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Measuring principle
Level radar
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Characteristic / Application
Lens antenna, 80GHz: High precision measurement for for storage tanks up to 30 m (98ft)
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Specialities
Custody transfer level measurement
Measurement close to tank wall -
Supply / Communication
85-264VAC
52-74VAC
19-64VDC -
Accuracy
up to 0.5 mm
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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 / max. overpressure limit
Vacuum…..16 bar abs
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Main wetted parts
316L, PTFE
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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, WM550
HART, BPM and TRL/2 (via GE option)
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) -
Certificates / Approvals
ATEX, FM, IEC Ex, EAC, JPN Ex, KC Ex,
INMETRO, NEPSI, UK Ex -
Safety approvals
Overfill protection WHG
SIL -
Design approvals
EN 10204-3.1
NACE MR0175, MR0103
AD2000 -
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 -
Application limits
Maximum measuring range is
dependent on the tank form and/
or application
Strong condensate or build-up
formation
Field of application
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 80 GHz transmitting frequency produces a sharply focused beam angle of 3° and avoids obstacles even close to tank wall.
80GHz 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 +170°C (-40 to +338°F)
Pressure: Vacuum to +16bar (Vacuum to +232psi)
Maximum measuring range: 70m (230ft)
Accuracy: ±0.5mm (±0.02″)
Transmitting frequency: 80GHz
International explosion protection and custody transfer certificates, overfill prevention WHG, SIL
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 80GHz technology for narrow beam angle for sharper focus, without interference from tank wall and obstructions