Technical Data
CompareThermometer
| Measuring Principle | |
| Characteristic / Application | High precision average temperature measurement, with optional capacitance water bottom sensor |
| Max. immersion length on request | 40 m (131.2 ft) |
| Process connection | JIS10K 50A RF ASME 2" 150 lb RF DN50 PN10 RF JPI 2" 150 lb RF |
| Operating temperature range | Standard: -40 °C...100 °C Optional: -55 °C...235 °C Water Bottom spec.: -40 °C...100 °C Cyrogenic: -170 °C...60 °C |
| Max. process pressure (static) | 0 bar...0.5 bar (0 psi...7.25 psi) |
| Accuracy | +/- 0.1 °C |
| Ex - approvals | ATEX, FM, CSA, IEC Ex, TIIS, NEPSI |
The Prothermo NMT539 is an intelligent HART signal converter used together with an average temperature sensor and a water bottom interface probe. It measures the average temperature using precise multi-point Pt100 elements. The NMT539 provides stable average temperature data and water interface data via HART communication, making it a highly reliable solution. For custody transfer and high-precision inventory measurement, it is recommended to connect the NMS5 Proservo or use the tank-side indicator NRF 590 together with a Micropilot radar level meter.
Advantages
-
Intrinsically safe device that maximizes the safety of the electronic component settings.
-
Four different versions are available:
-
: 1) converter only; 2) converter with temperature sensor; 3) converter with water bottom sensor; 4) converter, temperature sensor and water bottom sensor.
-
The converter is compatible with numerous third-party temperature sensors.
-
Compatible with the user-friendly Endress+Hauser ToF (time-of-flight) tool
-
Various process connection types and cable entry specifications are available to meet the standards of different countries
Application
-
The Prothermo NMT539 intelligent HART signal converter with average temperature sensor and water bottom interface probe measures the average temperature using high-precision multi-point Pt100 elements. Via HART communication, the NMT539 provides stable average temperature data and water interface data and is a reliable measurement solution.
-
Inventory measurement:
-
Connected to the Proservo NMS5 or the tank-side indicator NRF590
-
Used together with a Micropilot radar level meter
Spare Parts & Accessories 22
22 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 52017174 | *** coverSize: D100mm, d3mm. Material: CR (Chloroprene Rubber). Usage: NMT539 Converter. | Details |
| 017803-0043 | O-ring, electric cover, NBRSize: D88mm, d3mm. Material: NBR. Part: electric box, NMT. Usage: NMT532/NMT535/NMT536/NMT538/NMT539. | Details |
| 017803-0044 | O-ring, terminal housing, NBRSize: D72mm, d3mm. Material: NBR. Part: terminal box, NMT. Usage: NMT532/NMT535/NMT536/NMT538/NMT539. | Details |
| 017880-5026 | O-ring, terminal box, small, CRSize: D100mm, d3mm. Material: CR (Chloroprene Rubber). Part: terminal box, small. Usage: AT1/AT500, DRM9700, DU, NRR261/NRR263, NMT539 Converter, TGM5. | Details |
| 52017175 | CoverNMT Junction Box cover, Material: aluminium casting. Colour: E+H gray. Usage: NMT539 converter retro fit. | Details |
| 70106024 | CoverNMT terminal Box cover, M88, Color: E+H gray. Material: aluminium casting. Usage: NMT532/NMT539. | Details |
| 017802-0008 | Cover, terminal box, Alu, NMTNMT terminal box cover, M73. Color: E+H gray. Material: aluminium casting. Usage: NMT532/NMT535/NMT536/NMT539. | Details |
| 70108674 | Module bracketTemperature, water bottom 1m, HART ID: v.186. Usage: NMT539. | Details |
| 70108675 | *** module bracketTemperature, water bottom 2m, HART ID: v.185. Usage: NMT539. | Details |
| 70108676 | *** module bracketTemperature, water bottom 1m, HART ID: v.185. Usage: NMT539. | Details |
| 70108677 | FM Certification Module (Temp. v.184)HART ID: v.184. Usage: NMT532/NMT539. | Details |
| 70108679 | FM certified module (2m WB v.186)FM approval. Temperature, water bottom 2m, HART ID: v.186. Usage: NMT539. | Details |
| 71086630 | Module bracketTemperature, water bottom 1m, weight and measure, HART ID: v.186. Usage: NMT539. | Details |
| 71086631 | Electronic ModuleTemperature, weight and measure, HART ID: v.184. Usage: NMT539. | Details |
| 71086632 | Module bracketTemperature, water bottom 2m, weight and measure, HART ID: v.186. Usage: NMT539. | Details |
| 71114398 | Temperature module TIIS Exd[ia] v.184NMT539 module, only temp. Usage: NMT539. | Details |
| 71114400 | Temperature and oil-water interface module 1m TIIS Exd[ia] v.186NMT539 module, temp. + water bottom 1m. Usage: NMT539. | Details |
| 71114401 | Temperature and oil-water interface module 2 m TIIS Exd[ia] v.186NMT539 module, temp. + water bottom 2m. Usage: NMT539. | Details |
| 58020200 | Terminal + EMC Filter AssemblyUsage: NMT532/NMT539. | Details |
| 71114402 | Terminal and EMC module TIIS Exd[ia]Usage: NMT539. | Details |
Configurator / Comparison
Source:Endress+Hauserwebsite public information
Manuals & Documents 12
All documents for this model12 documents · click to expand
Prothermo NMT539 Operating Instructions English
Prothermo NMT539 Operating Instructions English
Prothermo NMT539 - Installation Instructions English
Prothermo NMT539 - Operating Instructions and Description of Device Function English
Prothermo NMT539 - Installation Instructions English
Prothermo NMT539 - Operating Instructions and Description of Device Function English
Prothermo NMT539 - Installation Instructions English
Prothermo NMT539 - Operating Instructions and Description of Instrument Function English
Prothermo NMT539 - Installation Instructions English
Prothermo NMT539 - Operating Instructions and Description of Instrument Function English
Prothermo NMT539 - Installation Instructions English
Prothermo NMT539-Operating Instructions and Description of Instrument FunctiInstallation Instruction English
Case Studies
Municipal Wastewater Treatment · thermistor — Application Case
Project Overview
The site is the inlet, biological and outlet stages of a municipal plant. The customer wanted thermistor properly configured on the existing plant, with the aim of high-accuracy temperature measurement with platinum resistance elements.
Technical Challenges
What actually causes trouble is high solids and corrosive fractions, with large diurnal flow swings, and effluent parameters drift and probes foul with sludge and biofilm. All of this means the thermistor configuration has to involve choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth.
Configuration
Supply and installation were organised through the temperature range: temperature solution matched to measuring point and response needs. On site this meant choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth, checked line by line against: stable compliance with Grade 1A discharge limits and online data reporting.
Performance
After commissioning the outcome is clear accuracy advantage at low temperatures, giving tighter process windows, and the readings are now used for process tuning.
Food & Beverage · thermistor — Application Case
Site Conditions
This is a Food & Beverage customer whose plant is at dosing, pasteurising, filling and CIP stages. The main task was high-accuracy temperature measurement with platinum resistance elements.
The Problem
The difficulty lies in syrups, dairy and beverages that scale easily, under strict hygienic requirements; at the same time frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles. Specification therefore means choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth.
What We Did
We took a temperature range approach — temperature solution matched to measuring point and response needs. Delivery was built around choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth, with point-by-point checks on: food-safety and hygienic design per 3-A / EHEDG.
Operating Outcome
In service the system performs as intended — clear accuracy advantage at low temperatures, giving tighter process windows, with routine maintenance falling noticeably.
Chemical & Pharmaceutical · thermistor — Application Case
Application Context
reactors, metering vessels and finished-product tanks is a typical Chemical & Pharmaceutical duty. The project started from thermistor, focusing on high-accuracy temperature measurement with platinum resistance elements.
Process Constraints
corrosion plus Ex protection shortens instrument life and makes downtime costly, and highly corrosive media with solvents and crystallisation, partly in explosive atmospheres only amplify it. The thermistor specification must therefore cover choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth.
Delivery Approach
Delivery was handled as the temperature range — temperature solution matched to measuring point and response needs. Execution centred on choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth, together with Ex certification and GMP traceability of records.
Field Results
Operation shows the benefit clearly — clear accuracy advantage at low temperatures, giving tighter process windows, with confidence in this measuring point improving markedly.
Power & Energy · thermistor — Application Case
Customer Profile
The typical setting in Power & Energy is boiler feedwater, turbine condensate and FGD/DeNOx systems. The measuring point is thermistor; the focus is high-accuracy temperature measurement with platinum resistance elements.
Key Difficulties
Conditions are high temperature and pressure with both steam and saline water and, on top of that, drift under high temperature and pressure, with very costly unplanned outages, which a standard configuration cannot handle for long. The design therefore starts with choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth.
Implementation
The scope ran through the temperature range: temperature solution matched to measuring point and response needs. Technically it hinges on choosing Pt100 or Pt1000 by accuracy class, wiring system and insertion depth, and on these requirements: compliance with power-industry codes and unit availability targets.
Customer Benefit
In practice this means clear accuracy advantage at low temperatures, giving tighter process windows, which cut the workload on the site maintenance team.
Related Products
Endress+HauseriTHERM ModuLine TM101
Endress+HauseriTHERM ModuLine TM131
Endress+HauserRTD Thermometer TR10
Endress+HauseriTHERM ModuLine TM111
Endress+HauseriTHERM CompactLine TM311
Endress+HauserCompact Thermometer TMR31
Endress+HauserRTD Thermometer TR24
Endress+Hauser