Technical Data
CompareThermometer
| Measuring Principle | |
| Characteristic / Application | High precision average temperature measurement |
| Max. immersion length on request | 18.5 m (60.6 ft) |
| Process connection | DN50 PN 10 RF ASME 2"150 lb RF |
| Operating temperature range | -20 °C...100 °C (-4 °F...212 °F) |
| 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, NEPSI |
The Prothermo NMT532 is an intrinsically safe multi-signal converter equipped with a high-precision average temperature sensor for inventory control. It is the ideal solution for numerous tank farm measurement applications and provides stable average temperature data via HART communication. For custody transfer and precise inventory measurement, it is recommended to use the Proservo NMS5 or the tank-side indicator NRF590 together with a Micropilot radar level meter.
Advantages
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High-precision measurement
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Intrinsically safe device that maximizes the safety of the electronic circuit.
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Compatible with the user-friendly ToF (time-of-flight) tool
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Simple and economical
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Small size, light weight
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Reliable measurement, simple installation
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Maintenance-free
Application
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The Prothermo NMT532 consists of an intelligent HART signal converter and an average temperature sensor. For average temperature measurement, it measures precisely using multiple Pt100 elements (up to 6) at fixed intervals. Via HART communication, the NMT532 provides stable average temperature data and is the ideal solution for numerous tank farm measuring instrument applications.
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Inventory measurement: connected to the tank-side indicator NRF 590, used together with a Micropilot radar level meter or the NMS5 Proservo.
Spare Parts & Accessories 6
6 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 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 |
| 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 |
| 70108677 | FM Certification Module (Temp. v.184)HART ID: v.184. Usage: NMT532/NMT539. | Details |
| 58020200 | Terminal + EMC Filter AssemblyUsage: NMT532/NMT539. | Details |
Configurator / Comparison
Source:Endress+Hauserwebsite public information
Manuals & Documents 11
All documents for this model11 documents · click to expand
Prothermo NMT532 Operating Instructions English
Prothermo NMT532 - Operating Instructions English
Prothermo NMT532 - Operating Instructions English
Prothermo NMT532 - Operating Instructions English
Prothermo NMT532 - Operating Instructions English
Prothermo NMT532_Operating Instructions English
Prothermo NMT532 Technical Information English
Prothermo NMT532 - Technical Information English
Prothermo NMT532 - Technical Information English
Prothermo NMT532 - Technical Information English
Prothermo NMT532 - Technical Information 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.
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