Prothermo NMT532 Average Temperature Converter
The Prothermo NMT532 average temperature converter and sensor is an intrinsically safe, multi element (Pt100) resistance device designed to measure the average product temperature in bulk liquid storage tanks.
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Meets API Standards
The Prothermo NMT532 is installed vertically onto spheres, bullets, cone, dome or floating roof tanks. Measurements are based on API (American Petroleum Institute) Manual of Petroleum Measurement Standard, Chapter 7.
Liquid and Vapor Profiles
The Prothermo NMT532 contains up to 6 temperature elements, spaced at 2 or 3 meter intervals along the length of the probe. A continuous measurement profile of average liquid and/or average vapor temperature throughout the tank is available by reading the position and temperature of each element.
Tank Gauging System
Power and local HART communications are provided over a 2-wire, intrinsically safe (i.s.) connection from compatible instruments, such as the Varec 6005 Servo Tank Gauge (STG), 4560 Servo Gauge Monitor (SGM) or the 4590 Tank Side Monitor (TSM).
2-6 Platinum (Pt. 100), Class A element, multi spot configuration with a fixed interval of 6 to 9 feet, (2 or 3 meters) per IEC PUB 751 1995
‐30 °F to +160 °F (‐34 °C to +71 °C)
‐20 to + 100 °C, (‐4 to +212 °F)
Power & Communications
DC16‐30V input (DC24V ±10% is supplied by the HOST i.s. HART communication line for standard applications.)
The Prothermo NMT532 consumes an average fixed current of 6.0 mA.
Factory Mutual (FM) ‐ Intrinsically Safe ‐ Class I, Division 1, Groups A/B/C/D
Contact Varec for ATEX and IECEx approved devices.
Housing: rated IP65 (open housing: IP20)
Probe: rated IP68
For complete technical specifications, download the technical document or product manual.
02 Cable Entry
03 Process Connection
04 Length Elements & Spacing
05 Installation Accessories
Parts and Accesories