 
                  Specs at a glance
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                              Accuracyup to 0.4 mm 
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                              Process temperature-200°C...200°C 
 (-328°F...392°F)
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                              Process pressure / max. overpressure limitup to 25 bar (363 psi) abs 
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                              Max. measurement distance47 m (154 ft) 
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                              Main wetted parts316L, AlloyC276, PTFE 
Field of application
The intelligent tank gauge Proservo NMS81 is designed for high accuracy liquid level measurement in custody transfer and inventory control applications with NMi- and PTB-approvals. It meets the relevant requirements according to OIML R85 and API 3.1B. It fulfills the exact demands of tank inventory management and loss control and is optimized in regards of total cost saving and safe operation.
For high accuracy custody transfer measurement in crude oil, gasoline, diesel, petrochemicals and chemicals.
- Process connections: Flanges 
- Temperature: -200 to +200°C (-328 to +392°F) 
- Pressure: 0 to +25bar (0 to +362psi) 
- Maximum measuring range: 47m (154ft) 
- Accuracy: ±0.4mm (±0.02") 
- 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 ±0.4mm (± 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 
-  Superior corrosion resistance with 316L materials in the process compatible with sour applications such as crude oil 
-  Measurement of interfaces between up to three liquid layers, tank bottom, spot, and profile densities 
-  Best fit for LNG/LPG applications without influence of dc value or Boil Off Gas 
Videos
Xpert selection
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        Specialized products 
- Designed for demanding applications
Technical excellence
Simplicity
Variable
 
                              - 
        Standard products 
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
- 
        Specialized products 
- Designed for demanding applications
Technical excellence
Simplicity
Variable
| FLEX selections | Technical excellence | Simplicity | 
|---|---|---|
| 
 Fundamental selection Meet your basic measurement needs | Technical excellence | Simplicity | 
| 
 Lean selection Handle your core processes easily | Technical excellence | Simplicity | 
| 
 Extended selection Optimize your processes with innovative technologies | Technical excellence | Simplicity | 
| 
 Xpert selection Master your most challenging applications | Technical excellence | Simplicity Variable | 
Predecessor
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                                                    Technical Information (TI)
 TI Proservo NMS81English version - 12/2024 Tank Gauging EN 27/12/202425/10/202310/11/202205/08/202013/07/2018Language: English Version: 27/12/2024 File size: 6.1 MB File name: TI01249GEN_0824-00.pdf 
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                                                            Technical Information (TI)
 TI Proservo NMS81Tank Gauging EN 27/12/202425/10/202310/11/202205/08/202013/07/2018Language: English Version: 27/12/2024 File size: 6.1 MB File name: TI01249GEN_0824-00.pdf 
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                                                            Operating Instruction (BA)
 BA Proservo NMS81Tank Gauging EN 27/12/202425/10/202310/11/202205/08/202013/07/2018Language: English Version: 27/12/2024 File size: 14.4 MB File name: BA01459GEN_0824-00.pdf 
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                                                            Device Parameter (GP)
 GP Proservo NMS81Tank Gauging EN 27/12/202410/10/202317/02/202320/07/201829/06/2017Language: English Version: 27/12/2024 File size: 4.6 MB File name: GP01077GEN_0624-00.pdf 
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                                                            Short Instruction (KA)
 KA Proservo NMS81Tank Gauging EN 27/12/202410/11/202205/08/202030/07/201824/05/2017Language: English Version: 27/12/2024 File size: 7.6 MB File name: KA01203GEN_0724-00.pdf 
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                                                            Installation Instructions (EA)
 Display set, display holder Installation InstructionsMicropilot NMR8x; Proservo NMS8x; Tankside Monitor NRF81 EN 30/11/2016Language: English Version: 30/11/2016 File size: 1.1 MB File name: EA01185GA2_0116.pdf 
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                                                            Installation Instructions (EA)
 Terminal set Installation InstructionsMicropilot NMR8x; Proservo NMS8x; Tankside Monitor NRF81 EN 30/11/2016Language: English Version: 30/11/2016 File size: 1 MB File name: EA01186GA2_0116.pdf 
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                                                            Installation Instructions (EA)
 Housing filter Installation InstructionsMicropilot, Proservo, Tankside Monitor EN 28/02/201830/11/2016Language: English Version: 28/02/2018 File size: 404 KB File name: EA01183GA2_0218.pdf 
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                                                            Installation Instructions (EA)
 SD card with holder Installation InstructionsMicropilot NMR8x; Proservo NMS8x; Tankside Monitor NRF81 EN 30/09/201730/11/2016Language: English Version: 30/09/2017 File size: 1 MB File name: EA01184GA2_0217.pdf 
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                                                            Installation Instructions (EA)
 O-ring, Servo Installation InstructionsProservo NMS8x EN 24/10/2017Language: English Version: 24/10/2017 File size: 3.2 MB File name: EA01235GF3_0117.pdf 
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                                                            Installation Instructions (EA)
 Sensor assembly Installation InstructionsTank Gauging EN 30/10/201719/10/2017Language: English Version: 30/10/2017 File size: 3.5 MB File name: EA01225GF3_0317.pdf 
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