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Gas Turbine Flowmeter

2022-04-13
 How Gas Turbine Flowmeter Work
Gas intelligent turbine flowmeters use turbines for measurement. 
It first converts the flow rate into the rotational speed of the turbine, and then converts the rotational speed into an electrical 
signal proportional to the flow rate. This flow meter is used to detect instantaneous flow and total accumulated flow,
Its output signal is frequency, which is easy to digitize. The induction coil is fixed to the housing together with the permanent magnet. 
When the ferromagnetic turbine blade passes the magnet, the reluctance of the magnetic circuit changes, thereby generating an induced signal.
 
The signal is amplified and shaped by the amplifier and sent to the counter or frequency meter to display the total accumulated flow.
 At the same time, the pulse frequency is converted from frequency to voltage to indicate the instantaneous flow. The speed of the impeller 
is proportional to the flow,
The number of revolutions of the impeller is proportional to the total flow. The output of the turbine flowmeter 
is a frequency modulated signal, which not only improves the anti-interference of the detection circuit, but also simplifies the flow detection
 system.
Its turndown ratio can reach 10:1, and the accuracy is within ±0.2%. Turbine flowmeters with low inertia and small size have time 
constants of up to 0.01 seconds.​​
Gas turbine flowmeters are widely used in petroleum, organic liquids, inorganic liquids, liquefied gas, 
natural gas and cryogenic fluids.


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