ROSEMOUNT TEMPERATURE TRANSMITTER 644 SERIES

• DIN head and field mount form factors

• 4–20 mA/HART® with Selectable Revision 5 and 7, FOUNDATION™ Fieldbus, or PROFIBUS® PA protocol support

• Safety integrity level (SIL) 3 capable: IEC 61508 certified by an accredited third-party agency for use in safety instrumented systems up to SIL 3 (minimum requirement of single use [1oo1] for SIL 2 and redundant use [1oo2] for SIL 3)

• Enhanced display with local operator interface (LOI)

• LCD display

• Integral transient protection

• Enhanced accuracy and stability

• Transmitter-sensor matching with Callendar-Van Dusen constants

• Variety of enclosures