20mA Pressure Vortex Flowmeter High Measurement Accuracy

High Measurement Accuracy High Reliability 20mA Vortex Flowmeter

Vortex flowmeter is based on the Carmen vortex principle research and production, mainly for industrial pipeline fluid flow measurement, such as gas, liquid, steam and other media. Its characteristics are small pressure loss, a large range, high accuracy, in measuring the volume flow of working conditions almost independent of fluid density, pressure, temperature, viscosity and other parameters. No movable mechanical parts, so high reliability and low maintenance. Instrument parameters can be stable over time. Vortex flow meter adopts piezoelectric stress sensor, which is highly reliable and can work in the operating temperature range of -20℃～+250℃. It has analog standard signal and digital pulse signal output, so it is easy to be used with digital system such as computer, which is an advanced and ideal measuring instrument.

Vortex Flowmeter Working Principle

Vortex flowmeter is designed in the flow field of the vortex generator, detection probe and the corresponding electronic circuitry and other components. When the fluid flows through the vortex generator, it forms two alternating rows of vortices on both sides, this vortex is known as Carmen vortex street. Strohal, based on the theory of Carmen vortex street, proposed that the frequency of Carmen vortex street is proportional to the fluid flow velocity, and gave the relationship between frequency and flow velocity: f = St × V / d

f: vortex frequency (Hz)

v: the average flow velocity on both sides of the vortex generator (m/s )

St: Strohal coefficient (constant)

These alternating vortices form a series of alternating negative pressure, which acts on the detection probe and generates a series of alternating electrical signals, which are converted, shaped and amplified by the preamplifier, and then output a pulse frequency signal or standard signal proportional to the vortex synchronization.

Vortex Flowmeter Technical Parameters

Vortex Flowmeter Design Feature

1. Easy to install simple structure, no moving wear parts.

2. High measurement accuracy, high reliability, no need for on-site debugging.

3. Can transmit the flow signal from a long distance, and can be networked with computer to realize centralized management.

4. The amplifier board adopts unique design and is common for gas and liquid.

5. There are analog standard signal and digital pulse signal output, which can be easily used with digital systems such as computers.

6. Explosion-proof instruments can be used in corresponding explosion-proof places.

7. Customized design and production according to customer requirements.