雷达液位计 NMR81
Technical Data
CompareContinuous / Liquids
| Measuring Principle | Level radar |
| Characteristic / Application | Lens antenna, 80GHz: 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 52-74VAC 19-64VDC |
| 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 / 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: 50 m (164 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 |
| 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 |
Micropilot NMR81 can be used for custody transfer and inventory control measurements and is certified by NMi and PTB, complying with the relevant requirements of R85 and API 3.1B. NMR81 is particularly suitable for measurement in free space with a maximum range of 70 m. It uses an 80 GHz droplet antenna with a small 3° beam angle, which prevents any obstacles close to the tank wall from affecting the measurement.
Advantages
Hardware and software design in accordance with IEC 61508, maximum safety SIL3 (in homogeneous redundant systems)
Maximum measuring accuracy of ±0.5 mm (±0.02"), therefore maximum reliability
Design complies with international metrology regulations, e.g. OIML R85 and API MPMS standards
Local and national certifications, e.g. NMi or PTB certification for custody transfer applications
Simple connection to higher-level DCS systems via open protocols, easy installation and trouble-free operation
80 GHz technology with a highly focused beam angle, unaffected by tank walls and other structures
Application
The 80 GHz droplet antenna is suitable for measurement in free space with a maximum range of 70 m, with a small beam angle, suitable for short nozzle applications close to the tank wall.
Process connection: flange
Temperature: -40...+200°C (-40...+392°F)
Pressure: vacuum...+16 bar (vacuum...+232 psi)
Measuring range: max. 70 m (230 ft)
Measuring accuracy: ±0.5 mm (±0.02")
Operating frequency: 80 GHz
International explosion protection and custody transfer certification, WHG overfill protection, SIL certification
Technical documentation
Technical data
Documents/Manuals/Software
Accessories/Spare parts
Source:Endress+Hauserwebsite public information
Case Studies
Municipal Wastewater Treatment — Wastewater Treatment Plant · Tank Farm Application Case
Project Background
Municipal Wastewater Treatment customers at the Wastewater Treatment Plant stage have long faced the challenge of insufficient accuracy in effluent quality monitoring and instruments prone to contamination causing data drift, affecting compliance discharge, placing higher demands on the stability and measurement accuracy of Tank Farm.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Tank Farm for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Municipal Wastewater Treatment conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Food & Beverage — Food Production Line · Tank Farm Application Case
Project Background
Food & Beverage customers at the Food Production Line stage have long faced the challenge of high hygienic measurement requirements, with inline instruments needing to withstand CIP/SIP cleaning while maintaining stable accuracy, placing higher demands on the stability and measurement accuracy of Tank Farm.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Tank Farm for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Food & Beverage conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Chemical & Pharmaceutical — Reactors and Storage Tanks · Tank Farm Application Case
Project Background
Chemical & Pharmaceutical customers at the Reactors and Storage Tanks stage have long faced the challenge of highly corrosive media and complex conditions, requiring corrosion-resistant and explosion-proof instruments, placing higher demands on the stability and measurement accuracy of Tank Farm.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Tank Farm for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Chemical & Pharmaceutical conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Power & Energy — Power Plant Boiler and Turbine · Tank Farm Application Case
Project Background
Power & Energy customers at the Power Plant Boiler and Turbine stage have long faced the challenge of unstable measurement under high temperature and pressure, with high maintenance and downtime costs, placing higher demands on the stability and measurement accuracy of Tank Farm.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Tank Farm for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Power & Energy conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
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