Electromagnetic flowmeter various model parameters

Source: Published: 2012-8-22 9:16:45 Author:

There are many types of electromagnetic flowmeters , and the technical requirements of each type of equipment are different. Now, the technicians of Kaifeng Cologne Flowmeter Co., Ltd. answer all the technical parameters.

1. First, the working principle of electromagnetic flowmeter

The measurement principle is based on Faraday's law of electromagnetic induction. That is, the conductive liquid moves in the magnetic field to cut the magnetic field line, and the induced electromotive force occurs in the conductor, and the induced electromotive force E is:

E=KBVD  

K = external constant

B = magnetic induction

V = uniform flow rate of the measuring tube section

D = inner diameter of the measuring tube

When measuring flow, the fluid flows through a magnetic field perpendicular to the direction of motion. The activity of the conductive liquid induces a voltage proportional to the uniform flow rate ( i.e., volume flow ) , thus pleading for the lowest concentration of conductivity of the active liquid being tested. The sensing is detected by two electrodes that are in direct touch with the liquid and transmitted to the amplifier via a cable and then converted to a consistent output signal.

2. Technical parameters

A sanitary electromagnetic flowmeter parameters

· Nominal diameter: DN105 ~ DN600mm;
· Nominal pressure: 0.6 ~ 4.0MPa;
· Accuracy: ±0.5%; ±0.3%;
· Measurement range: 0.3 ~ 15m / s (flow rate);
Lining material: sanitary polytetrafluoroethylene;
· Electrode material: molybdenum-containing stainless steel, titanium (Ti), tantalum (Ta), Hastelloy (H), platinum (Pt) or other special electrode materials;
· Housing material: stainless steel;
· Medium temperature: -30 ° C ~ +1000 ° C;
· Ambient temperature: -25 ° C ~ +60 ° C  
· Power supply: 220V AC or 24V DC  
B. Battery powered electromagnetic flowmeter

C. Integrated electromagnetic flowmeter technical parameters

High-pressure electromagnetic flowmeter technical parameters:

Lining: F46
Dielectric conductivity: ≥20μs/cm
Ambient temperature: -10 ° C ~ +60 ° C
Nominal diameter: DN10 ~ DN100
Connection method: flange type, oil-type medium temperature: 0 ~ +80 ° C (converter)
0 to +180 ° C (sensor)
Power supply: 220VAC 50Hz or 24VDC
Nominal pressure: 6.3, 10, 16, 25, 32 MPa
Accuracy: ±0.5% of the indicated value, ±0.3% or ±0.2% of the optional value
Explosion-proof mark: explosion-proof type of sensor is ExmIIT4, ExmdIIBT4
Electrode material: 316L stainless steel, Hastelloy B, Hastelloy C, titanium, tantalum and other electrode shells Protection grade: sensor IP65, IP68 optional (IP65: dusttight, water-proof; IP68: dusttight, can work for a long time In the water.)
Converter IP65

D. Intelligent electromagnetic flowmeter technical parameters

·Nominal diameter: DN6 ~ DN3000mm

·Nominal pressure: 0.6 ~ 70MPa

· Accuracy: ±0.5% of the indicated value, ±0.3% or ±0.2% of the optional value

· Lining material: PTFE, PFA, F46, neoprene, urethane rubber

·Electrode form: standard type, scraper type, replaceable type

·Electrode material: molybdenum-containing stainless steel, Hastelloy B, Hastelloy C, titanium, tantalum, platinum-rhodium alloy, stainless steel coated tungsten carbide

·Medium temperature: split type: neoprene lining, polyurethane lining: -10 ° C ~ +80 ° C

PTFE lining, PFA lining, F46 lining: -10 ° C ~ +160 ° C

Integrated type: -10°C～+80°C

· Ambient temperature: -25 ° C ~ +60 ° C

· Ambient humidity: 5 ~ 100% RH (relative humidity)

·Medium conductivity: ≥5μs/cm

· Measurement range: 1500:1 Flow rate setting < 15m/s

·Structural form: integrated type, split type, immersed type, explosion-proof type

·Protection grade: IP65, IP68 optional (IP65: dust tight, water spray proof; IP68: dust tight, continuous soaking, only split type)

·Explosion-proof mark: ExmbIIT4 ·Product standard: JB/T9248-1999 electromagnetic flowmeter flow rate range: 0.01m/s~10m/s
The above are the technical requirements of several types of electromagnetic flowmeters , which the customer can use as a reference. Because the flowmeter is widely used in petroleum, chemical, metallurgy, textile, paper, environmental protection, food and other industrial sectors and municipal management, water conservancy construction, river dredging and other fields of flow measurement, so remind everyone, choose to buy equipment must choose Manufacturers with product guarantees are not allowed to be deceived.