Electromagnetic Flowmeter

1stainless steelElectromagnetic FlowmeterOverview

due toElectromagnetic FlowmeterDue to its advantages, it is widely used in various industrial fields such as chemical fiber, food, papermaking, sugar production, mining and metallurgy, water supply and drainage, environmental protection, iron, petroleum, pharmaceuticals, etc. It is used to measure the volume flow rate of conductive fluid media such as acid, alkali, salt solution, slurry, pulp, coal water slurry, corn slurry, fiber slurry, sewage, cooling raw water, water supply and drainage, salt water, hydrogen peroxide, beer, wort, various beverages, black liquor, etc.
2、 Characteristics

Low frequency three value rectangular wave constant current excitation, not affected by power frequency and various stray interferences on site, works very stably and reliably.
Adopting a new technology of non-uniform magnetic field and a special magnetic structure, the magnetic field is stable and greatly reduces the volume and weight, making the flowmeter have the characteristics of small and lightweight
Adopting specialized electronic circuits with automatic zeroing function for air traffic control.
On site, the range can be modified online according to the actual needs of the user.
There are no movable parts or flow blocking components. There is almost no additional 0D pressure loss during measurement.
The measurement results are independent of physical parameters such as flow velocity distribution, liquid pressure, temperature, density, viscosity, etc
● Easy to use, only need to connect the power supply after installation, no other operation is required, and it can provide standard signals, which is convenient for non professionals to use

3、 Measurement principle

Electromagnetic flow sensors are made based on Faraday's law of electromagnetic induction. The conductor that cuts the magnetic field lines is not a typical metal, but a liquid fluid or liquid-solid two-phase fluid with a certain conductivity. When the measured conductive medium cuts magnetic field lines in a magnetic field. Induced electromotive force is generated in a conductive medium, which is detected by a pair of electrodes. The voltage signal V can be expressed by the following equation: V=KBDVK: proportionality constant B: magnetic induction intensity D: measuring tube inner diameter v: measuring the average flow velocity signal v within the Cao section. After processing by a converter, a frequency signal o5VOCO-5VDC that is linearly related to the flow rate is generated for later instrument integration or control.

4、 Technical parameters

Execution standard: JB/T9248-2000
Nominal diameter DN: (mm) Pipeline PTFE lining: 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200~1200
Pipeline rubber lining: 40, 50, 65, 80, 100, 125, 150, 200, 300, 300, 504, 400, 500, 600, 600~1200
Insertion type: 3504004505006007008001000~1200
Note: Special specifications can be customized
Accuracy level: Pipeline type: 0.2 level (intelligent type), 0.5 level, 1.0 level
Insertion type: Level 2.0
Medium temperature: chloroprene rubber lining: -20~60 ℃; Polypropylene PO lining: -20~90 ℃
Polyvinyl chloride lining: -30~100 ℃; High temperature PTFE lining: -30~150 ℃
Insertion type: -30~100 ℃
Working pressure: Pipeline type: DN10- DN65: 2.5Mpa DN80- DN150: 1.6Mpa DN200- DN600: 1.0Mpa
Insertion type: 1.0Mpa
High pressure type: DN25-50:50Mpa DN65-100:35Mpa
Flow range: The flow measurement range corresponds to a flow velocity range of 0.05-10m/s
Conductivity range: Conductivity not less than 20 µ s/cm
Output signal and load: 0-10mADC, 0-1000 Ω; 0-1000Hz; not less than 10K Ω
0/4-20mADC, 0-500 Ω; 1-5V, 0-5V, not less than 10K Ω
Electrode materials include tear stainless steel, titanium Ti, tantalum Ta, Hastelloy HB
Protection level: Pipeline type: IP65 Plug in/Submersible/Open channel type: IP68
Explosion proof mark: dIIBT4
Power supply: 220VAC ± 10%, 50Hz ± 5%, 24VDC ± 1V
Direct section length: Pipeline type: upstream ≥ 5DN, downstream ≥ 20DN Insertion type: upstream ≥ 10DN, downstream ≥ 5DN
Connection method: The flowmeter and piping are connected by flanges, and the flange connection size should comply with the provisions of GB9119-88
High pressure type: butt welded connection between the manufacturer's high-pressure flange and piping
Environmental temperature: -25% to 45 ℃
Relative humidity: 5% to 95%
Total power: less than 25W