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Product name:
Average Temperature Measurement
Product series:

NMT539

Product brand:
E+H/Endress+Hauser
Product feature:
• Prothermo NMT539 intelligent HART signal converter with average‑temperature sensor and water‑bottom interface probe. High‑precision multi‑point Pt100 elements are used to measure average temperature. Via HART communication, the NMT539 delivers stable average‑temperature and water‑interface data for a reliable measurement solution. • Inventory measurement: connect to Proservo NMS5 or tank‑side indicator NRF590, used in combination with Micropilot radar level meter. • Intrinsically safe equipment, maximising the safety of electronic component installations. • Four different models 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 various third‑party temperature sensors. • Compatible with Endress+Hauser user‑friendly ToF (Time‑of‑Flight) tool. • Multiple process connection types and cable entry specifications are available to meet standards of different countries.
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Measuring principle:
The operating principle of Resistance Temperature Detectors (RTDs) is based on the characteristic that the resistance of metallic conductors varies with temperature for temperature measurement. Its core principle: as temperature changes, the amplitude of lattice vibration of metallic conductors such as platinum and copper alters, which changes the degree of obstruction to electron movement, and consequently the resistance value varies. Take the Pt100 platinum RTD as an example. Its standard resistance is 100 Ω at 0 ℃. The resistance increases by approximately 0.385 Ω for every 1 ℃ rise in temperature, showing a highly linear relationship within a certain temperature range. In practical measurement, a constant‑current source or bridge circuit converts resistance variation into electrical signals. Three‑wire / four‑wire wiring is adopted to eliminate lead‑wire errors. Finally, resistance values are converted into temperature values according to international standard calibration tables.
Product positioning:
Using scenario:
The Prothermo NMT539 intelligent HART signal converter is used together with average‑temperature sensors and water‑bottom interface probes. It employs precise multi‑point Pt100 elements to measure average temperature. Via HART communication, the NMT539 provides stable average‑temperature and water‑interface data, constituting a highly reliable solution. For custody transfer and high‑precision inventory measurement, it is recommended to connect to the Proservo NMS5 or use with the tank‑side indicator NRF590 in conjunction with the Micropilot radar level meter.
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Jiangsu Pinyi instrument Co., Ltd.
Shanghai Ruiyingda measurement and control technology Co., Ltd.
We specialize in instruments and process control.
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