A vertical flow restriction, called a 'bluff body,' is fitted inside the vortex meter bore. As flow passes by this bluff body, vortices are generated alternately on each side, similar to the rippling effect of a flag blowing in the breeze. Sensors within the flowmeter body count the vortices as they are generated. Consequently, the number of vortices generated directly relates to the volumetric flow. Additionally, head-mounted electronics convert the signals from the sensors to display instantaneous flow rate and totals.
Vortex technology meters various low viscosity liquids and gases. However, most applications involve steam measurement. Flowquip offers the Endress + Hauser Vortex meter, which can include an integral temperature sensor for measuring the mass flow of dry saturated steam. Furthermore, for superheated steam, a separate pressure transmitter and the Contrec Gas and Steam Flow Computer can measure mass flow.
When selecting a Vortex meter for liquids, ensure the liquid's viscosity is no more than 5 cP. This is because vortices cannot be reliably generated in viscous liquids. Moreover, many alternative flow technologies exist for liquid measurement, so it may be wise to use vortex flow sensors primarily for gases and steam.
Flowquip Vortex Shedding Flowmeters are available for 15mm to 300mm pipelines in flanged or wafer configurations. They offer a wide flow range with no moving parts. Additionally, an integral or remote-mounted LCD indicates flow rate and total, with options for pulse and/or 4-20mA output. Typical flow turndown is 30:1 with measuring errors of 1 to 2%. Hazardous area applications are supported with ATEX Approval as a standard option. Finally, each flowmeter is individually calibrated and shipped with its calibration certificate.
Should you wish to hire a flow meter, this can be done through our sister company Flowhire https://www.flowhire.co.uk/flowmetertypes/vortex-flow-meters/
