LWGB turbine flow transmitter-Global supplier

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No. 158, Minqiao Industrial Concentration Zone, Jinhu, Jiangsu

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LWGB turbine flow transmitter

Features: Liquid Form: Integrated/Split Power Supply: DC24V Output: 4-20mA Model: LWGB Series Temperature: -20~120 ℃ Pressure: 0~32Mpa

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LWGB type turbine flow transmitter

　 Turbine flow transmitterIt does not have on-site display function and only transmits the flow signal in the form of a two-wire 4-20mA current for remote output. The external power supply is+24VDC, and the remote transmission distance is500m.

The reason for using current signals is that they are less susceptible to interference. And the internal resistance of the current source is infinite, and the series connection of wire resistance in the circuit does not affect accuracy. It can transmit hundreds of meters on ordinary twisted pair cables. The upper limit of 20mA is set due to explosion-proof requirements: the spark energy caused by the current interruption of 20mA is insufficient to ignite gas. The reason why the lower limit is not set to 0mA is to detect wire breakage: during normal operation, it will not be lower than 4mA. When the transmission line breaks due to a fault, the loop current drops to 0. Usually take 2mA as the disconnection alarm value.

The current output type transmitter converts physical quantities into 4-20mA current output, which requires an external power supply for power supply. The most typical example is that a transmitter requires two power lines and two current output lines, totaling four wires, which is called a four wire transmitter.

Of course, the current output can share one line with the power supply (VCC or GND), which can save one line and is called a three wire transmitter.

In fact, 4-20mA current itself can supply power to the transmitter. The transmitter is equivalent to a special load in the circuit, and its special feature is that the power consumption current of the transmitter varies between 4~20mA according to the sensor output. The display instrument only needs to be connected in series in the circuit. This type of transmitter only requires 2 external wires, hence it is called a two-wire transmitter.

In industrial applications, measurement points are generally located on site, while display or control devices are typically located in control rooms or cabinets. The distance between the two may be tens to hundreds of meters. Calculating based on a distance of 100 meters, eliminating 2 signal transmission wires means a cost reduction of nearly 100 yuan! In addition, four wire and three wire transmitters require expensive shielded wires due to asymmetric current in the wires, while two-wire transmitters can use very cheap twisted pair wires. Therefore, two-wire transmitters are inevitably the preferred choice in applications.

Basic parameters and technical performance：

Instrument caliber and connection method	4. 6, 10, 15, 20, 25, 32, 40 are connected by threads (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
Instrument material	304 stainless steel, 316 (L) stainless steel, etc
Temperature of the tested medium (℃)	-20～＋120℃
environmental condition	Temperature -10~+55 ℃, relative humidity 5%~90%, atmospheric pressure 86~106Kpa
output signal	Sensor: Pulse frequency signal, low level ≤ 0.8V, high level ≥ 8V Transmitter: two-wire 4-20mADC current signal
power supply	Sensor:+12VDC,+24VDC (optional) Transmitter:+24VDC On site display type: The instrument comes with a 3.2V lithium battery
Signal transmission line	STVPV3 × 0.3 (three wire system), 2 × 0.3 (two wire system)
Distance	≤1000m
Signal line interface	Basic type: Hausman connector, explosion-proof type: internal thread M20 × 1.5
Explosion proof grade	Basic Type: Non Explosion proof Product, Explosion proof Type: ExdIIBT6
protection grade	IP65

