Electromagnetic water meters

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Electromagnetic Flow Meter

Vortex Flow Meter

Ultrasonic Flow Meter

Turbine Flow Meter

Thermal Mass Flow Meter

Coriolis Mass Flow Meter

Metal Tube Rotameter

Precession Vortex Flowmeter

Ultrasonic Level Meter

Radar Level Meter

Radar-Flowmeter

Oval Gear Flow Meter

Water Quality Analyzer

Throttling Device

Magnetic Level Gauge

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Introduction

Application

Technical Data

Installation

Introduction

Electromagnetic water meter is a kind of instrument for measuring the volume flow of conductive liquid based on Faraday's principle of electromagnetic induction. It has the characteristics of wide range, low initial flow, low pressure loss, real-time measurement, cumulative measurement, bi-direction measurement, etc. It mainly uses DMA zoning, online monitoring, water loss analysis and statistical settlement of water supply mains.

Advantages

1 No blocking parts inside of measuring tube, low pressure loss and low requirements for straight pipeline.
2 Variable diameter design, improve measurement accuracy and sensitivity, reduce excitation power consumption.
3 Select suitable electrodes and liner, with good corrosion resistance and wear resistance.
4 Full electronic design, strong anti-interference ability, reliable measurement, high accuracy, wide flow range.

Application

Electromagnetic water meter is a metering instrument specially designed for the actual requirements of water supply enterprises, specially designed for water industry, which can optimize water supply and ensure accurate water trade measurement and settlement. Practice has proved that electromagnetic water meter is the ideal choice to solve the measurement contradiction of large water users. In addition, electromagnetic water meters are widely used in chemical industry, environmental protection, metallurgy, medicine, paper making, water supply and drainage and other industrial technology and management departments.

City water supply

Farm irrigation

Waste water treatment

Oil industry

Pharmaceuticals industry

Water supply and drainage

Technical Data

Table 1: Flange Magnetic Flow Meter Main Performances Parameters

Size	DN25-DN1000mm
Nominal Pressure	0.6-1.6Mpa(2.5Mpa/4.0Mpa/6.4Mpa...Max 42Mpa)
Accuracy	+/-0.5%(Standard) +/-0.3% or +/-0.2%(Optional)
Liner	PTFE, Neoprene, Hard Rubber, EPDM, FEP, Polyurethane, PFA
Electrode	SUS316L, Hastelloy B, Hastelloy C Titanium, Tantalum, Platinium-iridium
Structure Type	Integral type, remote type, submersible type, ex-proof type
Medium Temperature	-20~+60 degC(Integral type)
Medium Temperature	Remote type(Neoprene,Hard Rubber,Polyurethane,EPDM) -10~+80degC Remote type(PTFE/PFA/FEP) -10~+160degC
Ambient Temperature	-20~+60deg C
Ambient Humidity	5-100%RH(relative humidity)
Measuring Range	Max 15m/s
Conductivity	>5us/cm
Protection Class	IP65(Standard); IP68(Optional for remote type)
Process Connection	Flange (Standard), Wafer, Thread, Tri-clamp etc (Optional)

Output Signal	4-20mA/Pulse
Communication	RS485(Standard), HART(Optional),GPRS/GSM (Optional)
Power Supply	AC220V (can be used for AC85-250V) DC24V (can be used for DC20-36V) DC12V (optional), Battery Powered 3.6V (optional)
Power Consumption	<20W
Alarm	Upper Limit Alarm / Lower Limit Alarm
Self-diagnosis	Empty Pipe Alarm, Exciting Alarm
Explosion Proof	ATEX

Table 2: Measure Range

DN (mm)	(R)Q3/Q1	Flow（m³/h)
DN (mm)	(R)Q3/Q1	Q1	Q2	Q3	Q4
25	400	0.04	0.064	16	20
32	400	0.0625	0.1	25	31.25
40	400	0.1	0.16	40	50
50	400	0.1575	0.252	63	78.75
65	400	0.25	0.4	100	125
80	400	0.4	0.64	160	200
100	400	0.625	1	250	312.5
125	400	1	1.6	400	500
150	400	1.575	2.52	630	787.5
200	400	2.5	4	1000	1250
250	400	3.75	6	1500	1875
300	400	4	6.4	1600	2000
350	400	6.25	10	2500	3125
400	400	10	16	4000	5000
450	400	10	16	4000	5000
500	400	16	25	6300	7875
600	400	25	40	9922	12403
700	400	34.63	55.4	13850	17312.5
800	400	45.23	72.36	18090	22612.5
900	400	57.23	91.56	22890	28612.5
1000	400	70.65	113.04	28260	35325

Table 3: Model Selection Table

QTLD		X	X	X	X	X	X	X	X	X	X
Size	DN25-DN1000
Structure	Compact	C
	Remote	R
R value	R160		1
	R250		2
	R400		3
Sensor Material	Carbon steel			CS
	SS304			4
	SS316			6
Liner	Hard rubber				R
	PTFE (only for R160 and R250)				F
Electrodes	SS316L					1
	Hastelloy C					2
Power Supply	3.6V lithium battery						B1
	3.6V lithium battery + 24 VDC						B2
	3.6V lithium battery + 220 VAC						B3
Protocol	RS485 Modbus-RTU (one enclosure, battery)							1
	RS485 Modbus-RTU (two enclosures, battery + RS485 modular )							2
	GPRS							3
	Pulse							4
	No							5
Flange	DIN PN16								D
	ANSI 150#								A
	JIS 10K								J
	Others								O
Pressure Sensor	No									N
	Yes									P
SIM Card	No										N
	Yes										S

Installation

Installation environment selection
1. Stay away from devices with strong electromagnetic fields. Such as large motor, large transformer, large frequency conversion equipment.
2. The installation site should not have strong vibration, and the ambient temperature does not change much.
3. Convenient for installation and maintenance.

Selection of installation location
1. The flow direction mark on the sensor must be consistent with the flow direction of the measured medium in the pipeline.
2. The installation position must ensure that the measuring tube is always filled with the measured medium.
3. Select the place where the fluid flow pulse is small, that is, it should be far away from the water pump and local resistance parts (valves, elbows, etc.)
4. When measuring the two-phase fluid, choose the place which is not easy to cause phase separation.
5. Avoid installation in the area with negative pressure in the tube.
6. When the measured medium easily causes the electrode and the inner wall of the measuring tube to adhere to and scale, it is recommended that the flow rate in the measuring tube be no less than 2m/s. At this time, a tapered tube slightly smaller than the process tube can be used. In order to clean the electrode and measuring tube without interrupting the flow in the process tube, the sensor can be installed in parallel with a cleaning port.

Upstream straight pipe section requirements
The requirements of the sensor on the upstream straight pipe section are shown in the table. When the diameters of the upstream and downstream straight pipe sections are inconsistent with those of the electromagnetic cold water meter, the tapered pipe or the tapered pipe should be installed, and its conical Angle should be less than 15° (7° -8 ° is preferred) and then connected with the pipe.

Upstream resistance components	Note: L is straight pipe length
Straight pipe requirements	L=0D can be considered as a straight pipe section	L≥5D	L≥10D

Note :(L is the length of straight pipe section, D is the nominal diameter of sensor)