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LWGY liquid turbine flowmeter sensor
LWGY liquid turbine flowmeter sensor
LWGY liquid turbine flowmeter sensor
Overview: LWGY Turbine Flow Sensor and Display Instrument Together Form a Turbine Flow Meter

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◆overview
LWGYThe turbine flow sensor is paired with a display instrument to form a turbine flow meter. Sensors have the characteristics of high accuracy, good repeatability, long lifespan, and simple operation. It can be widely used in industries such as petroleum, chemical, metallurgy, and papermaking to measure the instantaneous flow rate and total volume of liquids. The LWGY series turbine flowmeter is manufactured using advanced foreign technology and is one of the most ideal flowmeters for measuring liquids. It has the characteristics of simple structure, high measurement accuracy, long service life, simple operation, and easy maintenance. This product is widely used in metallurgy, chemical industry, petroleum, urban construction, environmental protection, food and other fields to measure the flow rate of liquids such as water, tap water, diesel, gasoline and light finished oil with high precision.
◆Working principle
The turbine inside the sensor rotates under the action of fluid, causing a change in the magnetic field of the signal detector. Therefore, an alternating voltage is induced in the coil of the signal detector, which is amplified, filtered, and shaped by an amplifier to output a square wave signal. The frequency of this signal voltage is directly proportional to the speed of the impeller, that is, directly proportional to the flow rate (velocity) of the fluid.
◆characteristic
★The pressure loss is small, and the impeller has anti-corrosion function.
★Has high resistance to electromagnetic interference and vibration, reliable performance, and long working life.
★Adopting advanced ultra-low power single-chip microcomputer technology, the whole machine has strong functions, low power consumption, and superior performance. Intelligent flow display with non-linear accuracy compensation function. The accuracy of the correction formula is better than 0.02%.
★The instrument coefficient can be set online through buttons and displayed on an LCD screen, which is intuitive, clear, and highly reliable.
★Using EEPROM for power down protection of accumulated flow and instrument coefficient. The protection period is greater than 10 years.
★The measuring detector has wear-resistant and anti-corrosion types, with a wide range of product applications and good stability.
★Temperature range of turbine flowmeter: -20~100 ℃, high temperature type -20~150 ℃.
★The flow measurement range is large, generally up to 10:1, and can be extended to 40:1 for special cases.
★The flow sensor has multiple connection methods, making it easy to install and use.
★Turbine sensors are suitable for measuring liquids with low viscosity, with high accuracy up to 0.2~1.0 levels, and can withstand high working pressures.
★The impeller is made of duplex stainless steel and requires further preventive treatment. The bearings are made of graphite, modified tetrafluoroethylene, tungsten carbide, and gemstones.
★Intelligent circuit design, powerful functions, displaying instantaneous flow and cumulative flow. Low power consumption, can work with its own battery, remote transmission output 4-20mA, pulse, with Hart protocol.
◆Main technical parameters
★Flow meter specifications, basic parameters, and performance indicators (see Table 2)
Execution standards
Turbine flow sensor (JB/T9246-1999)
Instrument caliber and connection method
4Threaded connections are used for 6, 10, 15, 20, 25, 32, and 40
(15, 20, 25, 32, 40) 50, 65, 80, 100, 125, 150, 200 are connected by flanges
accuracy class
±1%R、 ± 0.5% R, ± 0.2% R (to be customized)
Range ratio
1:10；1:15；1:20
Sensor material
304Stainless steel, 316 (L) stainless steel, etc
Conditions of Use
Medium temperature: -20 ℃~+120 ℃ Environmental temperature:- 20℃～+60℃
Relative humidity: 5%~90% Atmospheric pressure: 86KPa~106KPa
Signal output function
Pulse signal, 4-20mA signal
Communication output function
RS485Communication, HART protocol, etc
Working power supply
A.External power supply:+ 24VDC ± 15%, ripple ≤ ± 5%, suitable for 4-20mA output, pulse output, RS485, etc
B.Internal power supply: 1 set of 3.0V10AH lithium batteries, which can work normally when the battery voltage is between 2.0V and 3.0V.
