Turbine flowmeter is a kind of velocity type flow measurement instrument based on the kinetic energy of fluid driving impeller rotation, its working principle is to convert the flow rate value by detecting the linear relationship between the impeller rotational speed and the fluid flow rate. The following are the main features and classifications:

1. Working principle

1. Fluid drive: When the fluid flows through the straight pipe, it drives the turbine blades to rotate, and the flow rate is proportional to the impeller speed.

2. Signal conversion: When the impeller rotates, it cuts the magnetic lines of force, and the magnetoelectric induction device (such as the Hall sensor) converts the mechanical rotation into an electrical pulse signal.

3. Flow calculation: The pulse frequency corresponds to the speed, and the instantaneous volume flow rate and the cumulative total are calculated in combination with the cross-sectional area of the pipe.

2. Technical features

- High precision: ±0.2%~±1% repeatability error, the preferred instrument for trade settlement.

- Wide range ratio: up to 1:20 (large diameter) or 1:10 (small diameter).

- Low maintenance: compact structure, high pressure resistant design (up to 6.3MPa), suitable for high temperature/low temperature environment.

- Signal output: The pulse frequency signal has strong anti-interference, supports digital transmission and computer integration.

- Limitations: Requires clean fluid (to prevent impeller jamming), sensitive to viscosity, and requires straight pipe section for installation.

3.Main categories

4. Application areas

- Energy trade: Natural gas trade settlement (one of the legal instruments in Europe and the United States).

- Industrial process: petrochemical process monitoring, clean fluid metering in the pharmaceutical industry.

- Public utilities: tap water flow monitoring, gas transmission and distribution network.

Tips: The selection needs to consider the cleanliness, viscosity and installation conditions of the medium. High viscosity fluids or impurity-containing media may cause measurement deviations or impeller wear.