Reference Manual
00809-0100-4731, Rev FA
April 2003
APEX
™
and APEX Sentry
™
Radar Gauge
2-14
Tank Nozzle Considerations
Nozzles should be wide open and smooth without any intersecting lines. The
nozzles should not be too long because it will cause a reflection and attenuate
signal. Valves can be used as long as they are open and smooth (no
reducers, lips, or rough edges).
• Nozzles should be open and smooth; no weld lines or ledges should
protrude inside the nozzle, and there should be no restrictions.
• Maximum length of nozzle: 1m for 3 and 4 inch antennas, and 0.3m for
2 inch antennas.
• Full port valves may be used.
• The antenna can be recessed in the nozzle or can extend into the
vessel. However, the end of the antenna should never be even with the
roof of the tank (Figure 2-9).
Figure 2-9. Tank Nozzle
Recommendation
The gauge should be mounted so antenna extends 1 inch or more into the
tank, or is recessed into the nozzle by 1 inch or more.
Figure 2-10. Example of multiple
nozzle function
Note: Do not install an APEX
Radar Gauge where
there is a T-intersection in the
mounting nozzle.
Recommended Not Recommended
APEX_CONEALIGNBA.TIF
Note: Antenna must not be even with the roof tank.
APEX_CONEALIGN.TIF
GASPURGE_AB.TIF
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