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Criteria for selection of flowmeterEach method for measuring flow has specific properties, and each flow measuring point is characterized by specific requirements. The table shown below compares the properties of the various measuring instruments and thus provides assistance in selection of the optimum device. This section of the field device catalog includes the following instruments for measuring flow: - Electromagnetic
- Coriolis mass flow
- Ultrasonic
- Vortex volumetric- and mass flow
- Variable area meter
- Orifice plate
Measurement principle | Electromagnetic | Coriolis | Ultrasonic (inline) | Ultrasonic (clamp-on) | Vortex | Variable area meter | Orifice plate |
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Medium | Liquid (conductive) | Liquid or gas | Liquid | Liquid or gas | Steam/vapor, gases, liquid | Liquid or gas | Liquid, vapor, gas | Nominal diameter | DN 2 … 2000 (0.08” … 78”) | 1.5 … 150 mm (0.06” … 6”) | DN 50 ... DN 3000 (2" ... 120") | 6.4 mm ... 9.14 m (0.25" ... 360") | DN 15 … 300 (½" … 12") | DN 10 … 100 (0.4” … 4”) G½” … G3” | DN 10 … 1000 (0.4” … 40”) | Temperature range | °C (°F) | -40 … +200 (-40 … +392) | -50 … +180 (-58 … +356) | -20 ... +200 (-4 ... +392) | -40 ... +120 (-40 ... +248) | -40 ... +240 (-40 ... +464) | -20 … +300 (-4 … +572) | -200 … +500 (-328 … +932) | Max. pressure | bar (psi) | 160 (2 320), optional higher | Up to 410 (Up to 5 950) | 40 (580) | Unlimited | 100 (1 450) | 100 (1 450) | 315 (4 569) | Accuracy | % | ± 0,25 or ± 0,4 | ± 0,1 or ± 0,15 | ± 0,5 … ± 2 | 0,5 ... 1,0 % of flow, for velocities greater than 0,3 m/s (1 ft/s) | ± 0,75 … ± 1 | ± 1.6 ... ± 2.0 | ± 0,5 … ± 2 | Repeatability | % | 0,1/0,2 | 0,05 | 0,25 | 0,15% of flow, for velocities greater than 0,3 m/s (1 ft/s) | 0,1 | 0,5 | 0,5 | Dynamic response range | | 1:100 | 1:100 | 1:100 | 1:100 | 1:25 | 1:10 | 1:6 | Start-of-scale value | m/s (ft/s) | 0 (0) | 0 (0) | 0,1 (0.33) | 0 (0) | 0,4 (1.31) 2,0 (6.56) | 0,2 (0.66) | Re > 500 | Full-scale value | | | | | ± 36/120 | | | Re < 108 | | m/s (ft/s) | 0,25 … 10 (0.825 … 32.8) | 10 (32.8) | 10 (32.8) | ± 12/40 | 10 (32.8) | 3,5 (11.4) | 3 (9.8) | | m/s (ft/s) | | Approx. 300 (1000) | | ± 12/40 | 80 (262.5) | 60 (197) | 50/25 (164/82) | Measured values | Volume flow | • | • | • | • | • | • | • | Sound velocity | | | • | • | | | | Sound amplitude | | | • | • | | | | Density | | • | | • | | | | Mass flow | | • | • | • | • | | | Bidirectional measurement | • | • | • | • | | | • | Use | | • | • | • | • | | | | | • | • | | • | | | | | mPa·s (cp) | 0,1 … 100 000 (0.1 … 100 000) | 0 ... 100 000 (0 ... 100 000) | 0 ... 350 (0 ... 350) | 0,5 ... 2800 (0.5 ... 2800) | 0 … 10 (0 … 10) | 0,5 … 100 (0.5 … 100) | 0 … 10 (0 … 10) | Power supply | Mains or battery | Mains | Mains or battery | 90... 240 V AC, 50...60 Hz, 15 VA or 9 ... 36 V DC, 10 W | 2-wire | non | 2-wire |
Communication solutionsProduct | HART | PROFIBUS PA | PROFIBUS DP | FOUNDATION Fieldbus H1 | DeviceNet | Modbus RTU | GSM/GPRS |
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SITRANS F M MAG 5000 | • 1) 2) 4) | | | | | | | SITRANS F M MAG 6000 | • 1) 2) 4) 5) | • 1) 5) 6) 7) | • 1) 5) 6) 7) | • 2) 4) 5) | • 5) | • 1) 5) 10) | | SITRANS F M MAG 5000/6000 CT8) | | | | | | | | SITRANS F M MAG 6000 I | • 1) 2) 4) 5) | • 1) 5) 6) 7) | • 1) 5) 6) 7) | • 2) 4) 5) | • 5) | • 1) 5) 10) | | SITRANS F M MAG 6000 I Ex | • 1) 2) 4) 5) | •1) 5) 6) 7) | | • 2) 4) 5) | | | | SITRANS F M TRANSMAG 2 | • 1) 4) | • 1) 6) | | | | | | SITRANS F M MAG 8000 | | | | | | • 1) 3) 10) 11) 12) | • 14) | | | | | | | | | SITRANS F C FCT030 | • 1) 2) 4) 8) | | | | | | | SITRANS F C MASS 6000 | • 1) 2) 4) 5) | • 1) 5) 6) 7) | • 1) 5) 6) 7) | • 2) 4) 5) | • 5) | • 1) 10) | | SITRANS F C MASS 6000 Ex d | • 1) 2) 4) 5) | • 1) 5) 6) 7) | | • 2) 4) 5) | • 5) | | | SIFLOW FC070 | | | • 13) | | | • 1) 10) 11) | | | | | | | | | | SITRANS FUS060 | • 1) | • 1) 6) | | | | | | | | | | | | | | SITRANS FUS10109) | | | | | | • 9) 10) 11) | | | | | | | | | | SITRANS FX300 | • 1) | | | | | | | SITRANS FX330 | • 1) | | | | | | | | | | | | | | | SITRANS P DS III Differential pressure and flow | • 1) 2) | • 1) 2) 7) | | • 2) | | | |
1) Supports SIMATIC PDM 2) Supports AMS 3) Supports Siemens Flow Tool 4) Supports HH275/375 5) Pluggable add-on module 6) Profile 2 7) Profile 3 8) CT versions are not approved with communication modules. 9) All wall mount models 10) RS 485 11) RS 232 12) IrDA (Infrared) 13) Connected to ET200M PROFIBUS interface 14) Only with 7ME6810
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