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Brand: Endress+Hauser (E & H)
Endress+Hauser NMS83 Proservo Stainless Servo Tank Gauge
Description
Endress+Hauser NMS83 Proservo stainless steel servo tank gauge
The Endress+Hauser NMS83 is the stainless steel member of the Proservo NMS8x servo tank gauge series. It measures liquid level, interface, tank bottom and density with the same ±0.4 mm level accuracy as the aluminium NMS80, but the process section, flange and displacer options are built around 316/316L and hygienic requirements. The manufacturer positions it for alcohols, beverages and similar products where wetted parts, polished displacers and easy cleaning matter.
Seven Star LLC supplies NMS83 gauges in Oman and the GCC as an independent supplier in Muscat. Because the NMS83 is configured from ordering features, we need your tank and product data before we can quote the correct wire, displacer and flange.
Reading the NMS83 configuration
- Housing (feature 070): option AC is a coated aluminium transmitter with a 316/316L process section; option BC is a transmitter and process section in 316/316L, about 7.8 kg heavier.
- Wire (feature 110): 16 m PFA-coated 316L wire or 22 m Alloy C276 wire.
- Displacer (feature 120): 316L, polished 316L, Alloy C276 or PTFE, in 30, 50, 70 or 110 mm sizes, including a hygienic white PTFE type.
- Flange (feature 140): 316/316L flanges in ASME, EN, JIS and JPI standards.
NMS83 technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Endress+Hauser / NMS83 |
| Measuring principle | Servo displacement gauging with magnetically coupled wire drum |
| Level accuracy | ±0.4 mm (±0.016 in) under reference conditions |
| Measuring wire options | 16 m (PFA over 316L) or 22 m (Alloy C276) |
| Process temperature | –200 to +200 °C (–328 to 392 °F), set by the chosen seal |
| Process pressure | 0 to 6 bar (600 kPa / 87 psi) for the stainless steel version |
| Medium density / viscosity | 0.430 to 2.000 g/cm³; 0 to 5,000 mPa·s |
| Wire drum material | 316L |
| Flange options | NPS 3 and 6 in Class 150 RF, DN80 PN10/16, JIS 10K 80A/100A/150A, JPI 80A 150 lbs, all 316/316L |
| Supply voltage | 100 to 240 VAC, 52 to 75 VAC or 19 to 64 VDC |
| Protocols | V1, Modbus RS-485, HART; Ex d and Ex i 4–20 mA HART modules available |
| Ambient temperature | –40 to +60 °C (display –20 to +70 °C) |
| Ingress protection | IP66/68, NEMA Type 4X/6P |
| Functional safety | SIL 2 single channel, SIL 3 dual channel per IEC 61508 (min, max, continuous level) |
| Weight | Approx. 30 kg with a 3 in flange; 37 kg with 6 in or 10K150A flange (housing option AC) |
What makes the NMS83 different from other Proservo gauges
The measuring principle is identical: a displacer on a wire, a stepping motor and a magnetic coupling that keeps the wetted drum section away from the electronics. What changes with NMS83 is the material set. All process-wetted parts are 316/316L, Alloy C276 or PTFE, and the datasheet offers polished 316L cylindrical and conical displacers and a white hygienic PTFE displacer. That combination lets the gauge sit on tanks that hold alcohol, food-grade liquids or aggressive chemicals without introducing aluminium into the process area.
The wire choice is also narrower than on the NMS80: 16 m or 22 m rather than up to 36 m. For taller tanks, the NMS80 or a radar solution should be considered instead.
Displacer selection for NMS83
The datasheet gives a recommendation by application. For non-viscous liquids such as clear alcohol, a 50 mm 316L displacer is recommended for product level, interface and density; a 70 mm conical displacer also works well. For viscous liquids a 50 mm PTFE displacer is recommended for product level only, and interface or density measurement is not recommended. Larger diameters generally improve accuracy, and cylindrical shapes with rounded ends move through liquids with less resistance, which speeds interface measurement.
| Option | Displacer | Size |
|---|---|---|
| 1AC | 316L cylindrical | 50 mm |
| 1BE | 316L conical | 70 mm |
| 4AC | 316L polished cylindrical | 50 mm |
| 4AE | 316L polished conical | 70 mm |
| 2AC | PTFE cylindrical | 50 mm |
| 5AC | PTFE cylindrical, hygienic white | 50 mm |
| 3AC | Alloy C276 cylindrical | 50 mm |
Selection and ordering checklist for NMS83
- Product, density range and viscosity, to pick the displacer material and diameter.
- Tank height, to confirm the 16 m or 22 m wire is sufficient.
- Whether polished or hygienic white wetted parts are required by the process.
- Nozzle flange standard and size, all supplied in 316/316L.
- Housing version: aluminium transmitter with stainless process section, or all stainless.
- Power supply, protocol and I/O modules, and any hazardous-area approval.
- Accuracy class, calibration certificate type and weights-and-measures need.
- Tank type: fixed roof, pressurized, or with agitator; this decides guide-system advice.
Installation, commissioning and care of the NMS83
Follow the tank-type table in the datasheet when planning the installation. Floating roof tanks require a stilling well, and guide wires are not allowed on pressurized tanks because they would block valve closure when the wire, drum or displacer is replaced. Fit a ball valve between nozzle and gauge so the wetted parts can be serviced without emptying the tank.
The gauge is commissioned from the local display, FieldCare or fieldbus commands. For hygienic use, plan cleaning of the displacer and wire during the normal tank cleaning cycle, and keep a spare displacer on site. Keep records of calibration points so the NMS83 can be checked against a reference level at intervals your quality system requires.
Typical NMS83 applications in Oman and the GCC
In Oman and the GCC the NMS83 is a candidate for chemical and solvent storage, specialty products, food-grade liquids and water-miscible products where stainless wetted parts are preferred over aluminium. Coastal humidity, salt air and summer heat are handled by the IP66/68 enclosure and the –40 to +60 °C ambient range. Where the main duty is crude oil or fuels, the NMS80 is usually the more economical choice.
NMS83 compared with NMS80
| Item | NMS80 | NMS83 |
|---|---|---|
| Housing / process section | Coated aluminium | Aluminium or 316/316L; 316/316L process |
| Wire lengths | 16, 22, 28, 36 m | 16, 22 m |
| Pressure | 0 to 6 bar | 0 to 6 bar |
| Flange material | Aluminium | 316/316L |
| Focus | Oil, petrochemical | Alcohol, food, beverage, chemicals |
Information to send with an NMS83 RFQ
- Product name, density and viscosity.
- Tank height, nozzle size and flange standard.
- Required displacer type, including polished or hygienic.
- Power supply and fieldbus protocol.
- Hazardous-area zone, SIL requirement and calibration class.
- Replacement of an existing gauge: send its nameplate.
Documents and quotation
The official Technical Information for the Proservo NMS83 (TI01250G) is attached on this page as a datasheet, including the full ordering features and dimensions.
Send the NMS83 configuration or your tank data and Seven Star LLC will prepare a quotation for Oman and the GCC.
Other Models in the Eh Proservo Nms8x Range
Seven Star LLC supplies models from the Eh Proservo Nms8x range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.
| Model | Category | |
|---|---|---|
| Endress+Hauser NMS80 Proservo Servo Tank Gauge | Level Instrumentation | View details |
| Endress+Hauser NMS83 Proservo Stainless Servo Tank Gauge | Level Instrumentation | You are viewing this model |
Datasheets & Documents
- Datasheet Endress+Hauser NMS83 Datasheet Download
Reviews (0)
About brand
Endress+Hauser makes process measurement instruments for flow, level, pressure, temperature and liquid analysis. Georg H. Endress and Ludwig Hauser started the business in Lörrach, Germany, on 1 February 1953, first selling level meters, and the Endress+Hauser name has been used since 1957. The group is headquartered in Reinach, Switzerland, and has been wholly owned by the Endress family since 1975.
Seven Star LLC is an independent supplier listing Endress+Hauser flowmeters, level and pressure transmitters, temperature assemblies and liquid analysis products for buyers in Oman and the GCC. Instruments are matched from the full order code on the nameplate.
Endress+Hauser company profile
| Origin | Founded in Lörrach, Germany, on 1 February 1953 by the Swiss engineer Georg H. Endress and Ludwig Hauser |
|---|---|
| Headquarters | Endress+Hauser AG, Reinach (Basel-Landschaft), Switzerland |
| Ownership | Family owned; the Endress family has been the sole shareholder since 1975, and a family charter commits the company to stay family owned |
| Size | About 16,500 employees and sales of about EUR 3.7 billion (2023, as reported by the company) |
| Product families | Proline flowmeters, Micropilot and Levelflex radar, Liquiphant switches, Cerabar and Deltabar pressure, iTEMP and iTHERM temperature, Liquiline and Memosens liquid analysis |
Milestones
- 1953: Georg H. Endress and Ludwig Hauser start the business in Lörrach on 1 February, first selling level meters.
- 1957: The Endress+Hauser name comes into use.
- 1975: The Endress family becomes sole shareholder.
- 2023: About 16,500 employees and sales of about EUR 3.7 billion, as reported by the company.
Endress+Hauser product lines
| Line | Measuring principle | Typical use |
|---|---|---|
| Promass F 300, Promass 80F, 83F/84F | Coriolis mass flow | Direct mass flow and density of liquids and gases, hydrocarbon transfer and chemical dosing |
| Promag P 300, P 500, H 300, W 400, W 10, 50P | Electromagnetic flow | Water, wastewater, slurries and other conductive liquids |
| Prowirl F 200, 72F | Vortex flow | Steam, gas and low-viscosity liquids |
| Prosonic Flow 92F, t-mass 65F | Ultrasonic and thermal mass flow | Water lines; compressed air and industrial gases |
| Micropilot FMR62, FMR67, FMR60, FMR10B, FMR20, FMR50, FMR52 | Free-space radar level, 80 GHz and 26 GHz | Tanks, process vessels, silos and open water channels |
| Levelflex FMP51, FMP50, FMP54, FMP55 | Guided wave radar level | Level and interface in vessels, separators and bypass chambers |
| Liquiphant FTL51, Prosonic S FMU90 | Vibronic point level; ultrasonic level | High and low level alarms, pump protection, open channel flow |
| Cerabar PMC71B, PMP51B, PMP71, Deltabar PMD78B, PMD75 | Pressure and differential pressure | Process pressure, hydrostatic level and DP flow |
| iTEMP TMT82, TMT162, iTHERM TM101, TR66, TR10 | Temperature transmitters and thermometers | RTD and thermocouple points with thermowells |
| Liquiline CM444, CM442, Memosens CPS11E, Stamolys reagents | Liquid analysis | pH, ORP, conductivity, dissolved oxygen and nutrient analysis in water treatment and process |
Where Endress+Hauser instruments are used
In Oman and the GCC, Endress+Hauser instruments are common in oil and gas production and processing, refineries and petrochemicals, desalination and water networks, wastewater treatment, power plants and food and beverage plants. Coriolis meters measure hydrocarbon and chemical flows, electromagnetic meters cover water and wastewater, radar transmitters handle tank and silo level, and Liquiline analysers monitor water quality. Proline 300 and 500 flowmeters include Heartbeat Technology for in-situ verification, which reduces the need to remove a meter for checks.
Ordering Endress+Hauser instruments: what we need
The order code on the nameplate (for example PMP71-1QA1S11RDADU) defines every option: measuring range, process connection, materials, output, approvals and display. Send it with the serial number; Endress+Hauser can retrieve the original configuration from the serial number. For a new instrument add the medium, operating and design pressure and temperature, range, line size or tank geometry, process connection, wetted materials, output or protocol (4-20 mA HART, PROFIBUS, FOUNDATION Fieldbus, Modbus) and the hazardous-area approval required. Older models such as Promass 80/83 or Micropilot M are replaced by current Proline or 80 GHz Micropilot devices.
Facts checked against Endress+Hauser company history and product information, October 2026.
Browse Endress+Hauser products by category: Flowmeters, Level Transmitter, Pressure Instrumentation, Temperature, Liquid Analysis Sensors, Liquid Analytical Systems.
FAQ
Questions about the Endress+Hauser NMS83 Proservo Stainless Servo Tank
Answers from our engineering team on installation, compatibility and integration.
01What is the NMS83 designed for?
It is the stainless steel Proservo servo gauge for high-precision level, interface and density measurement, with polished and hygienic displacer options for alcohol, food and beverage duties.
02What wire lengths does the NMS83 offer?
The datasheet lists a 16 m PFA-coated 316L wire and a 22 m Alloy C276 wire. Taller tanks need another gauge type.
03What pressure can the NMS83 handle?
The stainless steel version is rated 0 to 6 bar (600 kPa, 87 psi) process pressure, with process temperature from –200 to +200 °C depending on the seal.
04Which displacer should I choose for clear alcohol?
The datasheet recommends a 50 mm 316L displacer for level, interface and density in non-viscous liquids such as alcohol; a 70 mm conical type also works well.
05Does the NMS83 support functional safety?
It is listed for SIL 2 with a single channel and SIL 3 with dual channel redundancy for min, max and continuous level monitoring per IEC 61508.
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