Gas turbine flow meter

• Medium: free of impurities, no corrosive gases, natural gas, etc.
• Accuracy: ±1.5%, ±1.0%
• Repeatability: better than 0.1%
• Measuring gauge: DN50-DN300
• Flow range: 6.5-6500 m3/h
• Contents of display information: instantaneous flow, accumulated flow, temperature, pressure, etc.
• Connection type: flange connection
• Power supply: Lithium battery power supply or external 24V DC power supply
• Output: Pulse output, 4-20mA output, RS-485 COMMUNICATION and GPRS wireless remote data transmission
• Advantages: The head can return 270°. High accuracy and wide measurement range. Protection against powerful magnetic interference. It can be used with IC card controller or transmitted remotely, which is convenient for trade settlement.

Operating principle of a gas turbine flow meter

When natural gas flows through the turbine flow sensor, the turbine is forced to rotate by the NG (natural gas) thrust and its speed is proportional to the average flow rate of the natural gas.

The rotation of the turbine periodically changes the magnetic resistance value of the magnetoelectric converter, and the magnetic flux in the detection coil follows it.

Periodic changes occur, generating electrical periodic pulse signals. Within a certain range (Reynolds number), the electrical pulse signal is proportional to the volumetric flow of natural gas flowing through the turbine flow sensor.

Advantage of turbine natural gas flow meter:

• Natural gas turbine flow meter has high accuracy: 1.0~1.5%
• Digital gas turbine flow meter with electronic display, pulse output, frequency output, 4-20mA output
• Natural gas flow transmitter has MODBUS or HART protocol options
• Compact structure and easy to install
• Can be made into high pressure type digital natural gas flow meter
• All gas flow sensor is made of stainless steel

Disadvantages of turbine natural gas flow meter

Periodic testing and calibration are required after the time period for natural gas measurement has been started.

Temperature and pressure correction and compensation are necessary because the density of natural gas has a great influence on the accuracy of the gas turbine flow sensor.

Sufficient straight upstream and downstream piping is required when installing a natural gas turbine flow meter.

The natural gas turbine flow meter is not suitable for pulsating flow and mixed phase measurements.

The built-in natural gas flow meter cannot be manufactured for large gas pipelines.