ELECTROMAGNETIC FLOW METER - MAGMETER






Introduction :
The electromagnetic flow meter virtually approaches the ideal flow meter suitable for wide range of liquid flow measurements even with very low conductivities. The meter offers no resistance to flow hence the pressure drop is almost negligible. The measurement being based on Faraday’s law of Electromagnetic induction, is independent of viscosity, density, pressure & temperature of flowing medium. The measurement is not affected by solid impurities as long as the min. conductivity of 5 s/cm is available. It is a true volumetric flow measurement. We offer various materials of construction for meter lining & electrodes to cover majority of corrosive liquids.

The Technique called as ‘pulsed DC’ is used which offers very high zero stability & accuracy of measurement. The standard current output of 4-20 mA DC is provided which is linearly proportional to volumetric flow rate & additional frequency output is also provided.
Magnetic Flow Meter

The method of flow measurement based on Faraday’s law of electromagnetic induction. When a conductor moves within a magnetic field, voltage is induced in it which is proportional to the velocity of conductor.
in this case the conductor is flowing media .the equation is as below.
E=B.v.d.
Where ,
E = Induced voltage [proportional to velocity]
B = Magnetic flux density
v = mean vcity of the media
d = Distance between the sensing electrodes
For a given size of flow tube & compatible am plifier the flux density ‘B’ is constant the distance the electrodes is constant. Hence, the induced voltage is proportional to the velocity of the flowing media. Thus the unit
can be calibrated in terms of volumetric flow rate by knowing the cross - sectional area of the tube

Principle Advantages
1. Use of pulsed DC magnetisation & auto zero technique offers excellent long term zero stability
2. Measurement is independent of velocity profile across the diameter of the pipe-line.
3. Measurement result are independent of density , viscosity, pressure temperature , soli-impurities& conductivity variation [above5 siemens]
4. No additional pressure drop across the meter which relieves the process designer while sizing his pumping requirement. Simple to install as no special precautions of straight pipe lengths required
5. Compatible with virtually all corrosive/ non- corrosive liquids .
6. Protection class offered IP65.
7. higher ratio of return on investment to investment.
8. Bath-tub curve remains flatter for very long period
Applications
This meter is more suitable with those fluids which present difficulties in handling. Fluids such as effluents, slurries pulps, brine and other highly corrosive liquids, acids and bases, fermenter wash, molasses etc. Following industries can find lot of application of this flow measurement technique.
 
Following industries can find lot of application of this flow measurement technique.
Effluent treatment plants
Water supply schemes
Steel & Aluminium
Chemical/Pharmaceutical
Food & Drugs
Sewage treatment plants
Sugar industries & Distilleries
Pulp & paper
Petrochemicals /fertilizers
Petrochemicals & Fertilizers.
Specifications
METERING TUBE : SROAT 1000
Meter size : DN 10 to DN 350 for higher size consult facory
Media Pressure : up to DN-100 to DN 200- Pn16 DN-250 to DN 350-PN 10
Media temperature : PTEF Liners 0-150 c max. For other Liners 0-90 c max.
Ambient Temperature Range: 0-50 c
Flanges Standard : ANSI / DIN /BS SMS/ Triclamp
Power Supply to filed coils : Plused DC
Materials :
pipe :
Electrode :
Liner :
Flanges :
Coil Housing :
ss 316 [non magnetic
ss 316 / Hastelloy C/Pt /Ta /Ti.
PTFE / Neoprene / soft Rubber /Hard Rubber.
carbon steel / ss 316 / ss 316 L /ss 304.
Carbon steel / ss, Epoxy Painted.

  TRANSMITTER SROAT 1000 A :
Type : Integral mounted [standard] Remote Mounted [on request]
Min. Media Conductivity : 5 s / cm [ for lower conductivities consult factory]
Signal Output : 4-20 mA dc isolated in max. 600 ohms.
Additional option : Pulsed output with adjustable count rate from 1 count / hr to 10 counts / Hr.[open collector with 100 mA / 24 dc capacity]
Singal output (cont.) Or
Frequency output :
0-10 Khz prop.To 0-100% flow rate [open colloctor with 10 mA/24 v dc max.]
Coil Excitation Frequency : Selectble by links
a) 25Hz
b)12.5Hz
c)6.25Hz
d)3.15Hz
Local Display : a)31/2 digit LCD calibrated in % engineering units
b) 8 digit LCD non resettable type for totalized quantity.
Flow Velocity Range : 0.1 m/s to 10 m/s
Accuracy : + 0.5% of reading [at ref. Conditions ]between 100%to 10% of calibrated range +0.75% of reading for flow rate between 10% to 5% [refer accuracy graf]
Ref. conditions : Power supply nominal. temperature 27 c+2 c
Repeatability : +0.2% of reading
Ambient temperature Drift : 0 50 c
Temperature drift : +0.015% per c max.
Material of Housing : Al. Die cast / ss 304 .
Power supply : 230 v ac/110v ac 50 Hz/24vdc.
Damping : Adjustable from 5 to 30 secs.
Cable Entries : 4 no. For remote amplier. 2 no. For integral amplier. ½ NPT/ 1/2 BSP/ pg4 [female] for Al. Die cast Housing 3/4 ET for ss 304 Housing
Ingress Protection : IP-65

  FLOW RATE TABLE : Flow Rate At V= 1m/s

DN M3 / Hr Lpm LPS
10
0.282
4.712
0.078
15
0.636
10.602
0.176
20
1.130
18.849
0.314
25
1.767
29.452
0.490
32
2.895
48.254
0.804
40
4.523
75.398
1.256
50
7.068
117.809
1.963
65
11.945
199.098
3.318
80
18.095
301.592
5.026
100
28.274
471.238
7.853
125
44.178
736.310
12.271
150
63.617
1060.287
17.671
200
113.097
1884.955
31.415
250
176.714
2945.243
49.087
300
254.469
4241.150
70.685

Ordering Information :

Flow Meter Size Order Code MS 03
MS 01
DN 10
MS 02
DN 15
MS 03
DN 20
MS 04
DN 25
MS 05
DN 32
MS 06
DN 40
MS 07
DN 50
MS 08
DN 65
MS 09
DN 80
MS 10
DN 100
MS 11
DN 125
MS 12
DN 150
MS 13
DN 200
MS 14
DN 250
MS 15
DN 300
MS 16
Any Other

Flange / End Connection Standards Order Code
FS 07
FS 01
DIN Pn40
FS 02
DIN PN 16
FS 03
DINPN 10
FS 04
ANSI 300
FS 05
ANSI 150
FS 06
SMS
FS 07
Tri-clamp
FS 08
Any other

Liner Material Order Code LM 02
LM 01
Teflon[PTFE]
LM 02
Neoprene
LM 03
Soft Rubber
LM 04
Hard Rubber
LM 05
Any other

Electrode Material Order Code EM 04
EM 01
Stainless steel 316
EM 02
Hastelloy C
EM 03
Tantalum
EM 04
Titanium
EM 05
Platinum
EM 06
Any other

Flange / End Connection Material Order Code FM 03
FS 01
Carbon steel
FS 02
Stainless steel 304
FS 03
Stainless steel 316
FS 04
Stainless steel 3161

Power Supply Order Code 01
01
110 + 10%V AC, 50 Hz
02
230 + 10%v AC ,50 Hz
03
24 Vdc+10%

Flow Transmitter Order Code FT 02
FT 01
Integral [ AL. Diecast]
FT 02
Remote [ AL. Diecast]
 
Copyright © 2011 Tansa Equipments Pvt. Ltd.. All Rights Reserved. Designed & Developed by Ananya Indranil Joshi