Product brief

The LWGY series turbine flow sensor (hereinafter referred to as the sensor) is based on the principle of torque balance and belongs to the speed type flow instrument. Sensors have the characteristics of simple structure, lightweight, high accuracy, good reproducibility, sensitive response, and easy installation, maintenance, and use. They are widely used in industries such as petroleum, chemical, metallurgy, water supply and papermaking, and are ideal instruments for flow measurement and energy conservation.

Sensors and display instruments are used in conjunction, suitable for measuring liquids in closed pipelines that do not corrode stainless steel 1Cr18Ni9Ti, 2Cr13, corundum Al2O3, hard alloys, and have no impurities such as fibers or particles. If matched with display instruments with special functions, quantitative control, over limit alarm, etc. can also be performed.

Working principle

The fluid flows through the sensor housing, and due to the angle between the blades of the impeller and the flow direction, the impulse of the fluid causes the blades to have a rotational torque. After overcoming the friction torque and fluid resistance, the blades rotate, and the rotational speed stabilizes under the condition of torque balance. Under this condition, the rotational speed is proportional to the flow velocity. Due to the magnetic conductivity of the blades, they are in the magnetic field of the signal detector (composed of magnetic steel and coils). The rotating blades cut the magnetic field lines and periodically change the magnetic flux of the coil, causing electrical pulse signals to be induced at both ends of the coil. This signal is amplified and shaped by an amplifier, forming a continuous rectangular pulse wave with a fixed amplitude, which can be transmitted to a display instrument to display the instantaneous flow rate or total amount of the fluid. Within the flow range of, the pulse frequency f is proportional to the instantaneous flow rate Q of the fluid flowing through the sensor, and the flow equation is:

Q=3600×f÷k

In the formula:

F-pulse frequency [Hz]

The instrument coefficient of the k-sensor [1/m3] is given by the calibration sheet.

Instantaneous flow rate of Q-fluid (working state) [m3/h]

3600 conversion factor

Product Features

1. High accuracy, generally up to ± 1% R and ± 0.5% R;

2. Good repeatability, short-term repeatability can reach 0.05% to 0.2%, and accuracy can be achieved through regular calibration or online calibration. Flow meters are preferred for trade settlement;

3. The on-site display adopts a Chinese operation interface, which is simple and easy to understand, and can also be used as an external one click reset type;

4. The liquid turbine flowmeter has a wide range, which can reach 10:1;

5. Compact and lightweight structure, easy installation and maintenance, and high circulation capacity;

6. Suitable for high voltage measurement, there is no need to open holes on the instrument body, making it easy to make high voltage instruments;

The 7-liquid turbine flowmeter can be made into an insert type, suitable for large-diameter measurement, with low pressure loss, low price, can be removed without interruption, and easy installation and maintenance.

detailed parameters

Product images
Instrument model	XNLWGY-N	XNLWGY-A	XNLWGY-B	XNLWGY-C
signal output	pulse	4-20mA	not have	4-20mA/pulse
Power supply	+24VDC±15%	24VDC±15%	lithium battery	24VDC±15%
display type	Signal remote transmission requires the configuration of display instruments	No on-site display, output 4-20mA standard current signal	Double row LCD meter head, on-site display of instantaneous and cumulative flow in Chinese
accuracy class	1.0~0.5 level	1.0~0.5 level	1.0~0.5 level
measuring range	Standard range	Standard range	Standard range
monitor	not have	not have	have
communication interface	not have	not have	Optional RS485
Instrument material	stainless steel	stainless steel	stainless steel
Explosion proof grade	not have	Ex d II CT6 Gb	Ex d II CT6 Gb
protection grade	IP60	IP65	IP65
Overall Power Consumption	＜1W	＜1W	＜1W
Instrument communication	DN4~DN250	DN4~DN250	DN4~DN250
medium temperature	-20℃~120℃	-20℃~120℃	-20℃~120℃
ambient temperature	-30℃~60℃	-30℃~60℃	-30℃~60℃

measuring range