Emerson Rosemount 8721 Hygienic Magnetic Flow Meter Sensors
Application: Hygienic/sanitary flow measurement (food, beverage, life sciences)
Line Sizes: ½″ to 4″ (15 mm to 100 mm)
Accuracy: ±0.25% of flow rate (±0.15% optional)
Flow Range: 0.04 to 12 m/s, bi-directional
Conductivity Requirement: ≥5 µS/cm
Process Connections: Tri-Clamp, DIN 11851, SMS, RJT (sanitary fittings)
Liner Material: FDA-compliant PTFE
Electrode Material: 316L SS, Hastelloy C, Tantalum (optional)
Body Material: 316L stainless steel with polished finish (Ra ≤ 0.76 µm)
Temperature Range: –20°C to +150°C (–4°F to +302°F)
Pressure Rating: Up to 16 bar (232 psi)
Ingress Protection: IP67 standard, IP68 optional
Certifications: 3-A, EHEDG, FDA-compliant materials
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Description
Flow Measurement Performance
• Accuracy:
o ±0.25% of flow rate (with compatible transmitter)
o Optional high-accuracy: ±0.15%
• Repeatability: ±0.1% of reading
• Minimum Conductivity: ≥5 µS/cm
• Flow Velocity Range: 0.04 to 12 m/s (0.13 to 39.4 ft/s), bi-directional
Mechanical Specifications
• Line Sizes: ½″ to 4″ (15 mm to 100 mm)
• Process Connections:
o Tri-Clamp (sanitary clamp)
o DIN 11851
o Optional: SMS and RJT fittings
• Liner Materials:
o PTFE (FDA compliant)
• Electrode Materials:
o 316L Stainless Steel
o Hastelloy C
o Tantalum (optional)
• Sensor Body:
o 316L stainless steel construction
• Surface Finish:
o Internally polished to Ra ≤ 0.76 μm (30 µin) or better (electropolished options available)
Operating Conditions
• Process Temperature Range:
o –20°C to +150°C (–4°F to +302°F), depending on liner and fitting
• Maximum Pressure:
o Up to 16 bar (232 psi), varies by connection and size
• Ingress Protection:
o IP67 as standard, IP68 optional (for washdown and immersion environments)
• Mounting Orientation:
o Horizontal or vertical; must remain full for accurate measurement
Electrical and Interface
• Compatible Transmitters:
o Rosemount 8700 Series (8712E, 8732E, 8742C)
• Electrical Connection:
o Terminal block with epoxy-sealed housing
o Cable entries per transmitter configuration
• Signal Output:
o 4–20 mA, HART, FOUNDATION Fieldbus, or PROFIBUS (through transmitter)
• Diagnostics:
o Grounding check, signal noise detection, coil integrity (with DA1/DA2 transmitters)
Certifications and Compliance
• Sanitary Standards:
o 3-A Sanitary Standard compliant
o EHEDG certified (European Hygienic Engineering & Design Group)
o FDA-compliant wetted materials
• Cleanability:
o Designed for CIP/SIP procedures
o Crevice-free, self-draining installation
• Pressure Equipment Directive (PED): Compliant
• Hazardous Location Approvals: Optional with transmitter
Installation & Maintenance
• Maintenance-Free:
o No moving parts; long-term stable performance
• Terminal Block:
o Replaceable for ease of wiring and maintenance
• Installation:
o Requires proper grounding and alignment; supplied with grounding rings or electrodes as needed
