NMR84 Radar Tank Gauge

NMR84 Radar Tank Gauge

The NMR84 Radar Tank Gauge (RTG), with an accuracy rate of ±0.5 mm and ideally suited for stilling well applications in custody transfers, is used for high accuracy, continuous, non-contact level measurement in bulk liquid storage tanks.

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Accuracy Approved for Custody Transfer

NMR84 RTG, with an accuracy level of ±0.5mm (0.02″), uses the drip-off planar antenna for stilling well applications. The drip-off planar antenna eliminates problems caused by condensation, and is designed for high accuracy liquid level measurement in storage and process applications.



Touch Screen Operations

Easy onsite operation using built-in touch control display without having to open the enclosure. It also has a user friendly operating menu.



Worldwide Approvals

Each radar gauge is approved for use in explosion hazardous areas to FM, IEC Ex and ATEX standards. It is also SIL 2 and SIL 3 certified.



Key Features

  • SIL2 and SIL3 certified (Min, Max, Continuous level)
  •  Up to 6 SIL relay outputs
  • Measures liquid level to an accuracy of ±0.5 mm (0.02 in)
  • Wetted parts are completely separated from the electronic circuit
  • Wide range of output signals including V1, MODBUS RS-485, HART protocol
  • Tank top mounting as small as 4″/DN100 flange
  • Interfaces to FuelsManager via the 8130 Remote Terminal Unit or 8300 series TankGate
  • Integration of HART instrumentation for temperature, water level, pressure, and overfill prevention sensor
  • Suitable for atmospheric and high pressure applications up to 25 bar/2.5 MPa (362 psi)
  • Robust IP66/68, NEMA Type 4x/6P enclosure
  • Direct connection of spot or average temperature sensor
  • Simplified installation and trouble-free operations due to easy connection to major DCS systems via open protocols
  • Approved for use in explosion-hazardous areas
  • User-friendly operating menu (multi-lingual)
  • Weights & Measure-approved for use in custody transfer applications
  • Unique drip-off antenna design eliminates measurement error due to condensation build-up
  • Tank side monitoring and operation can be performed by the remote display and operating module DKX001
  • Housing with electronics: approx. 12 kg (26 lb)
  • Sensor and process connection: 8.5 to 43 kg (19 to 95 lb); dependent on the device version

• Housing: Aluminum
• Antenna and Process Connection:
• 316L: Flange, Housing Adapter, Sensor Adapter, Antenna Retaining Ring, Antenna Extension
• PTFE: Planar Antenna
• FKM/HNBR/FFKM: Sealing Ring
• Rated IP66/68, NEMA Type 4x/6P enclosure

Flange Type
  • NPS ASME B16.5, 150 lb, 4″ to 10″
  • NPS ASME B16.5, 300 lb, 4″ to 8″
  • DN100/DN150, PN10/16 B1 and PN25/40 B1
  • DN200/DN250, PN16 B1
  • DN200 PN25 B1
  • UNI flange DN150/6″/150, max PN1/ Cl.14.5/1K, suitable for DN150 PN10/16, NPS 6″  Cl.150, 10K 150
  • UNI flange DN200/8″/200, max PN1/ Cl.14.5/1K, suitable for DN200 PN10/16, NPS 8″ Cl.150, 10K 200
  • UNI flange DN250/10″/250, max PN1/ Cl.14.5/1K, suitable for DN250 PN10/16, NPS 10″ Cl.150, 10K 250
  • UNI flange DN300/12″/300, max PN1/ Cl.14.5/1K, suitable for DN300 PN10/16, NPS 12″ Cl.150, 10K 300
Ambient Temperature
  • Device: -40 to +60°C (-40 to +140°F)
  • Display Module: -20 to +70°C (-4 to
Primary Output

• V1
• 4-20mA HART Ex d/XP, RTD input
• 4-20mA HART Ex i/IS, RTD input


Calibration Range: 30 m (98 ft)

Maximum Range: Depending upon configuration choices
0.8 to 20 m (2.6 to 66 ft)
0.8 to 30 m (2.6 to 98 ft)
0.8 to 40 m (2.6 to 131 ft)


FM, IEC Ex and ATEX approvals

See specifications document for more information.

Approvals & Certifications

FM, IEC Ex and ATEX approvals

SIL2 and SIL 3 certifications

Power Supply
  • High voltage type: 85 to 264 VAC, 50/60 Hz, 28.8 VA
  • Low voltage type: In preparation

Primary Output

  • Modbus RS485
  • V1
  • 4-20mA HART Ex d/XP, RTD input
  • 4-20mA HART Ex i/IS, RTD input

Secondary I/O Analogue

  • Ex d/XP, 1x 4-20mA HART, 1x RTD input
  • Ex d/XP, 2x 4-20mA HART, 2x RTD input
  • Ex i/IS, 1x 4-20mA HART, 1x RTD input
  • Ex i/IS, 2x 4-20mA HART, 2x RTD input
  • 1x Ex i/IS 4-20mA HART, 2x RTD input + 1x Ex d/XP 4-20mA HART

Secondary I/I Digital Ex D/XP

  • 2x relay / 2x module discrete
  • 4x relay / 4x module discrete
  • 6x relay / 6x module discrete
  • Modbus RS485
  • Modbus RS485 + 2x relay / 2x module discrete
  • Modbus RS485 + 4x relay / 4x module discrete



Transmitter Aluminum, coated, process 316/316L

  • Thread M20, IP66/68 NEMA Type 4X/6P Encl
  • Thread M25, IP66/68 NEMA Type 4X/6P Encl.
  • Thread G1/2, IP66/68 NEMA Type 4X/6P Encl.
  • Thread G3/4, IP66/68 NEMA Type 4X/6P Encl.
  • Thread NPT1/2, IP66/68 NEMA Type 4X/6P Encl.
  • Thread NPT3/4, IP66/68 NEMA Type 4X/6P Encl.
  • Planar 100mm/4″
  • Planar 150mm/6″
  • Planar 200mm/8″
  • Planar 250mm/10″
  • Planar 300mm/12″
  • English
  • German
  • Japanese

Contact Varec for more information or see technical specifications.


Radar Gauge Comparison Guide
Easy-to-follow guide that compares the FMR532, FMR50, FMR51, FMR52, FMR53, FMR54, FMR540, FMR60, FMR62, NMR81 and NMR84 radar gauges.

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Application Checklists

Radar Tank Gauging Checklist
Checklist for Radar Tank Gauging needs.
Temperature Tank Gauging Checklist
Checklist for Temperature Tank Gauging needs.

Technical Specifications

NMR84 Radar Tank Gauge Technical Specifications
Technical specifications for the NMR84 Radar Tank Gauge.


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NMR84 Radar Tank Gauge Manual
Please visit the Endress and Hauser website to access the parts and accessories information for the NMR84 Radar Gauge.
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