Instruction Manual

Instruction Manual
D102803X012
249W Sensor
December 2012
4
Installation
WARNING
To avoid personal injury or property damage resulting from the sudden release of pressure:
D Always wear protective clothing, gloves, and eyewear when performing any installation operations to avoid personal
injury.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
D If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section of this
instruction manual.
The 249W sensor can be installed directly on the vessel as shown in figure 4. It also can be installed in a user fabricated
cage mounted on the side of the vessel as shown in figure 5. The sensor mounts on the top of the vessel or in the
displacer cage using an NPS 3 raised face flange with the NPS 3 249W wafer body, or an NPS 4 raised‐face flange with
the NPS 4 249W wafer body.
Figure 4. Fisher 249W Sensor Top Mounted on Vessel
249W WAFER BODY
NPS 3 OR 4 RF FLANGE
DISPLACER
NOTE:
1 STILLWELL REQUIRED AROUND DISPLACER IF THE FLUID IS IN A STATE
OF CONTINUOUS AGITATION
W8266
STILLWELL
1