Measurement range and work pressure

Instrument caliber （mm）	Normal flow range （m3/h）	Expand traffic range （m3/h）	Default installation method and voltage rating	Optional installation methods and default voltage rating	Specially designed pressure resistance level （MPa）
DN4	0.04～0.25	0.04～0.4	Threaded installation, 6.3Mpa	Flange installation, 2.5MPa	12. 16, 25
DN6	0.1～0.6	0.06～0.6	Threaded installation, 6.3Mpa	Flange installation, 2.5MPa	12. 16, 25
DN10	0.2～1.2	0.15～1.5	Threaded installation, 6.3Mpa	Flange installation, 2.5MPa	12. 16, 25
DN15	0.6～6	0.4～8	Threaded installation, 6.3Mpa	Flange installation, 2.5MPa	4.0, 6.3, 12, 16, 25
DN20	0.8～8	0.45～9	Threaded installation, 6.3Mpa	Flange installation, 2.5MPa	4.0, 6.3, 12, 16, 25
DN25	1~10	0.5～10	Threaded installation, 6.3Mpa	Flange installation, 2.5MPa	4.0, 6.3, 12, 16, 25
DN32	1.5～15	0.8～15	Threaded installation, 6.3Mpa	Flange installation, 2.5MPa	4.0, 6.3, 12, 16, 25
DN40	2~20	1~20	Threaded installation, 6.3Mpa	Flange installation, 2.5MPa	4.0, 6.3, 12, 16, 25
DN50	4~40	2~40	Flange installation, 2.5Mpa	Threaded connection, 6.3MPa	4.0, 6.3, 12, 16, 25
DN65	7~70	4~70	Flange installation, 1.6Mpa	Threaded connection, 6.3MPa	4.0, 6.3, 12, 16, 25
DN80	10~100	5~100	Flange installation, 1.6Mpa	Threaded connection, 6.3MPa	4.0, 6.3, 12, 16, 25
DN100	20~200	10~200	Flange installation, 1.6Mpa		4.0, 6.3, 12, 16, 25
DN125	25~250	13~250	Flange installation, 1.6Mpa		2.5, 4.0, 6.3, 12, 16
DN150	30~300	15~300	Flange installation, 1.6Mpa		2.5, 4.0, 6.3, 12, 16
DN200	80~800	40~800	Flange installation, 1.6Mpa		2.5, 4.0, 6.3, 12, 16

Model and specification description:

model								describe
LWGY								Basic type, powered by+5-24DCV, without on-site display
LWGB								4-20mA two-wire current output, without on-site display
LWY								Battery powered on-site display type
LWYC								On site display/4~20mA two-wire current output
state-owned call open up or clear out by poking or jabbing footpath	4							4mm， The standard range is 0.04-0.25m3/h, and the wide range is 0.04-0.4m3/h
	6							6mm， The standard range is 0.1-0.6m3/h, and the width measuring wheel is 0.06-0.6m3/h
	10							10mm， The standard range is 0.2-1.2m3/h, and the wide range is 0.15-1.5m3/h
	15							15mm， The standard range is 0.6-6m3/h, and the wide range is 0.4-8m3/h
	20							20mm， The standard range is 0.8-8m3/h, and the wide range is 0.4-8m3/h
	25							25mm， The standard range is 1-10m3/h, and the wide range is 0.5-10m3/h
	32							32mm， The standard range is 1.5-15m3/h, and the wide range is 0.8-15m3/h
	40							40mm， The standard range is 2-20m3/h, and the wide range is 1-20m3/h
	50							50mm， The standard range is 4-40m3/h, and the wide range is 2-40m3/h
	65							65mm， The standard range is 7-70m3/h, and the wide range is 4-70m3/h
	80							80mm， The standard range is 10-100m3/h, and the wide range is 5-100m3/h
	100							100mm， The standard range is 20-200m3/h, and the wide range is 10-200m3/h
	125							125mm， The standard range is 25-250m3/h, and the wide range is 13-250m3/h
	150							150mm， The standard range is 30-300m3/h, and the wide range is 15-300m3/h
	200							200mm， The standard range is 80-800m3/h, and the wide range is 40-800m3/h
communication		C1						On site display/RS485 communication protocol
communication		C2						On site display/ART communication protocol
accuracy class			05					Accuracy level 0.5
accuracy class			10					Accuracy level 1.0
turbine type				W				Wide range turbine
turbine type				S				Standard turbine
material					S			304 stainless steel
					L			316 (L) stainless steel
					P			Rubber and Plastic
explosion-proof								Unmarked, non explosion proof type
explosion-proof						E		Explosion proof type (Exm Ⅱ CT6 or Exd Ⅱ BT6)
pressure rating							N	Conventional (refer to measurement range and working pressure gauge)

Note: DN15 to DN40 are usually threaded connections. If you want to use flange connections, please add "(FL)" after "nominal diameter". For example, if you choose a flange connected explosion-proof turbine flowmeter to measure diesel, the pipeline is DN40, and the current signal needs to be displayed and transmitted remotely on site, with an accuracy of 0.5 level, made of 304 stainless steel material, and the instrument pressure resistance is 16MPa. The measurement range is the standard range, and the product model should be:LWGC-4005S-SEN16

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