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Endress + Hauser NMS81 for liquid level, interface and density

ENDRESS + HAUSER high precision servo measurement instrument Proservo NMS81

Endress + Hauser Tank Side Monitor Proservo NMS81 is designed for high accuracy liquid level measurement in custody transfer and inventory control applications with NMi- and PTB-approvals.
Custody transfer level measurement, Interface measurement, spot density, density profile measurement.

Endress + Hauser NMS81 Tank gauging measuring principle:

Servo / Float Tank Gauging

Endress + Hauser NMS81 Tank gauging measuring range:

• Level and interface: Max.55 m (180.45 ft)(longer range is possible as special product)
• Density: 0.430 to 2.000 g/cm3
The level and interface measuring range depend on the measuring wire and material compatibility to measured medium. Measuring wires are available in three different standard materials. Material compatibility should be confirmed to ensure safe operation and optimal measuring performance.

Endress + Hauser NMS81 Tank gauging application:

Endress + Hauser NMS81 for high accuracy custody transfer measurement in crude oil, gasoline, diesel, petrochemicals and chemicals.

• Process connections: Flanges
• Temperature: -200 to +200°C (-328 to +392°F)
• Pressure: 0 to +25bar (0 to +362psi)
• Maximum measuring range: 47m (154ft)
• Accuracy: ±0.4mm (±0.02")
• International explosion protection and custody transfer certificates, overfill prevention WHG, SIL

Endress + Hauser NMS81 Tank gauging advantages:

• Hardware and software developed according to IEC 61508 up to SIL3 (in homogeneous redundancy) for high level of safety
• Maximum reliability through accuracy up to ±0.4mm (± 0.02")
• Developed according to international metrology recommendations such as OIML R85 and API MPMS
• Local and country-specific certifications like NMi or PTB for custody transfer applications
• Superior corrosion resistance with 316L materials in the process compatible with sour applications such as crude oil
• Measurement of interfaces between up to three liquid layers, tank bottom, spot, and profile densities
• Best fit for LNG/LPG applications without influence of dc value or Boil Off Gas

Endress + Hauser NMS81 Tank gauging Ambient temperature:

Standard: -40°C…60°C (-40°F...140°F)

For calibration to regulatory standards:
-25°C…55°C (-13°F...131°F)

Endress + Hauser NMS81 Tank gauging communication:

Outputs:
• Fieldbus: Modbus RS485, V1, HART
• Analog 4-20mA (Exi/Exd)
• Relay output (Exd)

Inputs:
• Analog 4-20mA (Exi/Exd)
• 2-, 3-, 4-wire RTD
• Discrete input (Exd, passive/ active)