Vortex flowmeter

详情

Vortex flowmeters are popular in steam measuring. Vortex flow meters are flow sensors that detect the frequency of vortices shed by a bluff body placed in a flow stream. The frequency of the vortices is proportional to the flow velocity. Vortex flow meters are used to measure the flow of liquids and/or gases. Some devices can accommodate mixed-phase materials such as steam. Others can measure liquids with suspended solids (slurries). Operating pressure range and media temperature range are important media specifications to consider. Operating pressure range is the maximum head pressure of the process media that devices can withstand. Maximum temperature range is the maximum temperature of the media that can be monitored. Additional parameters include velocity flow rate, which is usually measured in distance/time. Vortex flow meters that can also measure temperature, density or media levels are commonly available. Vortex flow meters provide a variety of features. Multi-insertion devices determine the flow rate by taking flow rate measurements across several points in the flow path. Programmable flow meters typically include a built-in microprocessor and can be adjusted electronically for different materials, ranges, and outputs. Devices with recorder or totalizer functions can plot or chart flow history for a given unit of time. Some vortex flow meters include built in audible or visual alarms and not just alarm contacts. Others provide controller functions. Products that are rated for sanitary applications are suitable for medical or food processing applications. - Stable long term accuracy and repeatability - Digital measuring principle (orifice meters use analog) - Linear transfer (non-square root) - Lower cost of installation than traditional orifice-type meters - No impulse line system - Reduced possibility of process fluid leakage - No moving parts to wear - No special protection needed against extreme weather conditions