LDC type electromagnetic flowmeter-Global supplier

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LDC type electromagnetic flowmeter

The LDC electromagnetic flowmeter is used to detect the flow rate of sewage, pulp, slurry, slurry and other liquids with a conductivity greater than 5

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summary:

The LDC electromagnetic flowmeter is used to detect the flow rate of sewage, pulp, slurry, slurry and other liquids with a conductivity greater than 5 μ S/cm. It is widely used in industries such as petroleum, chemical, steel, food, power, papermaking, water treatment, etc.

characteristic:

For harsh working conditions, such as fluids mixed with high concentration mud or bottom conductivity, it can achieve high standard stable measurement;

Measurement is not affected by changes in fluid density, viscosity, temperature, or pressure;

There are no flow blocking components inside the measuring tube, with low pressure loss, maintenance free, and low requirements for straight pipe sections;

The sensor can be equipped with a grounding electrode to achieve good grounding of the instrument;

The sensor adopts advanced processing technology, which enables the instrument to have good pressure resistance;

Full digital processing, strong anti-interference ability, reliable measurement, high accuracy, with bidirectional flow measurement and bidirectional total accumulation function;

◆ HART communication function.

working principle:

The basic principle of electromagnetic flowmeter is Faraday's law of electromagnetic induction. When a conductor cuts magnetic field lines in a magnetic field, an induced electromotive force will be generated inside the conductor. Apply this principle to measure the flow of conductive liquid inside a tube, with the direction of fluid flow perpendicular to the direction of the magnetic field (see figure). The induced electromotive force generated in the fluid is detected by a pair of electrodes located at the radial ends of the tube. The induced electromotive force (signal voltage) UE is proportional to the magnetic induction intensity B, the distance between the electrodes D, and the average flow velocity V. The magnetic induction intensity B is proportional to the electrode distance D and the average flow velocity V. Due to the constant magnetic induction intensity B and electrode distance D, the induced electromotive force (signal voltage) UE is proportional to the average flow velocity V, and the volumetric flow rate is proportional to the average flow velocity V. Therefore, the volumetric flow rate is proportional to the induced signal voltage. In the signal converter, the induced signal voltage is converted into volumetric flow rate and also into programmable analog and digital signal outputs.

Schematic diagram of electromagnetic flowmeter

Main technical parameters:


Design form	Integrated type	Split type
Connection method	Flange connection	Flange connection

sensor
model	LDC43	LDC47	LDC41	LDC48
Explosion proof grade	nothing	Exd[ia]iamllCT5	nothing	Exd[ia]iamllCT5
caliber	DN3-DN2000
Pressure rating (MPa)	Standard: 0.6-4.0 (by caliber) Special: According to user requirements
Flange material	Carbon steel, stainless steel
Lining material	Rubber, PTFE, PFA, etc
Electrode material	316, 316L Hb、Hc、 Titanium, tantalum, platinum iridium, etc
Grounding electrode (ring) material	316, 316L Hb、Hc、 Titanium, tantalum, platinum iridium, etc
conductivity	≥ 5 μ S/ m
Medium temperature	-40 ℃~180 ℃ (PTFE lining) -25 ℃~65 ℃ (rubber lining)
Protection level	IP67, IP68

converter
Power supply	24VDC or 220VAC
signal output	Current 4-20mA, frequency output, pulse output
power waste	≤ 10W (AC power supply); ≤ 9W (DC power supply)
On site display	LCD display, instantaneous and cumulative
environment condition	Environmental temperature: -20 ℃ to 60 ℃; Relative humidity: 5% to 90%
accuracy	± 0.2%, ± 0.5% (measured values)
Repeatability	0.2% measurement value
measuring range	Recommended range of use: 0.3m/s to 10m/s, continuously adjustable Usage range: 0.01m/s~15m/s continuously adjustable
Excitation method	Excitation frequency 6.25, 12.5, 15, 25, 30Hz
Communication method	Hart communication (optional), RS485 communication (optional) or fieldbus
Protection level	IP67		IP67
Explosion proof grade	nothing	Exd[ia]iamllCT5	nothing	Exd[ia]iamllCT5
Electrical interface	M20 × 1.5 or 1/2 "NPT
Shell material	Cast aluminum

