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Tank gauging Tank Side Monitor NRF81

Field gateway for tank sensor operation, monitoring and integration into inventory control system

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Tank gauging Tank Side Monitor NRF81

Field gateway for tank sensor operation, monitoring and integration into inventory control system

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Benefits

  • Hardware and software developed according to IEC 61508 up to SIL3 (in homogeneous redundancy) for high level of safety
  • Intrinsically safe power supply and communication for Micropilot and Levelflex radar level devices
  • Simplified installation and trouble-free operations due to easy connection to major DCS systems via open protocols
  • Approved for use in explosion-hazardous areas
FLEXible answers to individual needs
Current product

Tank gauging Tank Side Monitor NRF81

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  • Specialized products
  • Designed for demanding applications

What is FLEX?

FLEX selections
Technical excellence
Simplicity
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Fundamental selection Meet your basic measurement needs
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Lean selection Handle your core processes easily
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Extended selection Optimize your processes with innovative technologies
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Xpert selection Master your most challenging applications
Variable
Manufacturer's warranty

Engineered for confidence

Our instruments are designed for long‑lasting performance, precise measurement, and dependable operation in demanding industrial environments. Each product includes a standard manufacturer’s warranty that reflects our commitment to quality and to the trust you place in our solutions.

Should a warranty case occur, the device will be assessed and the applicable remedy will be provided in line with the warranty terms – helping ensure a reliable and efficient resolution and supporting continued operation of your measurement point.

Request for extended warranty

If you require extended warranty coverage, simply contact your local Endress+Hauser representative. Our experts will advise you on the available options to match your application and risk profile, helping you protect your investment, reduce unexpected repair costs, and ensure reliable long‑term operation beyond the manufacturer's warranty period.

Learn more

Warranty terms apply

The manufacturer's warranty and extended warranty are subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

Services by your side

Right‑first‑time commissioning, worldwide

Endress+Hauser’s qualified service engineers ensure your measurement devices are commissioned right the first time, delivering application‑aligned accuracy, regulatory compliance, and operational confidence from startup onwards, anywhere in the world.

Remote support you can trust wherever you operate

With Endress+Hauser Smart Support, you benefit from faster issue resolution, higher uptime, reliable global expertise across the entire product lifecycle – and lasting peace of mind.

Committed to long‑term, sustainable performance

With deep field expertise, harmonized processes, and continuous monitoring, we accompany you with comprehensive service offerings – from initial start‑up through instrumentation maintenance to process optimization – as a true lifetime partner delivering improved outcomes.

For additional information, please contact your local Endress+Hauser representative.

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Personalized transaction space

Check prices and delivery times, save your favorite products, create quotes and place orders in just a few clicks and track deliveries at any time. With access to your complete order and quote history including all relevant documents you benefit from full transparency throughout the entire process.

Easy access to technical documentation

Select and download all technical documentation such as operating manuals, calibration certificates, approvals and CAD drawings conveniently bundled as a complete documentation package for your entire order or quote.

My Endress+Hauser – all in one place

My Endress+Hauser is your 24/7 connection to Endress+Hauser – in the office, in the field or on the go. It brings together transaction management, documentation and software downloads, knowledge base access, customer support, engineering tools and cloud‑based IIoT services helping you work easier, faster and more efficiently.

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Product information

Tank Side Monitor NRF81
Tank gauging - Tank Side Monitor NRF81
Specifications
Measuring / Application task Continuous / Liquids
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Description

The Tank Side Monitor NRF81 is a sensor integration and monitoring unit for bulk storage tank gauging applications. It integrates various level, temperature and pressure tank sensor data into a control host system. Various selectable alarms and outputs.

Field of application

For power supply and signal transmission of the connected devices. Parameterization of the connected devices and display of the measured values. Tank calculations for accurate correction of the tank distortions. Weights & Measure-approved for use in custody transfer applications.

