The Prothermo NMT539 provides a single, intrinsically safe solution for average temperature and water bottom (interface) measurement. Choose the modules you need – temperature probe, water bottom sensor, converter – or combine them together into a single new instrument.Specifications
Elements/Probe
Converter Compatibility: Pt100, Cu100, Cu90, PtCu100, JPt100 (maximum 16 elements)
With probe: up to 16 Platinum (Pt. 100), Class A elements per IEC PUB 751 1995
Accuracy
Temperature Accuracy: ±0.15 °C (±0.27 °F), or better conversion accuracy based on IEC 60751 class A standard
Water Bottom: 4mm (±2mm) or better accuracy (at reference condition)
Measuring Range
Temperature probe:
?40…+100 °C (?40…+212 °F), ?55…+235 °C (?67…+455 °F), -170… +60 °C (?328…+158 °F)
Water bottom probe: 0 to +100 °C (?32 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 NMT539 consumes an average fixed current of 6 to 12 mA depending on configuration.
Approvals
Factory Mutual (FM) ? Intrinsically Safe ? Class I, Division 1, Groups C/D
Contact Varec for ATEX and IECEx approved devices.
Housing: rated IP65 (open housing: IP20)
Probe: rated IP68Options
01 Approvals
FM ? Intrinsically Safe ? Class I, Division 1, Groups C & D
Contact Varec for ATEX and IECEx approved devices
02 Functionality
Converter
Temperature and Converter
Water Bottom and Converter
Temperature, Water Bottom and Converter
03 Temperature Measuring Range
40…+100 °C (?40…+212 °F)
?55…+235 °C (?67…+455 °F)
?170… +60 °C (?328…+158 °F)
04 Water Bottom Measuring Range
None
1 m (3.3 ft)
2 m (6.6 ft)
05 Cable Entry
Thread NPT 1/2
Thread M20
06 Process Connection
Flange JIS 10K 50A RF, Stainless steel 316
Flange ANSI 2? 150lbs RF, Stainless steel 316
Flange DIN DN50 PN10 RF, Stainless steel 316
Flange JPI 2? 150lbs RF, Stainless steel 316
Universal coupling, PF(NPS)3/4, (converter only)
Thread M20 (converter only)
07 Number of Elements
2…Pt100 elements
3…Pt100 elements
4…Pt100 elements
5…Pt100 elements
6…Pt100 elements
7…Pt100 elements
8…Pt100 elements
9…Pt100 elements
10…Pt100 elements
11…Pt100 elements
12…Pt100 elements
13…Pt100 elements
14…Pt100 elements
15…Pt100 elements
16…Pt100 elements
08 Element Spacing
2m (2000mm or 79?)
1.5m (1500mm or 59?)
1m (1000mm or 39?)
Custom element position & spacing
3m (3000mm or 118?)
09 Probe Length
Probe length 3 ft to 131ft below flange to edge of probe
…..mm probe length
…..mm probe length, gas?tight feed through
10 Mounting Accessories
Anchor weight 7.09? tall, diameter 4.72? (180mm tall, diameter 120mm)
Anchor weight – Low profile to be laid on bottom of tank Length 39.37? (1000mm); Diameter 1.61? (41mm)
Tensioning wire + top anchor
Tensioning wire, wire hook, R1 top anchor