External dimensions:

1. Flange connection: DN3－100

caliber mm	pressure MPa	Instrument dimensions (mm)				Flange connection size (mm)				Weight (kg)
caliber mm	pressure MPa	L	G	G1	C	D	K	n	d	Integrated type	sensor
3-8	4.0	130	346	234	62	90	60	4	14	5.0	4.0
10	4.0	200	346	234	62	90	60	4	14	5.5	4.5
15	4.0	200	346	23	60	95	65	4	14	5.5	4.5
20	4.0	200	368	256	73	105	75	4	14	6.0	5.0
25	4.0	200	358	256	73	115	85	4	14	6.5	5.5
32	4.0	200	378	266	78	140	100	4	18	8.0	7
40	4.0	200	386	274	82	150	110	4	18	8.5	7.5
50	4.0	200	402	290	90	165	125	4	18	10.0	9.0
65	4.0	250	430	318	104	195	145	8	18	14.0	13.0
80	4.0	250	442	330	110	200	160	8	18	18.0	16.0
100	4.0	250	482	370	130	220	180	8	18	19.0	17.0

1) Other pressure levels can be provided according to user requirements.

2) When the grounding method is the grounding electrode (standard configuration), the DN3-100 caliber and size L remain unchanged.

3) When the grounding method is a grounding ring, install a grounding ring on a single flange with a diameter of DN3-100 and an increase of 3mm in size L.

4) When the grounding method is a grounding ring, install grounding rings on both flanges with a diameter of DN3-100 and an increase of 6mm in size L.

2. Flange connection: DN125－1000

External dimensions:

caliber mm	pressure MPa	Instrument dimensions (mm)				Flange connection size (mm)				Weight (kg)
caliber mm	pressure MPa	L	G	G1	C	D	K	n	D	Integrated type	sensor
125	1.6	250	466	355	127	250	210	8	18	29.0	28.0
150	1.6	300	508	397	148	285	240	8	22	31.0	30.0
200	1.0	350	570	459	179	340	295	8	22	55.0	54.0
200	1.6	350	570	459	179	340	295	12	22	55.0	54.0
250	1.0	450	626	515	207	395	350	12	22	80.0	79.0
250	1.6	450	626	515	207	405	355	12	26	80.0	79.0
300	1.0	500	712	601	250	445	400	12	22	87.0	86.0
300	1.6	500	712	601	250	460	410	12	26	87.0	86.0
350	1.0	550	729	618	250	505	460	16	22	128.0	126.0
350	1.6	550	729	678	250	520	470	16	26	148.0	146.0
400	1.0	600	780	669	275	565	515	16	26	153.0	151.0
400	1.6	600	780	669	275	580	525	16	30	173.0	171.0
450	1.0	600	829	718	304	615	565	20	26	171.0	169.0
450	1.6	600	829	718	304	640	585	20	30	193.0	191.0
500	1.0	600	851	740	310	670	620	20	26	189.0	187.0
500	1.6	600	851	740	310	715	650	20	33	213.0	221.0
600	1.0	600	952	841	361	780	725	20	30	245.0	243.0
600	1.6	600	952	841	361	840	770	20	36	315.0	313.0
700	1.0	700	1032	920	405	859	840	24	30	319.0	317.0
700	1.6	700	1032	920	405	910	840	24	36	387.0	385.0
800	1.0	800	1132	1020	455	1015	950	24	33	385.0	383.0
800	1.6	800	1132	1120	455	1025	950	24	39	450.0	448.0
900	1.0	900	1232	1120	505	1115	1050	28	33	487.0	485.0
900	1.6	900	1232	1020	505	1125	1050	28	39	589.0	587.0
1000	1.0	1000	1232	1120	505	1230	1160	28	36	579.0	577.0
1000	1.6	1000	1232	1120	505	1255	1170	28	42	779.0	777.0

1) Other pressure levels can be provided according to user requirements.

2) When the grounding method is the grounding electrode (standard configuration), the DN125-1000 caliber and size L remain unchanged.

3) LDC41/LDC48 split converter

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