Usage of the Serthus Proba flow meter

I also want to know about the question asked by LZ – has anyone used it?

Introduce the flow meters you mentioned at the forum so that everyone can learn from it.

Isn’t this just a venturi flow meter? Is there anything special?

I. Overview: The average velocity tube (Proba tube) flow sensor is a high-precision measuring instrument developed on the basis of the principle of pitot tubes for measuring velocity, by applying aerodynamic principles and supplemented by wind tunnel testing. It is a differential pressure, rate-averaging type flow sensor. Flow rate is expressed as the difference between the average total pressure and the static pressure in the fluid, as measured by sensors (i.e., differential pressure), and it is commonly used to measure the flow rate of liquids, gases, and vapors. II. Features: 1. The measuring profile is designed based on aerodynamic principles, and through special processing techniques, the resulting six-premature gravity forces and vortex shedding are kept to a very low level. 2. The static pressure taken from the side results in a static pressure level located before the point where the six-body structure is separated from the sensor; it represents a completely stable, non-pulsating differential pressure signal. 3. There are no movable parts in its structure, which ensures a long service life for the sensor and guarantees long-term stability as well as no drift in accuracy. 4. High precision (≤1.0%) and good repeatability (≤0.1%). 5. Energy saving: The extremely low pressure loss resulting therefrom leads to a **reduction in energy consumption**. It has the lowest operating costs compared to other flowmeters. The cost of the instrument can be recouped quickly in applications. 6. Dust protection: With the static pressure holes located on both sides of the sensor, it is highly insensitive to foreign objects and dust in the medium, making it an ideal flow sensor. 7. There are many special materials available for average velocity tube sensors, to meet the requirements of corrosive environments, extremely high temperatures, and extremely high pressures. 8. The average velocity tube sensor can operate throughout the year with virtually no maintenance required. 9. It is easy to install and comes at a low cost. III. Applications: The average velocity tube (Proba tube) can be used for measuring the flow rate of gases, liquids, and vapors with different diameters, and it is widely applied in industrial control fields such as petroleum, chemicals, metallurgy, power generation, light industry, and water treatment. IV. Theoretical basis: The differential pressure and flow rate of the Pitot tube flow meter are determined based on the Bernoulli equation and the continuity equation; its calculation methods and formats comply with the ISO-5167 international standard. The simplified formulas are as follows: Qv = α × ε × l × D² × (2△P/ρ)⁰·⁵/₄; Qm = α × ε × l × D² × (2△P/ρ)⁰·⁵/₄. Where: α is the flow coefficient, ε is the expansibility coefficient, D is the inner diameter of the process pipeline, △P is the pressure difference, and ρ is the density under operating conditions.

V. Technical specifications:
1. Nominal pressure: PN ≤ 32 MPa
2. Temperature range: -180°C to 650°C
3. Nominal diameter: DN50 to DN3000
4. Accuracy class: 1.0

VI. Model specifications and descriptions:
Model specifications | Description
--- | ---
LGZPL uniform velocity tube (Proba tube) flow meter | Medium: L for liquids, G for gases, S for steam. Connection types: A for threaded connection, B for flanged connection, C for union connection. Pressure classes: 01 ≤ 1.6 MPa, 03 ≤ 2.5 MPa, 04 ≤ 4.0 MPa, 06 ≤ 6.3 MPa, 10 ≤ 10 MPa, 25 ≤ 25 MPa, 32 ≤ 32 MPa. Diameter options: 50 Φ50 mm, 80 Φ80 mm, 100 Φ100 mm… 3000 Φ3000 mm

It’s the average velocity tube flow meter; you can take a look at the information on the Veritas flow meters available on the market. http://www.shakic.com/cp/product13.htm