  • Output: Modbus EIA485 (RS485), Sakura V1
  • Temperature: -40 to 60°C (-40 to 140°F)
  • International explosion protection certificates
Benefits
  • Hardware and software developed according to IEC 61508 up to SIL3 (in homogeneous redundancy) for high level of safety
  • Intrinsically safe power supply and communication for Micropilot and Levelflex radar level devices
  • Simplified installation and trouble-free operations due to easy connection to major DCS systems via open protocols
  • Approved for use in explosion-hazardous areas
Downloads
Most downloaded
Technical Information (TI)
TI Tankside Monitor NRF81 Tank Gauging
English version - 03/2024
Download
Operating Instruction (BA)
BA Tankside Monitor NRF81 Tank Gauging
English version - 03/2024
Download
Device Parameter (GP)
GP Tankside Monitor NRF81 Tank Gauging
English version - 03/2024
Download
The CAD Drawings will be available after the configuration.
All downloads
78 Downloads
Technical Information (TI)
Most downloaded
TI Tankside Monitor NRF81 Tank Gauging
English version - 03/2024
Download
Operating Instruction (BA)
BA Tankside Monitor NRF81 Tank Gauging
English version - 03/2024
Download
Device Parameter (GP)
GP Tankside Monitor NRF81 Tank Gauging
English version - 03/2024
Download
Short Instruction (KA)
KA Tankside Monitor NRF81 Tank Gauging
English version - 03/2024
Download
Installation Instructions (EA)
Display set, display holder Installation Instructions Micropilot NMR8x; Proservo NMS8x; Tankside Monitor NRF81
English version - 11/2016
Download
Installation Instructions (EA)
Terminal set Installation Instructions Micropilot NMR8x; Proservo NMS8x; Tankside Monitor NRF81
English version - 11/2016
Download
Installation Instructions (EA)
SD card with holder Installation Instructions Micropilot NMR8x; Proservo NMS8x; Tankside Monitor NRF81
English version - 09/2017
Download
Installation Instructions (EA)
Housing filter Installation Instructions Micropilot, Proservo, Tankside Monitor
English version - 02/2018
Download
Installation Instructions (EA)
Cover, cover clamp, O-ring Installation Instructions Microwave Level Measurement
English version - 12/2018
Download
Installation Instructions (EA)
I/O module, electronics mainboard, frontplane assembly, labelled Installation Instructions Micropilot NMR8x; Proservo NMS8x; Tankside Monitor NRF81
English version - 08/2018
Download
Installation Instructions (EA)
Electronic box Installation Instructions Micropilot NMR8x; Proservo NMS8x; Tankside Monitor NRF81
English version - 07/2018
Download
Ex Safety Instruction (XA)
XA Tankside Monitor NRF81 Ex db [ia Ga] IIC T6 Gb
English version - 02/2026
Download
Ex Safety Instruction (XA)
Tank Side Monitor NRF81 Ex db [ia Ga] IIC T6 Gb
English version - 03/2022
Download
Ex Safety Instruction (XA)
XA Tank Side Monitor NRF81 Ex db [ia Ga] IIC T6 Gb
English version - 06/2023
Download
Ex Safety Instruction (XA)
Tankside Monitor NRF81 II 2 (1) G Ex db [ia Ga] IIC T6 Gb
English version - 06/2021
Download
Ex Safety Instruction (XA)
Tankside Monitor NRF81 CA:
XP / I / 1 / BCD / T6
I / 1 / Ex db [ia Ga] IIC / T6 Gb; Entity
AIS / I, II, III / 1 / ABCDEFG; Entity
ANI / I / 2 / ABCD;NIFW
US:
XP / I / 1 / BCD / T6
I / 1 / AEx db [ia Ga] IIC / T6 Gb; Entity
AIS / I, II, III / 1 / ABCDEFG; Entity
ANI / I / 2 /ABCD; NIFW
English version - 10/2020
Download
Ex Safety Instruction (XA)
XA Tank Side Monitor NRF81 1Ex db [ia Ga] IIC T6 Gb X
English version - 11/2024
Download
Ex Safety Instruction (XA)
XA Tankside Monitor NRF81 Ex db [ia Ga] IIC T6 Gb
English version - 07/2026
Download
ZE (Certificate)
Tankside Monitor NRF81 Baumusterprüfbescheinigung
DE-17-M-PTB-0072, Rev. 1
German version - 05/2019
Download
ZE (Certificate)
Zulassungszertifikat CH-L-19131-00 Tankside Monitor NRF81 Eidgenössisches Institut für Metrologie METAS
Zulassungszertifikat CH-L-19131-00
Tankside Monitor NRF81
German version - 06/2019
Download
ZE (Certificate)
Tankside Monitor NRF81 NMi Test certificate TC8909 revision 2
NMi
English version - 02/2019
Download
Special Documentation (SD)
SD NMR8x, NMS8x, NRF8x Tank Gauging
WM550 Protocol
English version - 03/2024
Download
Special Documentation (SD)
SD Cable gland M20 Ex d for the Japanese market
English version - 09/2024
Download
Special Documentation (SD)
RFID TAG Special Documentation RFID TAG
Special Documentation
English version - 08/2015
Download

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Spare parts and accessories

Sealing
Sealing

O-ring, housing, 177.39x3.53, TG

Sealing
Sealing
Order code 71312582
Drawing number 21
Filter
Filter

Housing filter, PTFE, NMS8x, NRF81, TG

Filter
Filter
Order code 71343171
Drawing number 19
Adapter housing/cable entry
Adapter housing/cable entry

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

Adapter housing/cable entry
Adapter housing/cable entry
Order code 71312592
Drawing number 14
Sealing
Sealing

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

Sealing
Sealing
Order code 71312594
Drawing number 15
Spare parts & accessories
Tank Side Monitor NRF81
Tank gauging - Tank Side Monitor NRF81

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Tank Side Monitor NRF81
Tank gauging - Tank Side Monitor NRF81
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CAD Drawings
Configuration support

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Add your product to the cart and request a quote. Whether it is un-configured, partially configured, or fully configured, our experts will contact you to complete the configuration and provide your quote.

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Spare parts and accessories

Sealing
Sealing

O-ring, housing, 177.39x3.53, TG

Sealing
Sealing
Order code 71312582
Drawing number 21
Filter
Filter

Housing filter, PTFE, NMS8x, NRF81, TG

Filter
Filter
Order code 71343171
Drawing number 19
Adapter housing/cable entry
Adapter housing/cable entry

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

Adapter housing/cable entry
Adapter housing/cable entry
Order code 71312592
Drawing number 14
Sealing
Sealing

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

Sealing
Sealing
Order code 71312594
Drawing number 15
Spare parts & accessories