SH-LDG Series Electromagnetic Flowmeter
Desription
The electromagnetic flowmeter is composed of two parts by electromagnetic flow sensor and electromagnetic flow converter. The operation of an electromagnetic flowmeter is based on Faraday law of electromagnetic induction. The mainly parts of the sensor are: measuring tube electrode poles, excitation coil, iron core, yoke and housing. The measuring tube of the sensor is a short alloy tube whose diameter is D, the inner surface of it has an insulating liner. Two electrodes are fixed in the measuring tube along with the diameter direction of it and they usually flush with the inner surface liner. When excitation coil pulsed by two-way square wave, there generates a working magnetic field with a flux density B in the vertical direction of the measurement axis. In the meantime, if some electrical conductivity liquid flows at an average velocity V through the measuring tube, cuts lines of the magnetic field, there generates induced electromotive force E. Electromotive force E is directly proportional to the product of flux density B, measuring tube diameter D and average velocity V, that's: E BVD. Electromotive force E (flow signal) is measured by the electrodes and transmitted to transducer through cable. After the transducer handles the flow signal by magnifying it, the flow and total amount can be displayed, also will output pulse and analog current etc.
Product Type Selection
SH-LDG __________ __________ __________ __________ __________ __________ __________ __________ __________ __________ __________
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a. Connect Type A. Flange Connection B. Clamping Connection |
f. Shell Protection 1. IP65 2. IP68+IP65 (IP68 sensor+IP65 converter)(c Only Can Select 2, 3; g Only Select 0; i Only Select 01, 02) 3. IP67 (c Only Select 2,3; g Only Select 0; i Only Select CH; k Only Select 02) |
| b. Nominal Bore (mm) Code DN Code DN Code DN 015 15 250 250 10A 1000 020 20 300 300 12A 1200 025 25 350 350 14A 1400 040 40 400 400 6A 1600 050 50 450 450 18A 1800 065 65 500 500 20A 2000 100 100 600 600 22A 2200 150 150 700 700 24A 2400 |
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| g. Explosion-proof Mark 0. Nothing 1. Integrated Type (f Only Select1, k Only Select 03) 2. Seperated Type (f Only Select1, k Only Select 02) |
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| h. Accessory 1. Nothing 2. Grounding Type (DN25~DN3000) 3. Grounding Ring (DN15~DN3000) 4. Electrode Scraper Structure (DN80~DN3000) |
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| c. Nominal Pressure (MPa) 0.6 0.6 (DN700~DN3000) 10 1.0 (DN15~DN1000) 16 1.6 (DN15~DN600) 40 4.0 (DN15~DN150) xx for Special Order |
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| i. Structure CR Divided Type CH Intergrated Type |
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| j. Power Supply 1. 85~265V AC 45~400Hz 2. 16~40V DC 3. Lithium Battery |
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| d. Lining Material 1. FTFE (F4) (DN15~DN1000) 2. Polychloroprene (DN15~DN3000) 3. Polyurethane (DN15~DN600) 4. FEP (F46) (DN15~DN250) 5. Screened PFA (DN50~DN250) |
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| k. Converter Type 01. Square separated type / single current/ dipluse/ double knock 02. Round separated type / single current / dipluse / double knock 03. Round integrated type / single current/single pulse / double knock 04. Square integrated type / single current/single pulse / doubleknock Notes: 1. Communication protocol: RS232, RS485. HART optional 2. Batch control function optional 3. GPRS remote monitoring function optional |
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| e. Electode Material 1. Stainless Steel 0Cr18Ni12Mo2Ti 2. HastelloyB 3. HastelloyC 4. Titanium 5. Platinum-iridum Alloy 6. Tantalum |
Main Technical Parameters
| Carried Standard | ANSI / DN / JIS | ||||
| DN | 3.6.10.15.20.25.32.40.50.65.80.100.125.150.200.250.300.350.400.450.500. 600.700.800.900.1000.1200.1400.1600.1800.2000.2200.2400.2600.2800.3000 |
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| Max.Flow Velocity | 15m/s | ||||
| Accuracy | ±0.5% of Indicating Value (Flow Velocity 0.8m/s); ±4mm/s (Flow Velocity<0.8m/s) | ||||
| Fluid Conductivity | ≥5uS/cm | ||||
| Nominal Pressure | 4.0 MPa | 1.6 MPa | 1.0 MPa | 0.6MPa | 6.3,10 MPa |
| DN3~DN15 | DN15~DN600 | DN200~DN1000 | DN700~DN3000 | Special Ordering | |
| Lining Material | PTFE, Poly Neoprene, Polyurethane, F46, PFA with net | ||||
| Sensor | -25 deg.C~+60 deg.C | ||||
| Convertor and Integrated Type | -10 deg.C~+60 deg.C | ||||
| Fluid Max. Temperature | Integrated Type | 70 deg.C | |||
| Separated Type | Poly Neoprene Lining | 80 deg.C; 120 deg.C (Notes in Order) | |||
| Polyurethane Lining | 80 deg.C | ||||
| PTFE Lining | 100 deg.C; 150 deg.C (Notes in Order) | ||||
| PEP Teflon | |||||
| PFA with Net | |||||
| Material of Signal Electrode and Ground Electrode | SS316L, Hastelloy B, Hastelloy C, Ti, Ta, Platinum-iridium Alloy, Stainless Steel Coating with Tungsten Carbide |
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| Electorde Drawknife Apparatus | DN80~DN3000 | ||||
| Connection Flange Material | Carbon Steel | ||||
| Connection Ring Material | Stainless Steel 1Cr18Ni9Ti | ||||
| Enclosure Protection | ND15~DN3000 Separated Sensor with Rubber or PU Lining | IP65 or IP68 | |||
| Integrated (Rounded Converter) | IP65 | ||||
| Other Sensors and Separated Converter | IP65 | ||||
| Explosion Proof Sensor and Converter | IP65 | ||||
| Spacing (Separated Type) | Normally the Separation Distance between Converter and Sensor Is Less Than 100m, if More Please Order Specially. (Note: Our Company Provide 10m Length Standardly, if Need More, Please Indicate the Length In Order, and the Cost Will be Add More) |
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| Output of Analog Current | 0~10mA Load Resistance 0~1.5Ω | ||||
| 4~20mA Load Resistance 0~750Ω | |||||
| Frenquency Output | 1~5000HZ | ||||
| Pulse Output | Separated Type Output by Two Way. Forward and Reverse Flow; Integrated Type Output One Way | ||||
| Frenquency Range 0~5KHz, Uper Limit 1~5 Optionally | |||||
| Square Wave or Pulse with 25ms Pulse Width | |||||
| Transistor Switch Output with Isolation Protection, can Absorb 250mA Current and Withstanding 35V Voltage |
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| Two-path Alarm Output | Alarmable (Programable) High / Low Flow, Blank Pipe, Fault Condition, Forward and Reverse Flow, Simulation Volume Exceeds Range, Pulse Volume Exceeds Range, Disconnect Pulse Small Signal |
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| Transistor Switch Output with Isolation Protection, can Absorb 250mA Current and Withstanding 35V Voltage (Not Isolated with Pulse Output) |
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| Digital Communications | RS232, RS485, HART (Add Specially) | ||||
| Explosion Proof Mark | Integration Exdeia I CT4 | ||||
| Separated Exd[ia] Il CT4 (Converter) Exdeia IICT4 (Sensor) | |||||
Keywords: SH-LDG Series Electromagnetic Flowmeter
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