4:1.