伺服罐表 NMS81
Technical Data
CompareContinuous / Liquids
| Measuring Principle | Servo / Float Tank Gauging |
| Characteristic / Application | Servo Tank Gauging: High precision measurement for liquid level, interface, spot density, profile density |
| Specialities | Custody transfer level measurement Interface measurement Spot density, density profile measurement |
| Supply / Communication | 85-264VAC 52-74VAC 19-64VDC |
| Accuracy | up to 0.4 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 | -200°C...200°C (-328°F...392°F) |
| Process pressure / max. overpressure limit | up to 25 bar (363 psi) abs |
| Main wetted parts | 316L, AlloyC276, PTFE |
| Process connection | Flange: DN80/3" / DN100/4" / DN150/6" |
| Max. measurement distance | 55 m (180 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 |
| Safety approvals | Overfill protection WHG SIL |
| Design approvals | EN 10204-3.1 NACE MR0175, MR0103 |
| Metrological approvals and certificates | OIML, NMi, PTB, LNE Calibration performed on accredited calibration facilities (acc.to ISO/IEC 17025) |
| Options | Redundant fieldbus Alu-coated or 316L housing Weather protection cover Guide wire assembly Relief valve Gas purging nozzle connection Pressure gauge Cleaning nozzle connection |
| Application limits | Stilling well or guide wires for turbulent application Recommend PTFE displacer for high viscosity application Recommend AlloyC276 displacer for corrosive application Interface measurement requires min. difference of 0.100 g/ml between layers |
Density
| Measuring Principle | Servo / Float Tank Gauging |
| Characteristic / Application | Servo Tank Gauging: High precision measurement for liquid level, interface, spot density, profile density |
| Supply / Communication | 85-264 VAC |
| 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 | -200°C...200°C (-328°F...392°F) |
| Process pressure | up to 25 bar (363 psi) abs |
| Wetted parts | 316L, AlloyC276, PTFE |
| Output | 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) |
| Certificates / Approvals | ATEX, FM, IEC Ex, NEPSI, EAC |
| Options | Redundant fieldbus Alu-coated or 316L housing Weather protection cover Guide wire assembly Relief valve Gas purging nozzle connection Pressure gauge Cleaning nozzle connection |
| Specialities | Custody transfer level measurement Interface measurement Spot density, density profile measurement |
| Measuring range | 47 m (154 ft) |
| Other approvals and certificates | OIML, NMi, PTB |
The Proservo NMS81 intelligent tank gauge is designed for high-precision level measurement in custody transfer and inventory control applications, and is certified by NMi and PTB. It complies with the relevant requirements of OIML R85 and API 3.1B standards. It satisfies the strict requirements of tank farm inventory management and loss control, and has been optimized for total cost savings and safe operation.
Advantages
Hardware and software design complies with IEC 61508, with maximum safety SIL3 (in homogeneous redundant systems)
Maximum measuring accuracy of ±0.4 mm (± 0.02"), resulting in maximum reliability
Design complies with international metrology regulations such as OIML R85 and API MPMS standards
Local and national approvals, such as NMi or PTB approval for custody transfer applications
Wetted parts in 316L with strong corrosion resistance, suitable for acidic applications such as crude oil
Measurement of up to three interfaces, tank bottom, single-point temperature and density profile
Ideal for LNG/LPG applications, unaffected by dc value or Boil Off Gas
Application areas
High-precision custody transfer measurement of crude oil, gasoline, diesel, petroleum and chemicals.
Process connection: flange
Temperature: -200...+200°C (-328...+392°F)
Pressure: 0...+25 bar (0...+362 psi)
Measuring range: Max. 47 m (154 ft)
Measuring accuracy: ±0.4 mm (±0.02")
International explosion protection and custody transfer approvals, WHG overfill protection and SIL approval
Technical documentation
Technical data
Documents / Manuals / Software
Accessories / Spare parts
Source:Endress+Hauserpublic information from the website
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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