توضیحات
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
- 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″)
- Developed according to international metrology recommendations such as OIML R85 and API MPMS
- Local and country-specific certifications like NMi or PTB for custody transfer applications
- Simplified installation and trouble-free operations due to easy connection to major DCS systems via open protocols
- 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.
- Process connections: Flanges
- Temperature: -40 to +200°C (-40 to +392°F)
- Pressure: Vacuum to +16bar (Vacuum to +232psi)
- Maximum measuring range: 70m (230ft)
- Accuracy: ±0.5mm (±0.02″)
- Transmitting frequency: 79GHz
- 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 |
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| 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) |
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| Process temperature | -40°C…200°C (-40°F…392°F) |
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| 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″ |
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| Max. measurement distance | 70 m (230 ft) For calibration to regulatory standards: 30 m (98 ft) |
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| Communication | Outputs: Fieldbus: Modbus RS485, V1, HART Analog 4-20mA output (Exi/ Exd) Relay output (Exd) Inputs: |
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| Certificates / Approvals | IEC Ex, ATEX, FM, | |
| Safety approvals | SIL | |
| Metrological approvals and certificates | OIML, NMi, PTB | |
| 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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