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Reference Manual
00809-0100-4665, Rev AA
August 2010
Rosemount 8732
5-16
PROCESS LEAK
PROTECTION
(OPTIONAL)
The Rosemount 8705 and 8707 High-Signal Sensor housing is fabricated
from carbon steel to perform two separate functions. First, it provides
shielding for the sensor magnetics so that external disturbances cannot
interfere with the magnetic field and thus affect the flow measurement.
Second, it provides the physical protection to the coils and other internal
components from contamination and physical damage that might occur in an
industrial environment. The housing is completely welded and gasket-free.
The three housing configurations are identified by the W0, W1, or W3 in the
model number option code when ordering. Below are brief descriptions of
each housing configuration, which are followed by a more detailed overview.
• Code W0 — sealed, welded coil housing (standard configuration)
• Code W1 — sealed, welded coil housing with a relief valve capable of
venting fugitive emissions to a safe location (additional plumbing from
the sensor to a safe area, installed by the user, is required to vent
properly)
• Code W3 — sealed, welded coil housing with separate electrode
compartments capable of venting fugitive emissions (additional
plumbing from the sensor to a safe area, installed by the user, is
required to vent properly)
Standard Housing
Configuration
The standard housing configuration is identified by a code W0 in the model
number. This configuration does not provide separate electrode
compartments with external electrode access. In the event of a process leak,
these models will not protect the coils or other sensitive areas around the
sensor from exposure to the pressure fluid (Figure 5-17).
Figure 5-17. Standard Housing
Configuration — Sealed Welded
Housing (Option Code W0)
1
/2–14 NPT Conduit
Connection
(no relief valve)