Description
Clean Water turbine flow meter is a kind of liquid precision flow measurement instrument and volume sensing device and has a relatively simple working principle.When liquid flows through the casing of sensor, the impulse of fluid will provide the blade with a rotation moment as there is an angle between the blade of impeller and the flow direction. The blade will rotate as the friction moment and the fluid resistance are overcome and it will reach a stable speed when the moments are at balance. Under certain conditions, the rotation speed of blade will be in direct proportion to the flow velocity. Due to the magnetic conductivity of blade, when located in the magnetic field generated by signal detector (made of permanent magnet steel and coils), the rotating blade will cut the magnetic lines and periodically change the flux through the coil, thereby inducing electrical impulse signals at both ends of the coil. The induced signals, after amplified and rectified by amplifier, will form a continuous rectangular impulse wave with certain amplitude which may be remotely transmitted to display instrument indicating the instant flow and the cumulative flow of fluid. Within a certain range of flow, the impulse frequency f is in direct proportion to the instant flow of fluid flowing through the sensor, which is shown in the equation below:
Wherein:
f- Impulse frequency [Hz];
k- Instrument factor of sensor [1/m3], which is given by checklist. If [1/L] is used as the unit, the equation will be:
Q- Instant flow of liquid (in operation) [m3/h];
3600- Conversion factor.
Instrument factor of each sensor will be filled out in verification certificate by the manufacturer. The instant flow and cumulative flow will be displayed when the value of k is loaded into associated display instrument.
Outstanding features
•Low cost.
•Outstanding accuracy.
•Linearity +/-.5%
•Repeatability +/-.1%
•Measurement of non-conductive liquids.
•Capability of heating measuring device. •Suitable for very low flow rates.
Depending on different application, there are several types of turbine flow meters to choose from. And after understanding the application several factors come into effect when choosing a flow meter, such as:
•Fluid Type
•Viscosity
•Connection
•Pipe Sizing
•Process Temperature (min & max)
•Flow Range (min & max)
•Pressure Range (min & max)
•Accuracy Range
•Specific Application
Installation Notice:
The turbine flowmeter / Turbine flow sensor has various connections types for the user’s convenience, such as thread, flange, wafer, tri-clamp, etc. The flow direction could be left-right, right-left, bottom-top, etc, if meet the below straight pipeline length:
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