High-Accuracy Measurement for Tank Gauging
The Endress+Hauser Micropilot NMR84 is designed for high-accuracy, non-contact level measurement in stilling well applications. It is particularly suited to tank gauging where measurement accuracy, repeatability and recognized metrological requirements are important.
With accuracy of up to ±0.5 mm and a measuring distance of up to 50 m, the NMR84 is built for applications where level measurement plays an important role in inventory management and custody transfer.
Designed for Stilling Well Applications
The NMR84 uses a drip-off planar antenna operating at 6 GHz. This antenna design is specifically suited to stilling wells and is designed to reduce measurement errors caused by condensation build-up.
That makes the NMR84 a particularly practical choice when the tank installation calls for radar measurement through a stilling well rather than a conventional free-space arrangement.
Accuracy That Fits Tank Gauging Requirements
For applications where small differences in measured level matter, the NMR84 provides accuracy up to ±0.5 mm.
The instrument is intended for custody transfer and inventory control and is available with metrological approvals including NMi and PTB. Endress+Hauser also states that the instrument meets relevant requirements according to OIML R85 and API 3.1B.
Built for Large Storage Tanks
The NMR84 supports measurement distances of up to 50 m, with flange connections from DN100 / 4" to DN300 / 12" and UNI-Flange options from DN150 / 6" to DN300 / 12".
Its process design supports pressures from vacuum to 25 bar abs. and process temperatures from -40 to +150°C, making it suitable for demanding industrial tank environments.
A Natural Fit for Custody Transfer
The NMR84 is more than a general-purpose level transmitter. Its design and certification options are centered around tank gauging, inventory control and custody transfer.
The combination of high measurement accuracy, metrological approvals and dedicated stilling well antenna design makes it suitable for storage applications where the quality of the level measurement directly matters to the overall tank gauging system.
Flexible Integration with Tank Gauging Systems
The NMR84 provides several communication and input/output options for integration with existing plant and tank gauging systems.
Depending on configuration, communication options include Modbus RS485, V1, WM550, HART, BPM and TRL/2, together with 4–20 mA and relay outputs. It can also accept analog 4–20 mA, RTD and discrete inputs in supported configurations.
Designed for Long-Term Industrial Use
The NMR84 combines a robust industrial construction with international certifications for hazardous areas and tank safety. Main wetted parts are 316L and PTFE, while available approvals include ATEX, FM, IECEx, EAC, JPN Ex, KC Ex, INMETRO, NEPSI and UK Ex.
WHG overfill protection and SIL options are also available.
Key Features
- 6 GHz radar technology
- Accuracy up to ±0.5 mm
- Maximum measuring distance up to 50 m
- Designed specifically for stilling well applications
- Drip-off planar antenna helps reduce condensation-related measurement errors
- Designed for custody transfer and inventory control
- NMi and PTB metrological approvals
- Meets relevant requirements according to OIML R85 and API 3.1B
- Process pressure: vacuum to 25 bar abs.
- Process temperature: -40 to +150°C
- Flange connections from DN100 / 4" to DN300 / 12"
- Main wetted parts: 316L and PTFE
- Multiple communication options including Modbus RS485, V1, WM550 and HART
- International hazardous-area approvals
- WHG overfill protection and SIL options
Typical Applications
Custody Transfer
High-accuracy tank level measurement for applications where measured inventory is commercially relevant and recognized metrological requirements apply.
Tank Inventory Control
Suitable for continuous level measurement in storage tanks where accurate inventory information is important for operations and stock management.
Stilling Well Tank Gauging
The planar antenna and 6 GHz radar design make the NMR84 particularly suited to installations using stilling wells.
Large Storage Tanks
With measurement distances up to 50 m and large flange connection options, the NMR84 fits a wide range of industrial storage tank installations.
Oil & Gas and Chemical Storage
A suitable choice for tank gauging systems where accurate measurement, hazardous-area certification and established communication interfaces are required.
FAQ
What is the Endress+Hauser Micropilot NMR84 used for?
The NMR84 is primarily designed for custody transfer and inventory control, with a particular focus on stilling well applications.
What is the measuring accuracy of the NMR84?
The NMR84 provides accuracy of up to ±0.5 mm.
What is the maximum measuring distance?
The maximum measuring distance is 50 m. Endress+Hauser also specifies 50 m for calibration to regulatory standards.
What radar frequency does the NMR84 use?
The NMR84 uses a 6 GHz transmitting frequency and a drip-off planar antenna.
Why is the NMR84 suitable for stilling wells?
Its drip-off planar antenna is specifically designed for stilling well applications and helps avoid measurement errors caused by condensation build-up.
Is the NMR84 suitable for custody transfer?
Yes. The NMR84 is designed for custody transfer and inventory control applications and is available with NMi and PTB metrological approvals. Endress+Hauser states that it meets relevant requirements according to OIML R85 and API 3.1B.
What process conditions can the NMR84 handle?
The official specifications list a process temperature range of -40 to +150°C and process pressure from vacuum to 25 bar abs.
