Endress+Hauser Radar measurement Micropilot NMR81
- Brand: Endress+Hauser
- Type: NMR81
Drip-off lens antenna with 79 GHz transmitting frequency for custody transfer applications
Micropilot NMR81 is used for custody transfer and inventory control applications with NMi- and PTB-approvals and meets the requirements according to OIML R85 and API 3.1B. NMR81 is particularly suited for free space applications up to 70m. The drip-off lens antenna with 79 GHz transmitting frequency produces a sharply focused beam angle of 3° and avoids obstacles even close to tank wall.
Benefits
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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 ±0.5mm (±0.02")
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Developed according to international metrology recommendations such as OIML R85 and API MPMS
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Local and country-specific certifications like NMi or PTB for custody transfer applications
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Simplified installation and trouble-free operations due to easy connection to major DCS systems via open protocols
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79GHz technology for narrow beam angle for sharper focus, without interference from tank wall and obstructions
Field of application
79 GHz drip-off lens antenna suited for free space applications up to 70m offers high beam focusing for applications with nozzle situated close to tank wall.
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Process connections: Flanges
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Temperature: -40 to +200°C (-40 to +392°F)
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Pressure: Vacuum to +16bar (Vacuum to +232psi)
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Maximum measuring range: 70m (230ft)
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Accuracy: ±0.5mm (±0.02")
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Transmitting frequency: 79GHz
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International explosion protection and custody transfer certificates, overfill prevention WHG, SIL
| Measuring Principle | Level radar | |
| Characteristic / Application |
Lens antenna, 79GHz: 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 |
|
| 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 absolute / 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: 30 m (98 ft) |
|
| Communication |
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) |
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| Certificates / Approvals |
IEC Ex, ATEX, FM, |
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| Safety approvals |
SIL |
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| Metrological approvals and certificates |
OIML, NMi, PTB |
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| Options |
Redundant fieldbus Alu-coated or 316L housing Weather protection cover Adjustable mounting seals |
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| Application limits |
Maximum measuring range is dependent on the tank form and/ or application Strong condensate or build-up formation |
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