Paddle wheel flow sensor is a mechanical flow meter that uses an impeller as a flow sensor component. The impeller-type flow meter is a meter that measures flow according to the principle of fluid momentum moment. Paddle wheel flow meter is also called an impeller flow meter, rotary wheel flow meter, etc. Typical Paddle wheel flow meters are water meters and turbine flow meters. It can be a mechanical transmission output type or an electric pulse output type. It is suitable for the measurement and control of industrial process clean water pipelines or low-concentration acid-base, low-viscosity single-phase fluid non-trade settlement process.
PADDLEWHEEL FLOW SENSOR WORKING PRINCIPLE
The sensor is divided into two parts: the transmitter and the impeller. The impeller is in direct contact with the fluid, and the transmitter is isolated from the fluid. The liquid flow drives the impeller to rotate, and there are four evenly distributed magnetic blades on the impeller. The rotating magnetic blade induction Hall switch generates a frequency signal proportional to the flow rate, and the transmitter converts the frequency signal into a 4-20mA current signal.
Typical Paddle wheel flow meters are water meters and turbine flow meters. The structure can be a mechanical transmission output type or an electric pulse output type.
The five-piece impeller design is in line with the principle of fluid mechanics, and the uniform force angle produces a better dynamic balance, ensuring better linear accuracy and repeatability accuracy.
What are the Paddle wheel flow sensor advantages and disadvantages ?
Paddle wheel flow meter Advantage
*Excellent reproducibility and responsiveness.
*Simple structure and low price.
*Small size, large-capacity measurement is possible.
Paddle wheel flow meter Disadvantage
*Extremely sensitive to foreign objects. (Causing blockage)
*Due to the high-speed rotation of the impeller, regular maintenance is required to cope with axial wear or to replace the impeller.
What material are the Paddle wheel flow sensor consist of?
Paddle wheel flow meter Various shafts and bearings:
Shaft and bearing: ZrO2, SS316L, Hastelloy C
Impeller material: PTFE, PP, PVDF, ABS
Body material: PP plus glass fiber, ABS, CPVC, PTFE, SS316L, brass
PADDLEWHEEL FLOW SWITCH APPLICATION
Application range of impeller flowmeter
*Flow monitoring of industrial water treatment process
*Industrial circulating cooling water and make-up water flow monitoring
*Reclaimed water flow monitoring
*Process flow monitoring after wastewater treatment
*Agricultural irrigation water flow measurement
*Multi-way valve and multi-valve system flow monitoring for softening, filtering, etc.
Paddle wheel flow meter installation
*The straight section behind the flange must meet the measuring distance of the first 10 and the rear 5 times the pipe diameter;
*After reducing the diameter (only allowed to change from large to small, but not allowed to change from small to large), the straight line segment needs to meet the measurement distance of the first 15 and the back 5 times the pipe diameter;
*The straight section behind the first-level equal-diameter elbow needs to meet the measuring distance of the first 20 and 5 times the pipe diameter;
*The straight section behind the two-stage continuous equal-diameter elbow on the same plane must meet the measurement distance of the first 25 and the rear 5 times the pipe diameter;
*The liquid in the tested pipeline must be full of flow, and no gas and liquid can flow at the same time;
*The cost of the body must be consistent with the bayonet (open slot) to ensure the correct installation position;
Where are the corrosion-resistant Paddle wheel flow sensors used?
Paddle wheel flow meter Suitable for highly corrosive fluids, resistant to sulfuric acid, nitric acid, hydrofluoric acid, hydrochloric acid, mixed acid, strong alkali and other places; the overcurrent parts are made of PVDF, PTFE, Hastelloy, titanium alloy and other corrosion-resistant materials; almost no pressure loss, Maintenance-free; the flow velocity range is 0.3-6m/s, and it can measure fluids with a flow velocity greater than 0.3m/s; it is not suitable for media containing particles and fibrous impurities;
※Note: As one of the earliest flow meter manufacturer, SenTec provide a wide variety flow measurement solutions, such as differential pressure flow meters, Calorimetric Flowmeter, liquid flow sensor, Ultrasonic Level Transmitter, mass flow meter, Variable Area Flowmeter or Rotameter, Electromagnetic Flowmeter, Turbine Flowmeter, Vortex Flow Meter, Thermal Flowmeter, Coriolis Flowmeter, Mass Flowmeters, Open Channel Flowmeters etc.
For specific paddle wheel flowmeter price, please contact our sales engineer.
