Vortex Flowmeter By Addmas Measurements

We are reliable company for manufacturing, exporting and supplying wide range of Vortex Flowmeters from Ahmedabad, Gujarat, India. Vortex Flowmeter is based on Karman principle. Flow transmitter is composed of a body with the same nominal diameter and a column with triangular transect. When a column object placed in flowing fluids ( including gas and liquid ) in pipe, a series of vortexes will be generated alternately on each side of the object as shown below ( figure 1 ). Figure 1 The principle of operation of vortex flowmeter. The frequency of the vortex shedding is proportional to the velocity, and inverse proportional to the width of column.
f=StV/d (1) Where: f-frequency of Karman Vortex shedding V flow rate velocity St Strouhal number D width of column object From the expressions (1), by measuring frequency of Karman Vortex shedding can get velocity and instantaneousness. By testing, get the Strouhal number St. From frequency f of Karman Vortex shedding, know the velocity, and then get volume flow-rate. Output pulse number in period of time separate volume of fluid (corresponding shift pulses of fluid in unit volume), we call the coefficient of instrument K, which expression is.