Advantages and disadvantages of vortex flowmeter

advantage:
Suitable for gas, steam and liquid applications.
Insensitive to fluid conductivity.
Its pressure drop is usually lower than that of an orifice flow meter.
It is generally much less expensive than an orifice flow meter for pipes smaller than 6 inches because it does not require impulse lines and does not require any overhanging of existing pipes
special frost protection.
shortcoming:
Vortex flow meters require turbulent flow to operate and will stop reading as the fluid transitions from a turbulent state to a transitional or laminar state. This is called a meter
The "low flow cut-off" point below which flow measurement is not possible.
(See more information below.)
Vortex flowmeters are effective (if unintended) start-up filters. Eddy shedding rod (bluff body) on meter is great for catching bolts, drinks
Jars, oyster shells and various other sundries. When the substance is caught by the body, the meter either reads inaccurately or does not read at all.
Some vortex flowmeters use small ports to measure vortex currents. These can become clogged with polymers or solids, preventing the meter from functioning properly. vortex
The design of the measurement sensor is the main difference between the meters, the sensor design will allow some meters to work in certain applications and others not.
High vibration or entrained solids can be a problem for vortex flowmeters, which can detect and count solid particles or vibrations as if they were
In fact, it is the same as flowing. (Note, most meters have a "noise band" or similar adjustment that can be set to dampen these vibrations, but this
Will reduce the sensitivity of the meter and significantly increase the low flow cut-off point. )
Like orifice flow meters, vortex flow meters require upstream and downstream flow meters to establish a good flow profile. This run should have no less than 15 upstreams
diameter and 5 downstream diameters, but most suppliers want to see at least 25 upstream diameters and 10 downstream diameters.
Vortex flowmeters measure volumetric flow, not mass flow. It can calculate mass flow based on the assumed density, but if the fluid density
If there is a change, the reading will be wrong.
Beyond a 6-inch line, the economic advantage of the vortex flowmeter diminishes.