AVS100 series vortex flow sensorDetailed product description：

Working principle of AVS100 series vortex flow sensor
When a cylindrical object is vertically inserted into the measuring tube, the fluid alternately generates regular vortices on both sides of the object (as shown in the figure on the right), which are called Karman vortex streets. The release frequency of the Karman vortex street is related to the flow velocity of the fluid and the width of the column, and can be expressed by the following equation:
F=St · V/d
Where:
F - Release frequency of Karman vortex street
St ---------- coefficient (known as Strouhal number)
V - Flow rate
The width of the columnar object.
The release frequency F of the Karman vortex street is directly proportional to the flow velocity V, so the instantaneous flow rate can be calculated by measuring the release frequency of the Karman vortex street. Strouhal number is an important coefficient of vortex flowmeter. In the flat part of the curve where St ≈ 0.17, the release frequency of the vortex is proportional to the flow velocity, so the detection frequency F can be used to obtain the flow velocity V, and the volume flow rate can be calculated from V.

The release frequency of the vortex in the AVS100 series vortex flow sensor is detected by the piezoelectric element inside the sensor (probe) through the stress alternately applied by vortices to the detection sensor (probe).

·The structure is simple and sturdy, with no movable parts, high reliability, and very reliable for long-term operation.
·Easy to install and very convenient to maintain.
·The detection sensor does not directly contact the measured medium, with stable performance and long lifespan.
·The output is a pulse signal proportional to the flow rate, with no zero drift and high accuracy.
·The measurement range is wide, and the range ratio can reach 1:10 to 1:30.
·Less pressure loss, lower operating costs, and more energy-saving significance.
·Within a certain Reynolds number range, the output signal frequency is not affected by changes in fluid physical properties and composition
The instrument coefficient is only related to the shape and size of the vortex generator, and is not applicable when measuring fluid volume flow rate
Compensation is required, and after replacing the accessories, there is generally no need to recalibrate the instrument coefficients.
·Widely applicable, the flow rates of steam, gas, and liquid can be measured.
Standards and verification regulations
Manufacturing standard: JB/T9249-1999 Vortex Flow Sensor
Verification regulation: JJB198-94 Speed flowmeter detection regulation
Cast iron material standards are in accordance with national standards (GB), American standards (ASTM), Japanese standards (JIS), and German standards (DIN)