Flow meter

Working principle text

XGHLUGB type vortex flow sensor measures the flow of steam, gas and low-viscosity liquid based on the theory of Karman and Strohal on the generation of vortex and the relationship between vortex and flow. As shown in Figure 1, a triangle or vortex generator is vertically inserted into the surface body. When a medium flows through the surface body, Karman vortices with opposite directions and regularity are alternately generated behind the triangle column. The separation frequency of the vortex is F. It is proportional to the flow velocity V of the medium. By detecting the number of vortices by the sensor head, the fluid velocity can be measured, and then the volume flow of the measured medium can be calculated according to the diameter of the meter body.

◎Technical indicators:

1. Accuracy level: liquid level 1.0, gas level 1.5

2. Nominal pressure: 1.6MPa, 2.5MPa, 4.0MPa and above 3. Measured medium temperature: -40℃~350℃

4. Pressure loss: resistance coefficient cd≤2.4

5. Power supply: 12~24VDC external power supply or 3.6V lithium battery 6. Explosion-proof level: laiiCT6 (intrinsically safe explosion-proof)

7. Output signal: pulse signal, 4~20mA current signal