Data Sheet

2500-249 Controllers and Transmitters
D200037X012
Product Bulletin
34.2:2500
July 2012
7
W0144-1
DAMPING ORIFICE
(REMOVABLE IF
CLOGGING WILL OCCUR)
W1800‐1
W2141‐1
KNIFE EDGE
BEARING
TORQUE TUBE
DISPLACER ROD
ROTATABLE
HEAD
DISPLACER
CAGE
Figure 2. Fisher 249B Caged Sensor (Typical
of all Rotatable‐Head Caged Sensors)
Figure 3. Typical Cageless Sensors
DISPLACER ROD
DISPLACER
STEM END
CONNECTOR
OPTIONAL
TRAVEL
STOP PIN
AND PLATE
DISPLACER
STEM
DISPLACER
STUD
249BP MOUNTS ON
TOP OF VESSEL
W0660‐1
249VS MOUNTS ON
SIDE OF VESSEL
STANDARD TRAVEL
STOP ASSEMBLY
249W WAFER BODY
NPS 3 OR 4
RF FLANGE
STILLWELL
1
Note:
1 Stillwell required around displacer if the fluid is in
a state of continuous agitation
W8252
CENTER OF DISPLACER
SHOULD BE LOCATION
OF LIQUID OR INTERFACE
LEVEL DURING NORMAL
OPERATION
249W MOUNTS ON TOP OF VESSEL AS SHOWN OR CAN
MOUNT IN CUSTOMER FABRICATED CAGE
W9353
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