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Flow meter

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YFLD electromagnetic flowmeter

Overview:YFLD type electromagnetic flowmeter is an electromagnetic induction type flow measuring instrument, which is used to measure the volume flow of various conductive liquids. The measured media


YFLD type electromagnetic flowmeter is an electromagnetic induction type flow measuring instrument, which is used to measure the volume flow of various conductive liquids. The measured media include acids, alkalis, salts and other highly corrosive liquids, and pulp, mud, pulp, waste water , Seawater and solid-liquid two-phase fluid. This product is mainly used in petrochemical, steel, electric power, metallurgy, textile, food, pharmaceutical, papermaking and other industries, as well as in municipal environmental protection, water conservancy and other fields.

working principle:

The working principle is based on Faraday's law of electromagnetic induction. That is: when the conductor moves in a cutting magnetic field in a magnetic field, an induced electromotive force is generated in the conductor, and the induced electromotive force UE is: UE = BDV where UE: induced voltage

B: magnetic field strength

D: length of the conductor (diameter)

V: conductor cutting magnetic field velocity (average velocity)

When measuring the flow, the liquid flows through a magnetic field perpendicular to the flow direction. The flow of the conductive liquid induces a voltage proportional to the average flow rate (that is, the volume flow rate). The induced voltage signal is detected by two electrodes that are in direct contact with the liquid. , And sent to the amplifier, and then converted into a standard signal output.

The YFLD type electromagnetic flowmeter consists of a sensor and a signal converter. According to the structure type, it is divided into two types: flange connection type (LD1 type, see Figure 2) and plug-in type (LD2 type, see Figure 3). According to the converter and sensor The assembly form can be divided into two types of integrated structure and split type structure.

The main technical parameters:

1 Sensor parameters

1.1 Flange connection type (LD1 type)

Applicable pipe diameter: DN15 ~ DN1000, other diameters are non-standard, and can be customized according to user requirements.

Lining material of measuring tube: F46 (polyperfluoroethylene propylene), P0 (polyolefin), PUR (polyurethane)

Electrode material: 316L, Hc (Hastelloy c), Hb (Hastelloy b), Ta (tantalum)

Working pressure: DN15 ~ DN80 Caliber: 4.0MPa (standard)

DN100 ~ DN150 caliber: 1.6MPa (standard)

DN200 ~ DN1000 caliber: 1.0MPa (standard)

Those that exceed the above pressure standards are non-standard types, which can be customized according to user requirements.

Fluid temperature: F46 lining: -40 ℃ ~ 180 ℃, P0 lining: -20 ℃ ~ 80 ℃; PUR lining: 0 ~ 50 ℃

Process connection flange: The flange standard in this volume is HG / T20592-2009, and other standard flanges can also be customized according to user requirements.

Ground ring material: 304, 321, 316, Hc, Ti, Cu

1.2 Plug-in type (LD2 type)

Applicable pipe diameter: ≥80mm

Sensor material: stainless steel (1Cr18Ni9Ti) + polytetrafluoroethylene (PTFE)

Sensor probe outer diameter: Φ37mm

Sensor insertion depth: 1 / 8D and ≤40mm (D is the inner diameter of the tube)

Working pressure: 1.0MPa, 1.6MPa, 4MPa, 25MPa (special)

Fluid temperature: -40 ℃ ~ 100 ℃, 100 ℃ ~ 180 ℃ (high temperature)

2 converter parameters

Measuring range: flow rate 0.1 ~ 10m / s, flow rate of each caliber = pipe cross-section area × flow rate

Accuracy level: 0.3 level, 0.5 level (velocity ≥ 0.5m / s), 1.0 level (velocity<0.5m / s), 2.0 level (velocity <0.2m / s)

Conductivity:> 5μs / cm

Output signal: 4 ~ 20mADC, load ≤750Ω; 0 ~ 1000Hz pulse output, active 24V,> 10mA; RS485;

4 ~ 20mADC + HART

Working power: 220VAC ± 10%, 50Hz ± 1Hz; 24VDC ± 10%

Power consumption:<7W

Explosion-proof grade: Exd (ia) iaqⅡCT6, Exd (ia) iaqⅡBT4

Housing protection: integrated: IP65; split type: sensor IP68, converter IP65

Ambient temperature: -25 ℃ ~ 60 ℃ (explosion-proof type to 50 ℃)

Ambient humidity: ≤85% RH (at 20 ° C)

Electrical interface size: M20 × 1.5, 1 / 2NPT (outer diameter of cable Φ6 ~ Φ10)

YFLDYaFeng Intelligent electromagnetic flowmeter


Structure typeF



Lining material1Neoprene2Polyurethane
3Silicone fluorine rubber4Teflon
Electrode materialPL316LTititanium
HBHastelloy BPtPlatinum iridium alloy
HCHastelloy CTSpecial custom
Power supply1220AC
0Powered by lithium battery
Shell materialCCarbon steel
PLStainless steel
Protection class5IP65
Communication outputA4-20mA,Pulse, frequency
HHART communication protocol
Explosion-proof grade
No explosion protection required

Intrinsically safe Exia IICT1 ~ T6

Flameproof Exd IBT1 ~ T6
Mating flange
Without mating flange
/FMating flange


Model of electromagnetic flowmeter:
The name of the fluid medium and its physical properties:
Maximum working pressure, maximum working temperature, and minimum working temperature for fluid working:
Common flow, maximum flow and minimum flow of fluid: