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Catalog excerpts
![Servo tank gauging instrument Proservo NMS81 - 1](https://img.directindustry.com/pdf/repository_di/4726/servo-tank-gauging-instrument-proservo-nms81-991715_1m.jpg)
Servo tank gauging instrument Proservo NMS81 High precision servo measurement for liquid level, interface and density F 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 More information and current pricing: www.endress.com/NMS81 Accuracy up to 0.4 mm Process temperature -200°C...200°C (-328°F...392°F) Process pressure absolute / max. overpressure limit up to 25 bar (363 psi) abs Max. measurement distance 47 m (154 ft) Main wetted parts 316L, 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 in
Open the catalog to page 1![Servo tank gauging instrument Proservo NMS81 - 2](https://img.directindustry.com/pdf/repository_di/4726/servo-tank-gauging-instrument-proservo-nms81-991715_2m.jpg)
control and is optimized in regards of total cost saving and safe operation. Features and specifications 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 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 absolute
Open the catalog to page 2![Servo tank gauging instrument Proservo NMS81 - 3](https://img.directindustry.com/pdf/repository_di/4726/servo-tank-gauging-instrument-proservo-nms81-991715_3m.jpg)
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...
Open the catalog to page 3![Servo tank gauging instrument Proservo NMS81 - 4](https://img.directindustry.com/pdf/repository_di/4726/servo-tank-gauging-instrument-proservo-nms81-991715_4m.jpg)
Continuous / Liquids 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 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 absolute / max. overpressure limit up to 25 bar (363 psi) abs Main wetted parts 316L, AlloyC276, PTFE Process connection Flange:...
Open the catalog to page 4![Servo tank gauging instrument Proservo NMS81 - 5](https://img.directindustry.com/pdf/repository_di/4726/servo-tank-gauging-instrument-proservo-nms81-991715_5m.jpg)
Continuous / Liquids Outputs: 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 Safety approvals Overfill protection WHG SIL Design approvals EN 10204-3.1 NACE MR0175, MR0103 Metrological approvals and certificates Redundant fieldbus Alu-coated or 316L housing Weather protection cover Guide wire assembly Relief valve Gas purging nozzle connection Pressure gauge Cleaning nozzle connection
Open the catalog to page 5![Servo tank gauging instrument Proservo NMS81 - 6](https://img.directindustry.com/pdf/repository_di/4726/servo-tank-gauging-instrument-proservo-nms81-991715_6m.jpg)
Continuous / Liquids 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 addresses.endress.com info@endress.com
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