| The product can be widely used in various fields such as chemical, steel, coal, mining and metallurgy, petroleum extraction, petrochemicals, papermaking, environmental protection, sugar production, pharmaceuticals, food, water conservancy and irrigation, water supply and drainage, and port dredging. It can accurately measure variousVolume flow rates of conductive fluids and solid-liquid two-phase systems such as acid, alkali, salt solutions, raw water, cooling water, wastewater, coal slurry, ore slurry, mud, cement slurry, pulp, syrup, coal water slurry, corn slurry, fiber slurry, grain slurry, lime milk, hydrogen peroxide, beer, wort, black liquor, green liquid medicine, and various beveragesLT-LDE seriesElectromagnetic FlowmeterThere are two types of combinations: integrated type and separated type,
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LT-LDE type intelligentElectromagnetic FlowmeterIt is a fully intelligent flowmeter developed and researched by our company using the latest advanced technology at home and abroad, which is unparalleled compared to old-fashioned analog or non intelligent electromagnetic flowmeters produced by other manufacturers. Especially in terms of measurement accuracy, reliability, stability, functional use, and service life, it has taken a very big step forwardMeasure highly corrosive liquidsThe preferred instrument and equipment.
Compared to other similar products abroad:
The LT-LDE intelligent electromagnetic flowmeter adopts a backlit wide temperature dot matrix LCD display, all displays are in Chinese, with multiple and practical functions, especially convenient for users to operate, reducing unnecessary trouble and errors.
Fast delivery, low cost, and easy maintenance.
Compared with other similar products in China:
The LT-LDE intelligent electromagnetic flowmeter is designed by our company using the principle of full intelligence. It has significant differences in measurement accuracy, functionality, reliability, and service life compared to the old-fashioned or fake intelligent electromagnetic flowmeters produced by some domestic enterprises.
The service life of electromagnetic flow meters should be over 10-20 years, so we fully consider this when designing. We are very careful in every detail from sensors to converters, from design, material selection, process, production, testing, etc. We pay great attention to every link, and design and customize the most advanced specialized and electromagnetic flow meter production line in China to ensure the long-term quality of our products.
characteristic:
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The measurement of flow rate 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.
2. There is no obstruction in the measuring pipeline, so there is no additional pressure loss, and the measuring pipeline is not easily blocked; There are no movable parts inside the measuring pipeline, so the sensor has an extremely long lifespan.
3. The converter adopts the latest international microcontroller (MCU) and surface mount technology (SMT), with reliable performance, high accuracy, low power consumption, stable zero point, and convenient parameter setting.
4. Dot matrix Chinese display LCD, displaying cumulative flow rate, instantaneous flow rate, flow percentage, etc.
5. The installation of sensors is not limited by the direction of liquid flow, and can achieve bidirectional flow measurement, that is, forward or reverse measurement.
6. The range can be set arbitrarily, and the sensor and converter can be interchanged freely.
7. Easy to install, can be installed horizontally, vertically, or at any angle, with low requirements for upstream straight pipe sections.
8. Easy to use, low maintenance, long service life, low power consumption, capable of outputting standard current and frequency pulses and RS-485 communication.
working principle:
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The measurement principle of LT-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 electric potential is generated in the conductor, and its induced electric heating E is
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E = KBVD
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In the formula:
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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
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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 detected 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.
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Technical parameters:
The instrument ensures that the performance values of its products do not exceed the given error. The error free value given refers to the average performance value obtained from a series of instruments of the same model.
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Measure fluid
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Conductive liquid, slurry
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conductivity
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≥5 S/cm
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flow rate range
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0.5 ～ 10m/s
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Extended range
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0.1 ～ 15m/s
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accuracy class
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<500mm ± 0.5% ≥ 500mm ± 1.0% (normal flow rate)
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repeatability
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<500 mm ± 0.5% ≥ 500mm 0.3% (normal flow rate)
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Working pressure
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≤ 0.6MPa(DN)
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≤ 1.0MPa(DN2001000)
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≤ 1.6MPa(DN100150)
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≤ 4.0MPa(DN6-80)
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Fluid temperature
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Grade E ＜ 80 ℃
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H-grade ＜ 120 ℃
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protection grade
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IP65
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IP68
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Electrode material
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stainless steel
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Platinum iridium
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Hastelloy
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tantalum
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titanium
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Lining material
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Natural rubber
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Acid resistant rubber
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chloroprene rubber
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polyurethane rubber
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PTFE
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Flange Material
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carbon steel
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output signal
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Standard power supply 4-20 mA
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Frequency 0~1kHz
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communication
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RS-485
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call the police
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normally open
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Working power supply
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DC24V10VA/AC220V10VA
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work environment
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-45℃～0℃
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temperature
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operate
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storage
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20℃～55℃
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humidity
operate
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non-condensing
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@0～10℃
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@10～30℃
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95%
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@30～40℃
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75%
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@40～45℃
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45%
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storage
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non-condensing
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@-20～55℃
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altitude
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2000m
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operate
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storage
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9000m
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vibrate
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＜2g
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impact
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＜20g
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Dimensions of intelligent electromagnetic flowmeter:
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 detected by two or more electrodes in direct contact with the liquid and sent to a converter through a cable for intelligent processing. Then, JYLCD displays or converts it into a standard signal of 4-20mA and 0-1kHz output.
How to choose electrode materials:
The material of the electrode should be selected based on the corrosiveness of the tested liquid. Please refer to the relevant anti-corrosion manual, and tests should be conducted for special fluids.
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material
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Corrosion Resistance
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Molybdenum containing stainless steel
(0Cr18Ni12Mo2Ti)
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Nitric acid, sulfuric acid<5% at room temperature, boiling phosphoric acid, formic acid, alkaline solution, sulfite, seawater, acetic acid under certain pressure
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Hastelloy C
Hastelloy B
(HC 、HB )
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Seawater, saltwater
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Titanium (Ti)
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Seawater, various chlorides and hypochlorous hydrochloric acid, oxidizing acids (including fuming nitric acid), organic acids, alkalis
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Tantalum (Ta)
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Other chemical media except hydrofluoric acid, fuming sulfuric acid, and alkali, including boiling point hydrochloric acid, nitric acid, and sulfuric acid<175 ℃
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Platinum (Pt)
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Various acids, bases, and salts, excluding aqua regia
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How to choose lining material:
The lining material should be selected based on the corrosiveness, wear resistance, and temperature of the tested medium.
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Lining material
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Performance
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scope of application
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Natural rubber
(Soft rubber)
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1. Good elasticity, wear resistance, and tensile strength
2. Resistant to corrosion from general weak acids and bases
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1. 80
2. Water and sewage measurement
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Acid resistant rubber
(Hard rubber)
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Can withstand corrosion from hydrochloric acid, acetic acid, oxalic acid, ammonia water, phosphoric acid at room temperature, as well as 50% sulfuric acid, sodium hydroxide, and potassium hydroxide, but is not resistant to corrosion from strong oxidants
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1- 25+90
2. Measure general acid, alkali, and salt solutions
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chloroprene rubber
(Neoprene)
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1. Excellent elasticity, high tensile strength, and good wear resistance
2. Resistant to corrosion from low concentration acid-base and salt solutions, but not resistant to corrosion from oxidizing media
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1. ＜ 80℃；
2. Measure water, sewage, mud and slurry
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Polyurethane rubber
(Polyurethane)
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1. Excellent wear resistance
2. Poor acid and alkaline resistance
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1. ＜ 40℃
2. Coal slurry, mud, and slurry for measuring neutral and strong wear
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PTFE
(PTFE)
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1. Boiling resistant hydrochloric acid, sulfuric acid, nitric acid, aqua regia, concentrated alkali, and various organic solvents
2. Good wear resistance, poor adhesion performance
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1- 80～+180℃；
2. Measurement of concentration, strong corrosive solutions with concentrated alkali, and sanitary media
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Correct selection:
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The selection of instruments is a very important task in instrument applications. According to relevant data, 2/3 of instrument failures in practical applications are caused by incorrect selection and installation of instruments, and special attention should be paid.
·Collect data
① Name of the tested fluid;
② Maximum and minimum flow rates;
③ Maximum work pressure;
④ Maximum temperature, minimum temperature.
·The tested fluid must have a certain conductivity, with a conductivity of ≥ 5uS/cm.
·The maximum and minimum flow rates must comply with the numbers in the table below. (Extended process range 0.1-15m/s)
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Inner diameter mm
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6
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10
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15
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20
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25
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32
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40
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Minimum flow rate L/h
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10.20
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28.30
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63.60
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120.0
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176.0
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290.0
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452.0
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Maximum flow rate L/h
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1520
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4240
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9540
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16960
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26500
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43420
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67850
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Inner diameter mm
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50
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65
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80
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100
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125
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150
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200
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Minimum flow rate m 3/h
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0.700
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1.190
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1.800
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2.820
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4.410
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6.360
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11.30
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Maximum flow rate m 3/h
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106.0
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179.0
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271.0
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424.0
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662.0
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954.0
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1690
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Inner diameter mm
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250
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300
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350
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400
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450
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500
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550
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Minimum flow rate m 3/h
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17.60
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25.40
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34.60
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45.20
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57.20
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70.60
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85.50
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Maximum flow rate m 3/h
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2650
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3810
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5190
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6780
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8570
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10600
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12800
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Inner diameter mm
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600
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700
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800
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900
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1000
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1100
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1200
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Minimum flow rate m 3/h
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101.0
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138.0
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180.0
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229.0
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282.0
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342.0
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407.0
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Maximum flow rate m 3/h
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15200
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20700
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27100
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34300
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42400
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51300
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61000
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·The actual maximum working pressure must be less than the rated working pressure of the flowmeter.
·The maximum and minimum operating temperatures must comply with the temperature requirements specified by the flowmeter.
·Determine if there is negative pressure present.
