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E-mail
3929515236@qq.com
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Phone
13031416671 13031317282
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Address
Building 4, Chengde High tech Intelligent Garden, Liandong U Valley, Dongxiying Area, High tech Zone, Chengde City
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Chengde Shenghe Intelligent Instrument Co., Ltd
Working principle of electromagnetic flowmeter
NegotiableUpdate on 01/18
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Overview
Supply Chengde Shenghe Intelligent Electromagnetic Flow Meter, which is an electromagnetic induction flow meter composed of sensors and intelligent signal converters. Capable of measuring the volumetric flow rate of conductive liquids, including highly corrosive liquids such as acids, alkalis, and salts, as well as pulp, mud, slurry, wastewater, seawater, and solid-liquid two-phase liquids.
Product Details
Supply Chengde Shenghe Intelligent Electromagnetic Flow Meter Its working principle is based on Faraday's law of electromagnetic induction. That is, when a conductor moves in a cutting magnetic field, an induced electromotive force is generated in the conductor, and the induced electromotive force UE is: UE=BDV
Among them, UE: Induced voltage B: Magnetic field strength D: Length of conductor (diameter) V: Cutting magnetic field velocity of conductor (average flow velocity) When measuring flow rate, the liquid flows through a magnetic field perpendicular to the flow direction, and the flow of conductive liquid induces a voltage proportional to the average flow velocity (i.e. volume flow rate). The induced voltage signal is detected through two electrodes in direct contact with the liquid and sent to an amplifier, which then converts it into a standard signal output.
Main parameters
instrument model |
SHE1 flange installation, SHE2 plug-in installation |
accuracy class |
0.3 level, 0.5 level (flow velocity ≥ 0.5m/s), 1.0 level (flow velocity ＜ 0.5m/s) |
caliber |
DN15 ～ DN2000 |
power supply |
Standard type: Two wire 24VDC power supply |
Communication type: AC 220VAC power supply | |
output signal |
Analog output: 4-20mA standard current signal output |
HART output: 4-20mA standard current signal output combined with HART | |
RS485 communication RS232 communication | |
display mode |
Double row LCD display for instantaneous flow and cumulative flow |
Protection level |
Integrated: IP65, IP67 |
Split type: Sensor IP68, Converter IP65 | |
Explosion-proof rating |
Explosion proof Exd Ⅱ CT6 |
Measure the lining material of the measuring tube |
PTFE (perfluoroalkoxy, polytetrafluoroethylene), P0 (polyolefin), PUR (polyurethane) |
electrode material |
316L, Hc (Hastelloy C), Hb (Hastelloy B), Ti (Titanium), Ta (Tantalum) |
medium temperature |
-20℃～180℃ |
The installation requirement of electromagnetic flowmeter is to be installed at the Z-low point of the pipeline or the vertical section of the pipeline, but it must be installed when the pipeline is full. The requirement for the straight pipe section is the first 5D and then 3D, so as to ensure the use of electromagnetic flowmeter and the accuracy requirements.
The measurement principle of electromagnetic flowmeter does not depend on the characteristics of flow rate. If there is a certain amount of turbulence and vortex generated in the non measurement area of the pipeline (such as bends, tangential flow restrictions, or partially open shut-off valves upstream), it is irrelevant to the measurement. If there is a steady-state eddy current in the measurement area, it will affect the stability and accuracy of the measurement. In this case, some measures should be taken to stabilize the flow velocity distribution:
1. Increase the length of the front and rear straight pipe sections
2. Adopt a traffic stabilizer
3. Reduce the cross-section of measurement points.
Supply Chengde Shenghe Intelligent Electromagnetic Flow MeterIntegrated electromagnetic flowmeter, split electromagnetic flowmeter, electromagnetic flowmeter manufacturer
