Radar measurement
Micropilot NMR81

Drip-off lens antenna with 80 GHz transmitting frequency for custody transfer applications

• Measuring principle

  Level radar

• Characteristic / Application

  Lens antenna, 80GHz: High precision measurement for for storage tanks up to 30 m (98ft)

• Specialities

  Custody transfer level measurement
  Measurement close to tank wall

• Supply / Communication

  85-264VAC
  52-74VAC
  19-64VDC

• Accuracy

  up to 0.5 mm

• Ambient temperature

  Standard:
  -40°C…60°C
  (-40°F...140°F)
  For calibration to regulatory
  standards:
  -25°C…55°C
  (-13°F...131°F)

• Process temperature

  -40°C...200°C
  (-40°F...392°F)

• Process pressure / max. overpressure limit

  Vacuum.....16 bar abs

• Main wetted parts

  316L, PTFE

• Process connection

  Flange:
  DN50/2"…DN300/12"
  Flange w/ Alignment tool:
  DN100/4"…DN300/12"
  UNI-Flange:
  DN150/6"…DN300/12"
  UNI-Flange w/ Alignment tool:
  DN150/6"…DN300/12"

• Max. measurement distance

  70 m (230 ft)
  For calibration to regulatory standards:
  50 m (164 ft)

• Communication

  Outputs:
  Fieldbus: Modbus RS485, V1, WM550
  HART, BPM and TRL/2 (via GE option)
  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)

• Certificates / Approvals

  ATEX, FM, IEC Ex, EAC, JPN Ex, KC Ex,
  INMETRO, NEPSI, UK Ex

• Safety approvals

  Overfill protection WHG
  SIL

• Design approvals

  EN 10204-3.1
  NACE MR0175, MR0103
  AD2000

• Metrological approvals and certificates

  OIML, NMi, PTB

• Options

  Redundant fieldbus
  Alu-coated or 316L housing
  Weather protection cover
  Adjustable mounting seals

• Application limits

  Maximum measuring range is
  dependent on the tank form and/
  or application
  Strong condensate or build-up
  formation