Servo tank gauging instrument
Proservo NMS81

Proservo NMS81 ©Endress+Hauser
Proservo NMS81 ©Endress+Hauser

High precision servo measurement for liquid level, interface and density

The intelligent tank gauge Proservo NMS81 is designed for high accuracy liquid level measurement in custody transfer and inventory control applications with NMi- and PTB-approvals. It meets the relevant requirements according to OIML R85 and API 3.1B. It fulfills the exact demands of tank inventory management and loss control and is optimized in regards of total cost saving and safe operation.

  • Benefits

    • 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...

  • Field of application

    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 (...

Features and specifications

Back

Details

  • Measuring principle

    Servo / Float Tank Gauging

  • Servo Tank Gauging: High precision measurement for liquid level, interface, spot density, profile density

  • 85-264 VAC

  • Standard:

    -40°C…60°C

    40°F...140°F)


    For calibration to regulatory

    Standards:

    -25°C…55°C

    (-13°F...131°F)

  • -200°C...200°C

    (-328°F...392°F)

  • up to 25 bar (363 psi) abs

  • 316L, AlloyC276, PTFE

  • Fieldbus: Modbus RS485, V1, HART

    Analog 4-20mA output (Exi/ Exd)

    Relay output (Exd)


    Inputs:

    Analog 4-20mA input (Exi/ Exd)

    2-, 3-, 4-wire RTD input

    Discrete input (Exd, passive/ active)

  • ATEX, FM, IEC Ex, NEPSI, EAC

  • Redundant fieldbus

    Alu-coated or 316L housing

    Weather protection cover

    Guide wire assembly

    Relief valve

    Gas purging nozzle connection

    Pressure gauge
    Cleaning nozzle connection

  • Custody transfer level measurement

    Interface measurement

    Spot density, density profile measurement

  • 47 m (154 ft)

  • OIML, NMi, PTB

  • Measuring principle

    Servo / Float Tank Gauging

  • Servo Tank Gauging: High precision measurement for liquid level, interface, spot density, profile density

  • Custody transfer level measurement

    Interface measurement

    Spot density, density profile measurement

  • 85-264 VAC

  • up to 0.4 mm

  • Standard:

    -40°C…60°C

    (40°F...140°F)


    For calibration to regulatory Standards:

    -25°C…55°C

    (-13°F...131°F)

  • -200°C...200°C

    (-328°F...392°F)

  • up to 25 bar (363 psi) abs

  • 316L, AlloyC276, PTFE

  • Flange:
    DN80/3" / DN100/4" / DN150/6"

  • 47 m (154 ft)

  • Outputs:

    Fieldbus: Modbus RS485, V1, HART

    Analog 4-20mA output (Exi/ Exd)

    Relay output (Exd)


    Inputs:

    Analog 4-20mA input (Exi/ Exd)

    2-, 3-, 4-wire RTD input

    Discrete input (Exd, passive/ active)

  • ATEX, FM, IEC Ex, NEPSI, EAC

  • EN 10204-3.1

    NACE MR0175, MR0103

  • OIML, NMi, PTB

  • Redundant fieldbus

    Alu-coated or 316L housing

    Weather protection cover

    Guide wire assembly

    Relief valve

    Gas purging nozzle connection

    Pressure gauge
    Cleaning nozzle connection

  • Stilling well or guide wires for turbulent
    application

    Recommend PTFE displacer for high
    viscosity application

    Recommend AlloyC276 displacer for corrosive application

    Interface measurement requires min. difference of 0.100 g/ml
    between layers

Documents / Manuals / Software

Accessories / Spare parts

Nr
Order code
Specification
  • 10
    • Nr 10 Order code 71273750

      Drum Housing Cover, 316L

      Drum housing cover made of 316L. Usage: Proservo NMS81.

  • 20
    • Nr 20 Order code 71273751

      Calibration window cover, 316L

      Calibration window cover made of 316L including glass and holder. Usage: Proservo NMS81.

  • 39
    • Nr 39 Order code 71273688

      Cable, mainboard to electronics, Servo

      Cable to connect platform mainboard to Proservo electronics. Usage: Proservo NMS80/81/83.

  • 50
  • 51
    • Nr 51 Order code 71273689

      Sensor module, Servo

      Electronics to set on the detector unit. Usage: Proservo NMS80/81/83.

  • 33,34,35,36
    • Nr 33,34,35,36 Order code XPN0031-

      I/O Module NMR81/84, NRF81, NMS80/81/83

      Usage: NRF81, NMR81/NMR84, NMS80/NMS81/NMS83.

  • 65
    • Nr 65 Order code 71319969

      Seal, HNBR, PTFE, FVQM,EPDM,NMS81/83

      HNBR: back cover, calibration window. FVQM: display cover. EPDM: goretex filter. Usage: Proservo NMS81/83.

    • Nr 65 Order code 71319974

      Seal, FKM, FVQM, EPDM, NMS81/83

      FKM: back cover, calibration window. FVQM: display cover. EPDM: goretex filter. Usage: Proservo NMS81/83.

