Instruction Manual
D200099X012
249 Caged Sensors
April 2017
2
carefully read, understand and follow all the contents of this manual, including all safety cautions and warnings. If you
have any questions about these instructions, contact your Emerson sales office
or Local Business Partner before
proceeding.
Description
249 sensors are designed to measure liquid level, interface level, or density/specific gravity inside a vessel.
A torque tube assembly (figure 3) and displacer provide an indication of liquid level, interface level, or density/specific
gravity. The torque tube assembly consists of a hollow torque tube with a shaft welded inside it at one end and
protruding from it at the other end.
Figure 2. Rod and Block Shipping Lock
SHIPPING BLOCK
LOCK NUT
SHIPPING STOP ROD
LOCK NUT
SHIPPING BLOCK
SHIPPING STOP ROD
X1113
X1114
Figure 3. Typical Caged Displacer
W1800-1
W2141-1
KNIFE EDGE
BEARING
TORQUE TUBE
DISPLACER ROD
ROTATABLE
HEAD
DISPLACER
CAGE
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