Product Data Sheet 00813-0100-4728, Rev MA March 2008
Rosemount 644 Dimensional Drawings 644H (DIN A Head Mount)
Shown with Standard Compression Screw Terminals Standard Sensor Terminals
WAGO Spring Clamp Sensor Terminals
60 (2.4) 33 (1.3)
Meter Connector
24 (1.0)
Communication Terminals Power Terminals
® Spring Clamp Terminals
Shown with WAGO
Failure Mode Switch (HART) or Simulation Switch (FOUNDATION Fieldbus)
60 (2.4) 33 (1.3)
Meter Connector
24 (1.0)
Communication Terminals Power Terminals
Failure Mode Switch (HART) or Simulation Switch (FOUNDATION Fieldbus)
34 (1.33)
33 (1.30)
Threaded-Sensor Universal Head (Option code J5 or J6)
Integral DIN Style Sensor Connection Head
112 (4.41) Label
96 (3.76) 104 (4.09) 95 (3.74)
LCD Display Meter Cover
Standard Cover
78 (3.07) 128 (5.04) with LCD Display
75 103 (4.03) with LCD (2.93) Display
316 SST “U” Bolt Mounting, 2-inch Pipe
100 (3.93)
Note: A “U” Bolt is shipped with each universal head unless assembly Note: The DIN Style Integral sensor connection head is only available option X1, X2, or X3 is ordered. Since the head is integrally mounted to the through Volume 2 of the Rosemount Temperature Sensors and sensor, it may not need to be used. Accessories Product Data Sheet (document number 00810-0101-2654).
Dimensions are in millimeters (inches)
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