    • Nr 65 Order code 71319977

      Seal, CR, FVQM, EPDM, NMS81/83

      CR: back cover, calibration window. FVQM: display cover. EPDM: goretex filter. Usage: Proservo NMS81/83.

    • Nr 65 Order code 71319980

      Seal, PTFE, FVQM, EPDM, NMS81/83

      PTFE: back cover, calibration window. FVQM: display cover. EPDM: goretex filter. Usage: Proservo NMS81/83.

    • Nr 65 Order code 71319987

      Seal, VMQ, FVQM, EPDM, NMS81/83

      VMQ: back cover, calibration window. FVQM: display cover. EPDM: goretex filter. Usage: Proservo NMS81/83.

  • 80
    • Nr 80 Order code 71273690

      Wire drum bracket, Alu

      Wire drum bracket made of aluminum. Usage: Proservo NMS80.

    • Nr 80 Order code 71273693

      Wire drum bracket, 316L

      Wire drum bracket made of 316L. Usage: Proservo NMS81.

    • Nr 80 Order code 71273744

      Wire ring, 316L

      Wire ring made of 316L to connect measuring wire with displacer. Usage: Proservo NMS80/81.

    • Nr 80 Order code 017800-0243

      Wire ring, AlloyC

      Wire ring made of AlloyC to connect measuring wire with displacer. Usage: NMS5/NMS7, NMS80/NMS81/NMS83.

    • Nr 80 Order code 71273746

      Wire ring, PTFE

      Wire ring made of PTFE to connect measuring wire with displacer. Usage: NMS80/81/83, NMS5/NMS7, TGM5.

  • 82
    • Nr 82 Order code 71273739

      Bearing, wire drum bracket, PTFE

      Bearing to support wire drum bracket made of PTFE. Usage: Proservo NMS80/81/83.

  • 86
    • Nr 86 Order code 71273740

      Measuring wire, 316L, 0.15mm dia., 60m

      Measuring wire made of 316L. 0.15mm diameter with 60m length. Usage: Proservo NMS80/81.

    • Nr 86 Order code 71273742

      Measuring wire, AlloyC, 0.2mm dia., 22m

      Measuring wire made of AlloyC 0.2mm diameter with 22m length. Usage: Proservo NMS80/81/83.

    • Nr 86 Order code 56004912

      Measuring wire, 16m, PFA>316L, 0.4 mm

      PFA coated 0.4 wire, 16m, PTFE O-ring. Usage: NMS5, TGM5.

  • 14
    • Nr 14 Order code 71312592

      Blind plug, M20, 316L, O-ring EPDM, TG

      Consists of: blind plug, O-ring 18.0x2.0. Usage: housing F35/36/37/38, NRF81, NMR81/NMR84, NMS80/NMS81/NMS83.

  • 65
    • Nr 65 Order code 71312594

      O-ring, blind plug, M20, EPDM, 5pcs., TG

      Usage: housing F35/36/37/38, NRF81, NMR81/NMR84, NMS80/NMS81/NMS83.

  • 20
    • Nr 20 Order code 71312596

      Front cover Alu, sight glas, gasket

      Material: aluminum. Consists of: cover, O-ring FVMQ, PTFE coated. Usage: housing F35/36, NRF81, NMR81/NMR84, NMS80/NMS81/NMS83.

    • Nr 20 Order code 71312607

      Front cover 316L, sight glas, gasket

      Material: 316L. Consists of: O-ring EPDM, clotted. Usage: housing F37/38. NMR81/NMR84, NRF81, NMS81/NMS83.

  • 17
    • Nr 17 Order code 71312627

      Cover clamp, 2 pcs., TG

      Usage: housing F35/36/37/38. NRF81, NMR81/NMR84, NMS80/NMS81/NMS83.

  • 40
    • Nr 40 Order code 71312638

      Display set, RS485, holder, TG

      Consists of: operation-module, A300, optical buttons, display holder, fixing ring, cover. Usage: NRF81, NMR81/NMR84, NMS80/NMS81/NMS83.

  • 41
    • Nr 41 Order code 71312640

      Display holder, fixing ring, TG

      Consists of: fixing ring, holder. Usage: NRF81, NMR81/NMR84, NMS80/NMS81/NMS83.

  • 37
    • Nr 37 Order code 71324756

      Terminal set, I/O module, Push-in, TG

      Consists of: complete terminal set. Usage: NRF81, NMR81/NMR84, NMS80/NMS81/NMS83.

    • Nr 37 Order code 71324757

      Terminal set, I/O module, screw type, TG

      Consists of: complete terminal set. Usage: NRF81, NMR81/NMR84, NMS80/NMS81/NMS83.

  • 88
  • 84
    • Nr 84 Order code XPN0006-

      Wire Drum assembly Proservo

      Usage: Proservo NMS80/81/83.

  • 31
    • Nr 31 Order code XPN0036-

      Electronics, mainboard

      Usage: NRF81, NMR81/NMR84, NMS80/NMS81/NMS83.