The flow profile of the flow sensor is similar to the profile of a venturi tube. A set of spiral guide vanes is placed on the inlet side. When the fluid enters the flow sensor, the guide vanes force the fluid to produce a violent vortex flow. When the fluid enters the diffusion section, the vortex flow is affected by the backflow and begins to rotate twice, forming a gyroscopic vortex precession phenomenon. This precession frequency is proportional to the flow rate and is not affected by the physical properties and density of the fluid. The detection element can obtain good linearity within a wide flow range by measuring the secondary rotational precession frequency of the fluid. The signal is amplified, filtered, and shaped by the preamplifier and converted into a pulse signal proportional to the flow rate, and then sent to the microprocessor together with detection signals such as temperature and pressure for integration processing, and finally the measurement is displayed on the LCD screen Results (instantaneous flow, accumulated flow and temperature, pressure data).

Flowmeter structure

The precession vortex flowmeter has a compact structure and is mainly composed of a shell, a vortex generator, a sensor (temperature, pressure, flow), a rectifier, a bracket and a converter .

Using conditions of precession vortex gas flow meter

Ambient temperature: -30℃~+55℃

Relative humidity: 5%~95%

Medium temperature: -30℃~+80℃

Atmospheric pressure: 86kPa~106kPa