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Sewage specific electromagnetic flowmeter
ZK-LDE intelligent electromagnetic flowmeter is an induction instrument that measures the volume flow rate of conductive medium inside the tube based
Product details
ZK-LDE sewage specific electromagnetic flowmeter is a versatile intelligent flowmeter developed by our company using the most advanced technology at home and abroad. It has significant differences from old-fashioned analog or non intelligent electromagnetic flowmeters, especially in terms of measurement accuracy, reliability, stability, functional use, and service life.
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ZK-LDE sewage specific electromagnetic flowmeter is a high-precision, highly reliable, and long-lasting flow instrument. Therefore, we pay great attention to every aspect of the design process, including product structure, material selection, process formulation, production assembly, and factory testing. We have also independently designed the most advanced production equipment and flow calibration device for electromagnetic flowmeters in China, which can effectively ensure the long-term high quality of the product in both software and hardware.
The ZK-LDE sewage specific electromagnetic flowmeter is specially designed with a backlit wide temperature Chinese LCD display, which is fully functional, practical, intuitive to display, and easy to operate, reducing the inconvenience caused by the English menu of other electromagnetic flowmeters. In addition, we exclusively design 4-6 multi electrode structures to further ensure measurement accuracy and eliminate the need for grounding rings at all times, reducing the size of the instrument and the hassle of installation and maintenance.
Intelligent electromagnetic flowmeterPerformance characteristics:
The measurement accuracy is not affected by changes in fluid density, viscosity, temperature, pressure, and conductivity. The sensor's induced voltage signal is linearly related to the average flow rate, resulting in high measurement accuracy.
There is no obstruction in the measuring pipeline, so there is no additional pressure loss; There are no movable parts inside the measuring pipeline, so the sensor has an extremely long lifespan.
Due to the fact that the induced voltage signal is formed in the entire space filled with a magnetic field and is the average value on the surface of the pipeline, the straight pipe section required for the sensor is relatively short, with a length of 5 times the diameter of the pipeline.
The sensor part only has the inner lining and electrodes in contact with the measured liquid. As long as the electrode and inner lining materials are selected reasonably, they can be corrosion-resistant and wear-resistant.
The LDE converter adopts the latest and most advanced international microcontroller (MCU) and surface mount technology (SMT), with reliable performance, high accuracy, low power consumption, stable zero point, and convenient parameter setting. Click on the Chinese display LCD to show cumulative flow, instantaneous flow, flow rate, flow percentage, etc.
A bidirectional measurement system that can measure both forward and reverse flow rates. Using special production processes and high-quality materials to ensure the stability of product performance over a long period of time.
Intelligent electromagnetic flowmeterMeasurement principle:
The measurement principle of ZK-LDE intelligent electromagnetic flowmeter is based on Faraday's law of electromagnetic induction: when a conductive liquid cuts magnetic field lines in a magnetic field, an induced potential is generated in the conductor, and the induced potential E is:
E=KBVD
In the formula: K - instrument constant
B -- Magnetic induction intensity
V -- Measure the average flow velocity within the cross-section of the pipeline
D -- Measure the inner diameter of the pipeline cross-section
When measuring flow rate, a conductive liquid flows through a magnetic field perpendicular to the flow direction at a velocity of V. The flow of the conductive liquid induces a voltage proportional to the average flow velocity, and the induced voltage signal is picked up by two or more electrodes in direct contact with the liquid and sent to a converter through a cable for intelligent processing. Then, it is displayed on an LCD or converted into standard signals of 4-20mA and 0-1kHz for output.
How to choose correctly:
The selection of instruments is a very important task in instrument applications. Relevant data shows that 2/3 of instrument failures in practical applications are caused by incorrect selection or installation of instruments. Please pay special attention.
◆collect data
1. Composition of the tested fluid
2. Maximum and minimum flow rates
3. Maximum work pressure
4. Maximum and minimum temperatures
◆The tested fluid must have a certain degree of conductivity, with a conductivity>5 μ S/CM
The maximum and minimum flow rates must comply with the numbers in the following table
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Caliber mm
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Flow range m3/h
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Caliber mm
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Flow range m3/h
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φ15
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0.0636~6.36
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φ450
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57.23～5722.65
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φ20
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0.11～11.30
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φ500
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70.65～7065.00
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φ25
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0.18～17.66
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φ600
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101.74～10173.6
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φ40
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0.45～45.22
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φ700
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138.47～13847.4
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φ50
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0.71～70.65
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φ800
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180.86～18086.4
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φ65
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1.19～119.4
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φ900
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228.91～22890.6
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φ80
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1.81～180.86
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φ1000
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406.94～40694.4
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φ100
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2.83～282.60
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φ1200
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553.90～55389.6
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φ150
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6.36～635.85
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φ1600
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723.46～72345.6
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φ200
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11.3～1130.4
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φ1800
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915.62～91562.4
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φ250
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17.66～176.25.
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φ2000
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1130.4～113040.00
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φ300
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25.43～2543.40
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φ2200
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1367.78～136778.4
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φ350
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34.62～3461.85
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φ2400
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1627.78～162777.6
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φ400
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45.22～4521.6
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φ2600
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1910.38～191037.6
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The actual maximum working pressure must be less than the rated working pressure of the flowmeter.
The maximum working temperature and minimum temperature must meet the temperature requirements specified by the flowmeter.
◆ Determine if there is negative pressure present.
You can choose the corresponding electromagnetic flowmeter based on the flow rate in the table above. If the inner diameter of the selected electromagnetic flowmeter does not match the inner diameter of the current process pipeline, it should be shrunk or expanded.
If the pipeline undergoes shrinkage, consideration should be given to whether the pressure loss caused by shrinkage will affect the process flow.
From the perspective of product price, smaller caliber electromagnetic flow meters can be chosen to relatively reduce investment.
When measuring clean water, the economic flow rate is 1.5-3m/s. When measuring solutions that are prone to crystallization, the flow rate should be appropriately increased to 3-4m/s to achieve self-cleaning and prevent adhesion and sedimentation; When measuring abrasive fluids such as slurry, the flow rate should be appropriately reduced to 1.0-2m/s to reduce wear on the lining and electrode. Actual applications rarely exceed 7m/s, and exceeding 10m/s is even rarer.
Intelligent electromagnetic flowmeter typetable
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model
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caliber
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ZK-LDE
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15~2600
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code
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Electrode material
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K1
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316L
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K2
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HB
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K3
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HC
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K4
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titanium
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K5
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tantalum
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K6
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platinum alloy
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K7
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Stainless steel coated with tungsten carbide
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code
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Lining material
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C1
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Polytetrafluoroethylene (F4)
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C2
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Perfluoroethylene propylene (F46)
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C3
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Polyfluoroethylene (FS)
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C4
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Polyvinyl rubber
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C5
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polyurethane rubber
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code
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function
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E1
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Level 0.3
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E2
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Level 0.5
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E3
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Level 1
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F1
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4－20Madc, Load ≤ 750 Ω
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F2
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0-3kHz, 5V active, variable pulse width, output high-end effective frequency
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F3
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RS485 interface
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T1
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Normal temperature type
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T2
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High temperature type
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T3
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Ultra high temperature type
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P1
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1．0MPa
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P2
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1．6MPa
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P3
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4．0MPa
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P4
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16MPa
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D1
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220VAC±10％
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D2
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24VDC±10％
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J1
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Integrated structure
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J2
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Split type structure
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J3
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Explosion proof integrated structure
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