Electromagnetic Flowmeter



The LDG electromagnetic flowmeter is a product that combines the fluid dynamics and electromagnetics according to the working principle of Faraday's electromagnetic induction law to measure the volume flow of conductive liquid. That is, when the conductor cuts the magnetic field line in the magnetic field, an induced electromotive force is generated at both ends thereof. The LDG consists of two parts, a flow sensor and a converter. An excitation coil is arranged on the upper and lower sides of the measuring tube, and a magnetic field is passed through the measuring tube after the excitation current, and a pair of electrodes are mounted on the inner wall of the measuring tube to contact the liquid, and the induced potential is extracted and sent to the converter. A new electromagnetic flowmeter based on the LDG series of electromagnetic flowmeters. No matter in the appearance and assembly method, or in the internal structure, new breakthroughs have been made: the angular appearance, the fast welding without welding process, and the rational distribution of the magnetic field distribution. At the same time, the zinc spraying process has been introduced to protect the surface of the electromagnetic flowmeter tube in a long-lasting environment even under harsh environments, and the surface anti-corrosion performance is superior.
 
 
product description

The LDG electromagnetic flowmeter is a product that combines the fluid dynamics and electromagnetics according to the working principle of Faraday's electromagnetic induction law to measure the volume flow of conductive liquid. That is, when the conductor cuts the magnetic field line in the magnetic field, an induced electromotive force is generated at both ends thereof. The LDG consists of two parts, a flow sensor and a converter. An excitation coil is arranged on the upper and lower sides of the measuring tube, and a magnetic field is passed through the measuring tube after the excitation current, and a pair of electrodes are mounted on the inner wall of the measuring tube to contact the liquid, and the induced potential is extracted and sent to the converter. A new electromagnetic flowmeter based on the LDG series of electromagnetic flowmeters. No matter in the appearance and assembly method, or in the internal structure, new breakthroughs have been made: the angular appearance, the fast welding without welding process, and the rational distribution of the magnetic field distribution. At the same time, the zinc spraying process has been introduced to protect the surface of the electromagnetic flowmeter tube in a long-lasting environment even under harsh environments, and the surface anti-corrosion performance is superior.



Features

♦ Small flow high precision, the lower limit can reach 0.03m/s;
♦ The sensor shells are all made of precision aluminum molds. The products are beautiful, the appearance is consistent, the fit is tight, the whole is no welding, the loading and unloading is fast, and the maintenance is convenient;
♦ Humanized bottom design, stable placement;
♦ Thickened lining, curved electrode, with good corrosion resistance and wear resistance, more adaptable to mixed media;
♦ There is no obstruction in the measuring tube, no pressure loss, and the requirements of the straight pipe section are low. Unique adaptability to slurry measurement;
♦ 16-bit embedded microprocessor, fast calculation speed, high precision, programmable frequency low frequency rectangular wave 砺 magnetic, improve the stability of flow measurement, low power consumption;
♦ SMD device and surface mount (SMT) technology, high circuit reliability;
♦ On-site, the range can be modified online according to the actual needs of the user to better match the collection terminal;
♦ Measurement results are independent of fluid pressure, temperature, density, viscosity and other physical parameters;
♦ With digital communication signal output such as RS485, RS232, Hart and Modbus, Profibus-DP (optional);
♦ Self-test and self-diagnosis and alarm function;
♦ There are three internal accumulators to display the forward cumulant reverse cumulant and the difference accumulate. There is a power-down clock inside, which can record 16 power-down times (optional);
♦ Ultra-low EMI switching power supply, suitable for wide range of power supply voltage and good anti-EMI performance.


Product specification

Executive standard	Electromagnetic flowmeter (JB/T 9248-2015)
Nominal pass (mm)	Pipeline PTFE lining: DN15-DN2000
(Special specifications can be customized)	Pipeline rubber lining: DN65-DN2000
	Pipeline F46 lining: DN4-DN600
Flow direction	Positive, negative, net flow
Range ratio	150:01:00
Repeatability error	±0.1% of the measured value
Accuracy level	Level 0.5, level 1.0
Measured medium temperature	Conventional rubber lining: -20 ~ +60 ° C
	High temperature rubber lining: -20 ~ +90 ° C
	PTFE lining: -30 ~ +120 ° C
	High temperature type PTFE lining: -20～+160°C
Rated working pressure (high pressure can be customized)	DN15～DN25≤4.0MPa
	DN32～DN300≤1.6MPa
	DN350～DN800≤1.0MPa
	DN800～DN2000≤0.6MPa
Flow rate range	0.1-15m/s
Conductivity range	The measured fluid conductivity is ≥20μs/cm
Signal output	4 to 20 mA (load resistance 0 to 750 Ω), pulse / frequency
Communication output	RS485, MODBUS protocol, GPRS output
Power supply	220VAC, tolerance 15% or 24VDC, ripple ≤ 5%
Required straight pipe length	Upstream ≥5DN, downstream ≥2DN
Connection method	Flange connection between flowmeter and piping, flange conforms to international standards: GB/T9119-2000
Protection level	IP67, special order up to IP68
Ambient temperature	-25～+60°C
Relative humidity	5% to 95%
Total power consumption	Less than 7.5W

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