Emerson Rosemount 8711 Wafer Magnetic Flow Meter Sensors
• Type: Wafer-style magnetic flow meter sensor
• Line Sizes: ½″ to 8″ (15 mm to 200 mm)
• Accuracy: ±0.25% of rate (with transmitter)
• Flow Range: Up to 12 m/s (39.4 ft/s)
• Conductivity Requirement: ≥5 µS/cm
• Flange Compatibility: ASME, DIN, and JIS
• Protection Class: IP68 (optional for buried or submerged installations)
• Mounting: Compact wafer design for tight spaces
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Description
Flow Measurement Performance
• Accuracy:
o ±0.25% of flow rate with appropriate transmitter (e.g., Rosemount 8712/8732)
o Repeatability: ±0.1% of reading
• Flow Velocity Range:
o 0.01 to 12 m/s (0.03 to 39.4 ft/s), bi-directional flow measurement
• Conductivity:
o Minimum 5 µS/cm for accurate flow measurement
Mechanical Specifications
• Line Sizes: ½″ to 8″ (15 mm to 200 mm)
• Liner Materials: PTFE, ETFE, Polyurethane, Neoprene (select based on fluid compatibility)
• Electrode Materials: 316L Stainless Steel, Hastelloy C, Tantalum, Titanium
• Body Material: Carbon steel or stainless steel wafer body
• Flange Compatibility: Designed to fit standard wafer-style ANSI/ASME, DIN, JIS flanges
• Coil Drive: Pulsed DC coil, with typical coil resistance 7–16 Ω
• Construction: Fully welded design with hermetically sealed coils and epoxy encapsulation for reliability
• Ingress Protection: IP68 rating available for fully submersible or buried installations
Operating Conditions
• Process Temperature:
o Typically from –40°C to 120°C (–40°F to 248°F), depending on liner and electrode materials
• Pressure Ratings:
o Typically up to 150 psi (10 bar), varies with flange and liner selection
• Mounting Orientation:
o Can be installed in horizontal or vertical piping; best practice includes upstream and downstream straight pipe runs
Electrical and Interface
• Signal Output: Compatible with Rosemount 8700 Series transmitters (8712, 8732, 8742) for 4–20 mA, HART, FOUNDATION Fieldbus, or PROFIBUS communication
• Power Supply: Supplied through the transmitter
• Diagnostic Features:
o Electrode insulation monitoring
o Coil drive monitoring
o Ground noise detection (with compatible transmitters)
Installation and Maintenance
• Compact wafer design: Allows quick installation between standard flanges without special supports
• Replaceable terminal block: Simplifies wiring and maintenance
• Maintenance-free: No moving parts; robust design minimizes downtime and service costs
• Gasket: Use flat gaskets recommended for wafer meters to avoid distortion or leakage
Certifications and Approvals
• Complies with international standards including IEC, ANSI, DIN
• Suitable for use in hazardous areas with appropriate transmitter certification (optional)
• Optional sanitary versions available for food, beverage, and pharmaceutical industries
