Working principle 2:
The basic principle of temperature pressure compensation vortex flowmeter is the Karman vortex principle, which states that "the vortex separation frequency is proportional to the flow velocity". The diameter of the flowmeter flow body and the instrument

The nominal caliber is basically the same. As shown in Figure * * *, there is an approximately isosceles triangular cylinder inserted into the flow body, and the axis of the cylinder is perpendicular to the flow direction of the measured medium,

The bottom faces the fluid, and when the measured medium flows through the column, vortices alternate on both sides of the column. The vortices continue to generate and separate, forming a staggered arrangement downstream of the column

Two rows of vortices, known as the 'vortex street'. Theoretical analysis and experiments have shown that the frequency of vortex separation is directly proportional to the flow velocity of the column side medium.In the formula f=(sr * V)/d:

F - frequency of vortex separation on the cylinder side (Hz); V - Column side flow velocity (m/s); D - width of the upstream face of the column (m);

Sr - Strouhal number. It is a constant that depends on the cross-sectional shape of the cylinder and is essentially independent of fluid properties and flow velocity.

Three product features:
1. The sensor measuring probe is packaged with special technology and can withstand high temperatures up to 350 ℃
2. The sensitive element is sealed inside the probe body, and the detection element does not come into contact with the measuring medium, resulting in a long service life
3. The sensor adopts compensation design to improve the seismic resistance of the instrument
4. Simple structure, no moving parts, durability***
5. Within the specified Reynolds number range, the measurement is not affected by the temperature, pressure, or viscosity of the medium
6. The flowmeter can be applied in explosion-proof situations with good safety
7. Wide range ratio, up to 10:1 15:1
8. Strong universality, capable of measuring unclean gases and liquids
Four technical parameters:
1. Environmental temperature: (-40～55)℃ ;
2. Relative humidity: (5～90)% ;
3. Atmospheric pressure: (86—106)Kpa
4. nominal diameter: (15-1500) mm (insert structure if larger than 200mm);
5. Measurement medium: liquid, gas, steam;
6. Nominal pressure: 1.6Mpa 2.5Mpa 4.0Mpa
7. Medium temperature: (-40～+350)℃;
8. Accuracy level: 0.5***,1.0***1.5***,2.5***;
9. Linearity: ≤ ±1.5％;
10. Repeatability: ≤ 0.5％,≤ 1.0% ;
11. Output signal: high voltage impulse;
12.(4~20) mA DC (two-wire system);;
13. Power supply: High impulse voltage 12V DC or 24V DC;
14. Body material: 304 stainless steel
15. Connection method: (15-300) mm flange clamp type structure or flange connection type structure; (200-1500) mm is an insertable structure;
16. Protection level: IP65, IP67 ; Cable interface: PG10 explosion-proof type: intrinsic safety type; Explosion proof mark: iaⅡCT6; dIIBT4
Temperature pressure compensation vortex flowmeterProduct selection: