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Low Conductivity Electromagnetic Flowmeter
ABDT-LD series smart electromagnetic flowmeter is a relatively mature liquid measurement instrument suitable for measuring the volume flow of conductivity liquid (conductivity≥5µs/cm) and slurry in closed pipes.It is suitable for various acid,alkali and salt solutions,clear water,sea water,sewage, pulp, mud, mortar, pulp, coal water slurry, filling equipment (Baijiu, soy sauce, vinegar, fruit juice, mineral water, etc.) and low conductivity medium etc.It is widely used in industrial production process control,energy measurement, environmental protection,sewage treatment and other fields. 4~20mA current signal,pulse signal and it is combined with display, recording instrument, calculator or regulator for detection, calculation,adjustment and control of flow.
Product Details
Overview
ABDT-LD series low conductivity electromagnetic flowmeter is a liquid measuring instrument specially used for measuring low conductivity media (conductivity ≥ 4.5μs/cm) , suitable for the flow measurement of various acid and alkali solutions, clear water, sea water and food grade liquid. It is widely used in industrial production process control, energy measurement, environmental protection and sewage treatment. It can output (4~20) mA current signal, pulse signal, etc.. It is coupled with the display, recording instrument, accumulation operator or regulator for flow detection, product calculation, adjustment and control.
Characteristics
ABDT-LD series low conductivity electromagnetic flowmeter has the following characteristics:
● It is not affected by changes in fluid density, viscosity, temperature, pressure and electrical conductivity. The linear measurement principles can achieve high precision measurements;
● No flow parts in measuring pipe, small pressure loss and low straight pipe section requirement;
● The nominal diameter DN15-DN600 covers a wide range,lining and electrodes that meet the requirements of measuring a variety of conductive fluids;
● The converter adopts programmable low frequency rectangular wave excitation, which improves the stability of flow measurement and small power loss;
● The converter adopts a 16-bit embedded microprocessor with full digital processing, fast operation speed, strong interference resistance, reliable measurement, high accuracy and flow measurement range up to 1500:1;
● High definition backlight LCD display, full Chinese character menu operation, easy to use, easy operation, easy to learn and easy to understand;
● RS485 digital communication signal output;
● It has the conductivity measurement function, which can determine whether the pipe of the sensor is fully filled, and has the self-inspection and self-diagnosis function;
● It uses SMD devices and surface mounting (SMT) technology with high circuit reliability;
● It can be used for the corresponding explosion-proof occasions.
Use environmental conditions
Ambient temperature: sensor (-25~+60) ℃; converter (-20~+ 60) ℃
Relative temperature: (5~85)%RH
Working conditions
Maximum fluid temperature: integrated type ≤ 70℃
Separated type: PTFE lining ≤ 80℃
Polyneoprene lining ≤ 65℃
High temperature rubber ≤ 120℃
Polyurethane rubber lining ≤ 60℃
PFA lining ≤ 150℃
F46 lining ≤ 110℃
Fluid conductivity ≥ 5uS/cm
Product composition
The electromagnetic flowmeter consists of two parts: electromagnetic flow converter and electromagnetic flow sensor.
Product type
When used to measure the low conductivity media, the ABDT-LD series electromagnetic flowmeter is only the integrated type. It can be used in the specified explosion-proof places.
The sensor is available with electrodes of seven different materials and a lining of six different materials.
Technical Performance Indicators of the Product
1. Execution standard: JB/T9248-2015
2. Maximum flow speed: 15m/s
3. Nominal general diameter: DN10,15, 20, 25, 32, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600,700,800,1000,1200,1400,1600
4. Precision: 0.5%
5. Nominal pressure: (1.0, 1.6, 2.5, 4.0) MPa, Other specifications and standards may be subject to the user requirements.
6. Materials: electrode form and material
Electrode form can be divided into standard type, scraper type, removable type and the grounding electrode.
The electrode and grounding electrode materials are 7 kinds of 316L stainless steel, harden alloy B, harden alloy C, titanium, tantalum, platinum alloy, stainless steel coated with tungsten carbide.
Flange material: carbon steel, stainless steel (optional)
Grounding ring material: stainless steel
Door protection ring material: stainless steel, carbon steel.
7. Shell protection
IP65
8. Explosion-proof standards:
Explosion-proof grade: ExdmbIIC T6 Gb
9. Converter performance
Power supply: single-phase AC power (85-265) V, (45-63)Hz, power is less than 20W; DC power supply (11-40) VDC.
Converter display and programming operation: 4 film keys can set all parameters and can also program the converter by using foreign receiver or PC machine (RS485, RS232), high definition backlight LCD display, empty pipe detection and self-diagnosis function.
Digital communication: RS485, RS232, MODBUS and REMOTE, with lightning protection.
Output signal
Current output: two-way circuit, full isolation (0-10) mA/(4-20)mA; load resistance: (0-10) mA, (0-1.5) KΩ; (4-20)mA , (0-750) Ω.
Frequency output: forward and reverse flow output, the upper limit of output frequency can be set in the range of (1-5000) HZ. Transistor collector is with photoelectric isolation output in both directions. The external power supply is not more than 35V, and the maximum collector current is 250mA when it is turned on.
Pulse output: forward and reverse flow output, output pulse up to 5000cp/s. Pulse equivalents are 0.001L-1.0m3/cP. Pulse width is automatically set to 20ms or square wave. Open collector output of transistor with photoelectric isolation. The external power supply is not more than 35V, and the maximum collector current is 250mA when it is turned on.
Flow direction indication output: this flowmeter can measure fluid flow in positive and negative direction. The direction of the fluid flow can also be judged.High level of output + 10V for displaying forward flow, and low level of 0V for reverse fluid flow output.
Alarm output: two transistor collector open circuit alarm output with photoelectric isolation. The external power supply is not more than 35V, and the maximum collector current is 250mA when it is turned on. Alarm state: fluid air pipe, excitation line break, flow over limit.
Damping time: 0s-100s, optional
Electrode material selection
Electrode material | Features and use scope |
316L | Applicable: 1. Domestic water, industrial water, raw water, well water and urban sewage. 2. Weak corrosive acid, alkali and salt solution. |
Haynes metal B | Applicable: 1. The hydrochloric acid (concentration is less than 10%) and so on non-oxidized acids. 2. Sodium hydroxide(concentration is less than 50%), all concentrations of ammonium hydroxide alkali solution. 3. Phosphoric acid, organic acid. Not applicable: Nitric acid. |
Haynes metal C | Applicable: 1.Mixed acid, such as the mixed solution of chromic acid and sulfuric acid. 2. Oxidation salts such as Fe+++, Cu++, sea water. Not applicable:the hydrochloric acid. |
Ti | Applicable: 1. Salt, such as (1) chloride (chloride/magnesium and aluminum/calcium/ammonium/iron, etc.) (2) Sodium salt,potassium salt, hypochlorite salt, sea water. 2.Potassium hydroxide, amine hydroxide and barium hydroxide alkali solution whose concentration are less than 50%; Not applicable: hydrochloric acid, sulfuric acid, phospic acid, hydrofluoric acid and other reductive acid. |
Ta | Applicable: 1. Hydrochloric acid (concentration is less than 40%), dilute sulfuric acid and concentrated sulfuric acid (excluding fuming sulfuric acid); 2. Chloride dioxide, iron chloride, hypochlorite,sodium cyanide, lead acetate, etc.; 3. Nitric acid (including fuming nitric acid) and other oxidizing acid, aqua regia whose temperature is less than 80 degrees; 4. Not applicable: alkali, hydrofluoric acid. |
Platinum-iridium alloy | Applicable: Almost all acid, alkali and salt solutions (including fuming nitric acid, fuming sulfuric acid) Not applicable: aqua regia, ammonium salt. |
Tungsten carbide | Applicable: large worn medium,paper pulp,sewage,resistant to interference of solid particles; Not applicable: inorganic acid, organic acid, chloride. |
Lining material selection
Lining material | Main performance | Scope of application |
PTFE | 1. One of the most stable materials in plastic that can withstand boiling hydrochloric acid, sulfuric acid, nitric acid and aqua regia and it can resist strong acid and a variety of organic solvents. 2. Poor wear resistance and adhesion performance. | 1. Temperature-resistant ≤ 80℃ 2. Strong corrosive medium such as acid and alkali. 3. Sanitary medium. |
Polyfluoroalkoxy (PFA) | 1. Chemical stability, electrical insulation, lubricity, non-viscosity and combustible properties are similar to F46, but the PFA material strength, aging resistance and temperature resistance are better than F46. 2. Good adhesion with metal and better wear resistance than PTFE, F46. 3. Low smoke, refractory, high temperature resistance and high temperature mechanical strength are higher than PTFE and F46. | 1. Long-term use temperature resistance ≤ 150℃. 2. It can be used to measure most strong corrosive mediums such as strong acid, strong alkali and strong oxidizer; but it is not for KOH, nitric acid, hydrofluoric acid, etc. |
PDF-ethylene propylene F46 | 1. Chemical stability, electrical insulation, lubricity, non-viscosity and combustible properties are similar to PTFE, but the F46 material strength, aging resistance and temperature resistance are better than PTFE. 2. Good adhesion with metal and better wear resistance than PTFE. 3.Excellent anti-tear performance. | 1. Long-term use temperature resistance ≤ 110℃ 2. It can be used to measure most strong corrosive mediums such as strong acid, strong alkali and strong oxidizer, but it is not for KOH, nitric acid, hydrofluoric acid, etc. |
Polyneoprene rubber | 1. Excellent elasticity, good wear resistance. 2. It has resistance to corrosion of general low concentration acid, alkali and salt medium and it has no resistance to corrosion of oxidation medium. | 1.Temperature resistance ≤ 65℃ 2.Measure the general water, sewage, mud and mineral slurry. |
Urethane rubber | 1. Excellent wear resistance and good oil resistance. 2. High strength,good tear resistance, but the acid and alkaline resistance are poor. | 1. Generally long-term temperature resistance≤ 60℃ |
Outline size
Outline and installation size of the electromagnetic flow sensor (in mm)
Nominal diameter | L | Flange dimensions (GB/T9119-2010) | |||||
D | K | d0 | N | C | PN | ||
10 | 200 | 90 | 60 | 14 | 4 | 14 | 4.0MP |
15 | 200 | 95 | 65 | 14 | 4 | 14 | |
20 | 200 | 105 | 75 | 14 | 4 | 16 | |
25 | 200 | 115 | 85 | 14 | 4 | 16 | |
32 | 200 | 140 | 100 | 18 | 4 | 18 | |
40 | 200 | 150 | 110 | 18 | 4 | 18 | |
50 | 200 | 165 | 125 | 18 | 4 | 20 | |
65 | 200 | 185 | 145 | 18 | 8 | 20 | 1.6MP |
80 | 200 | 200 | 160 | 18 | 8 | 20 | |
100 | 250 | 220 | 180 | 18 | 8 | 22 | |
125 | 250 | 250 | 210 | 18 | 8 | 22 | |
150 | 300 | 285 | 240 | 22 | 8 | 24 | |
200 | 350 | 340 | 295 | 22 | 12 | 26 | |
250 | 450 | 405 | 355 | 26 | 12 | 29 | |
300 | 500 | 445 | 400 | 22 | 12 | 26 | 1.0MP |
350 | 500 | 505 | 460 | 22 | 16 | 30 | |
400 | 600 | 565 | 515 | 26 | 16 | 32 | |
450 | 600 | 615 | 656 | 26 | 20 | 36 | |
500 | 600 | 670 | 620 | 26 | 20 | 38 | |
600 | 600 | 780 | 725 | 30 | 20 | 42 | |
700 | 700 | 910 | 840 | 36 | 24 | 38 | |
800 | 800 | 1025 | 950 | 39 | 24 | 38 | |
900 | 900 | 1125 | 1050 | 39 | 28 | 40 | |
1000 | 1000 | 1255 | 1170 | 42 | 28 | 42 | |
1200 | 1200 | 1455 | 1380 | 39 | 32 | 38 | |
1400 | 1400 | 1675 | 1590 | 42 | 36 | 42 | |
1600 | 1600 | 1915 | 1820 | 48 | 40 | 46 |
Installation precautions
Keep a long enough straight pipe section upstream and downstream of the electromagnetic flow sensor (D is the sensor diameter) as required in the figure below.
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