How to choose the inner diameter of a flowmeter:
You can choose the corresponding electromagnetic flowmeter based on how to correctly select the flow rate in the table. 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 2-3m/s. When measuring solutions that are prone to crystallization, the flow rate should be appropriately increased to preventElectromagnetic FlowmeterThe electrodes are covered.
How to choose protection level and additional instructions:
Protection level
According to the national standard GB4208-84 and the International Electrotechnical Commission standard IEC529-76 regarding the protection level of enclosures, the standard is:
·IP65: Anti spray type, allowing the faucet to spray water on the sensor from any direction, with a spray pressure of 30kPa, a water output of 2.5L/s, and a distance of 3m.
·IP68: Submersible type, capable of long-term operation in water.
The protection level should be selected according to the actual situation. For sensors installed below the ground and frequently flooded, IP68 should be selected. For sensors installed above the ground, IP65 should be selected.
additional function
The basic type of LT-LDE electromagnetic flowmeter comes with functions such as display, output of 4-20mA, and 0-1kHz alarm. Other additional functions can be added according to the actual situation.
·Split installation: If the sensor needs to be installed below the ground or for other reasons, a split installation method should be selected.
·RS-485 communication requires communication between sensors and other devices, so RS-485 communication function should be selected.
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How to install on pipelines:
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·It should be installed at the lower and vertically upward positions of the horizontal pipeline, avoiding installation at the highest point and vertically downward position of the pipeline;
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·Should be installed at the rising point on the pipeline;
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·When installing an open discharge pipeline, it should be installed at the lower part of the pipeline;
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·If the pipeline drop exceeds 5m, install an exhaust valve downstream of the sensor;
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·Control valves and shut-off valves should be installed downstream of the sensor, rather than upstream of the sensor;
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·Sensors should never be installed at the inlet and outlet of the pump, but rather at the outlet of the pump;
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·Method of installing flow meters in measuring wells
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1. Entrance
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2. Overflow pipe
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3. Entrance barrier
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4. Cleaning hole
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5. Flow meter
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6. Short tube
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7. Export
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8. Discharge valve
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How to choose the installation node correctly:
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Choosing the correct installation point and installing the flow meter correctly are both very important steps. If there is a mistake in the installation process, it can affect the measurement accuracy in mild cases, the service life of the flow meter in severe cases, and even damage the flow meter.
Special attention should be paid when selecting the installation location:
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·The axis of the non measuring electrode must be approximately horizontal;
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·The measuring pipeline must be completely filled with liquid;
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·There should be a minimum of 5 * D (D is the inner diameter of the flow meter) straight pipe section in front of the flow meter, and a minimum of 3 * D (D is the inner diameter of the flow meter) straight pipe section behind it;
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·The flow direction of the fluid is consistent with the arrow direction of the flowmeter;
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·Vacuum inside the pipeline can damage the lining of the flowmeter, so special attention should be paid;
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·There should be no strong electromagnetic field near the flowmeter;
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·There should be ample space near the flowmeter for installation and maintenance;
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·If there is vibration in the measuring pipeline, there should be fixed supports on both sides of the flowmeter. When measuring mixed liquids of different media, the distance between the mixing point and the flowmeter should be at least 30 × D (D is the inner diameter of the flowmeter). To facilitate the cleaning and maintenance of the flowmeter in the future, a bypass pipeline should be installed;
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·When installing a flow meter with PTFE lining, the bolts connecting the two flanges should be tightened evenly, otherwise it is easy to crush the PTFE lining. It is best to use a torque wrench.
Model and specification coding table:
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Specification code
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describe
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Instrument type
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LDE
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Intelligent electromagnetic flowmeter
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Path code
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- × × ×
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Example: 100 represents a diameter of 100 mm
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Electrode form
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1
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Standard fixed type
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2
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Scraper type
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3
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Removable and replaceable
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Electrode material
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-0
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stainless steel
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1
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Platinum Pt
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2
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Ha Shi B (HB)
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3
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Tantalum Ta
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4
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Titanium Ti
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Lining material
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3
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chloroprene rubber
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4
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Polyurethane rubber
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5
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TetrafluoroF4
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6
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F46
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7
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F40
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8
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PO
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9
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PPS
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Rated pressure (Mpa)
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4.0
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DN10-80
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1.6
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DN100-150
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1.0
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DN200-1000
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0.6
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DN1100-2000
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0.25
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DN2200
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operation temperature
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E
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< 80℃
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H
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< 120℃
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ground ring
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-0
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No grounding ring
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1
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There is a grounding ring
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protection grade
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0
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IP65 splash proof type
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1
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IP68 submersible type
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Converter type
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0
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All-In-One
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1
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Split type
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communication
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0
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not have
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1
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RS-485 communication interface
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2
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Hart
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3
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PA bus
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4
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FF bus
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Housing material
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0
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carbon steel
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1
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stainless steel
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Body flange
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0
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carbon steel
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1
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stainless steel
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Install the matching flange
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0
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without
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1
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belt
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power supply
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0
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220VAC
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1
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24VDC
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Instrument range
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xxx
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Example: (2000) indicates that the maximum flow rate corresponding to 20mA is 2000m3/h
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