Signal line interface
Basic type: Hosman connector or built-in three core cable; Explosion proof type: Internal thread M20 × 1.5
Explosion proof grade
Basic type: non explosion proof product; Explosion proof ExdIIBT6 or ExdIICT4
protection grade
IP65Or higher (customizable)
★Accuracy: Level 0.5, Level 1.0;
★usuallyUsage conditions:
1)Environmental temperature -20 ℃~50 ℃;
2)Relative temperature: 5% to 95%;
3)Temperature of the tested medium:- 20℃～120℃;
4)Atmospheric pressure: 86Kpa to 106Kpa;
5)Explosion proof grade: ib Ⅱ BT4
★Signal transmission distance: The distance from the sensor to the display can reach 1000m.
Electrical characteristics
1Display mode:
1)LWGYRemote transmission display: pulse output (equipped with display instrument);
2)LWYOn site display: 7-digit LCD displays cumulative flow, unit (m3)
7-digit LCD displays instantaneous flow rate, unit (m3/h)
3)LWGBTurbine flow transmitter: (equipped with display instrument).
2Output function:
1)LWGYPulse output, p-p value determined by the power supply;
2)LWYCan be equipped with pulse output or 4-20mA two-wire current output;
Turbine FlowmeterComparison Table of Caliber and Flow Range:
Instrument caliber
（mm）
Normal flow range
（m3/h）
Expand traffic range
（m3/h）
Conventional connection method
Compared to the withstand voltage level
Specially designed pressure resistance level (MPa)
(with diameter flange connection method)
DN 4
0.04～0.25
0.04～0.4
Threaded connection/6.3MPa
10、 16. 25
DN 6
0.1～0.6
0.06～0.6
Threaded connection/6.3MPa
10、 16. 25
DN 10
0.2～1.2
0.15～1.5
Threaded connection/6.3MPa
10、 16. 25
DN 15
0.6～6
0.4～8
Threaded connection/6.3MPa
4.0、 6.3, 12, 16, 25
Flange connection
DN 20
0.8～8
0.45～9
Threaded connection/6.3MPa
4.0、 6.3, 12, 16, 25
Flange connection
DN 25
1～10
0.5～10
Threaded connection/6.3MPa
4.0、 6.3, 12, 16, 25
Flange connection/2.5MPa
DN 32
1.5～15
0.8～15
Threaded connection/6.3MPa
4.0、 6.3, 12, 16, 25
Flange connection/2.5MPa
DN 40
2～20
1～20
Threaded connection/6.3MPa
4.0、 6.3, 12, 16, 25
Flange connection/2.5MPa
DN 50
4～40
2～40
Flange connection/2.5MPa
4.0、 6.3, 12, 16, 25
DN 65
7～70
4～70
Flange connection/2.5MPa
4.0、 6.3, 12, 16, 25
DN 80
10～100
5～100
Flange connection/2.5MPa
4.0、 6.3, 12, 16, 25
DN 100
20～200
10～200
Flange connection/2.5MPa
4.0、 6.3, 12, 16, 25
DN 125
25～250
13～250
Flange connection/1.6MPa
2.5、 4.0, 6.3, 12, 16
DN 150
30～300
15～300
Flange connection/1.6MPa
2.5、 4.0, 6.3, 12, 16
DN 200
80～800
40～800
Flange connection/1.6MPa
2.5、 4.0, 6.3, 12, 16
Turbine FlowmeterSelection Table:
Model number
Explanation
LWGY─
□
/□
/□
/□
/□
/□
/□
nominal
orifice
4
4mm
6
6mm
10
10mm
15
15mm
20
20mm
25
25mm
32
32mm
40
40mm
50
50mm
65
65mm
80
80mm
100
100mm
125
125mm
150
150mm
200
200mm
Type
N
Sensor type:+ 12V or 24V power supply, output three wire pulse signal
A
Transmitter type:+ 24V power supply, output two-wire 4-20mA
B
Intelligent type: Powered by lithium batteries, no signal output displayed on site
C
Intelligent type:+ 24V power supply, on-site display and output of two-wire 4-20mA
C1
Intelligent type:+ 24V power supply, on-site display with RS485 communication protocol
C2
Intelligent type:+ 24V power supply, on-site display with HART communication protocol
accuracy class
05
0.5level
10
1.0level
02
0.2Grade (negotiated ordering, longer production cycle)
Turbine
Type
W
Expand measurement range
S
Standard measurement range
texture of material
S
304stainless steel
L
316(L) Stainless steel
Explosion proof
N
Non explosion proof type
E
Explosion proof type, Exd Ⅱ BT6
pressure rating
N
Conventional (refer to Table 2)
H(x)
High voltage (refer to Table 2)
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