Rosemount 644 Head and Rail Mount Temperature Transmitters
The ideal temperature transmitter for any Single Point measurement application.
The Rosemount 644 offers a flexible and reliable solution to any temperature measurement. As a highly accurate transmitter that comes in either HART, FOUNDATION Fieldbus or PROFIBUS PA communication protocols, or a head mount or rail mount Form Factor, the Rosemount 644 is designed to meet your most demanding applications. An available LCD display provides local measurement indication and the Transmitter-Sensor Matching functionality provides unmatched accuracy for a transmitter and RTD sensor measurement point
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- Transmitter-Sensor Matching improves system accuracy up to 75%
- LCD Meter provides convenient process and diagnostics indication
- 2-year stability for head and rail mount applications
- Variety of enclosure options including polished stainless steel housings for biotechnology, pharmaceutical and other sanitary applications
- Available as an installation-ready Complete Point Solution that includes a variety of sensors, thermowells and enclosures
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Rugged EMC performance for reliable measurements – meets NAMUR NE 21 standards |
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Custom Alarm and Saturation Levels |
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Available in Head or Rail Mount Form |
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Hardware Alarm Switch |
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Multi-Dropped for HART Control Systems |
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Standard function blocks: 2 Analog Inputs, 1 PID and 1 Backup Link Active Scheduler (LAS) |
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Regulatory Control Suite 1 PID offers value and flexibility when generating control strategies. |
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FISCO Approvals for fieldbus installations |
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PlantWeb Alerts Available |
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18-bit analog-to-digital converter with ambient temperature compensation enhances performance and process quality |
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Compliant to Profibus PA Profile 3.02 |
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Standard function blocks: 1 Physical, 1 Transducer, and 1 Analog Input |
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Custom Factory Configuration of the Address available |
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Standard and FISCO approvals for Profibus installations |
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Digital Accuracy |
+ 0.15° C (+0.27° F) for Pt100 RTD |
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D/A Accuracy |
+0.03% of span |
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Ambient Temperature Effects |
0.003°C per 1.0°C (1.8°F) change in ambient (Pt100 RTD) |
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Stability |
.15% of Reading or .15°C for 2 years |
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Input |
2-, 3-, and 4-wire RTDs, thermocouple, millivolt, ohm |
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Supply Voltage |
12 - 42.2V in HART Protocol |
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Form Factor |
DIN A Head Mount or Rail Mount |
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Digital Accuracy |
+ 0.15° C (+0.27° F) for Pt100 RTD |
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Ambient Temperature Effects |
0.003°C per 1.0°C (1.8°F) change in ambient (Pt100 RTD) |
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Stability |
.15% of Reading or .15°C for 2 years |
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Input |
2-, 3-, and 4-wire RTDs, thermocouple, millivolt, ohm |
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Supply Voltage |
9 - 32V in FOUNDATION Fieldbus Protocol |
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Form Factor |
Head Mount |
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Digital Accuracy |
+ 0.15° C (+0.27° F) for Pt100 RTD |
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Ambient Temperature Effects |
0.003°C per 1.0°C (1.8°F) change in ambient (Pt100 RTD) |
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Stability |
.15% of Reading or .15°C for 2 years |
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Input |
2-, 3-, and 4-wire RTDs, thermocouple, millivolt, ohm |
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Supply Voltage |
9 - 32V in FOUNDATION Fieldbus Protocol |
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Form Factor |
Head Mount | |
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