
15
Reference Manual
00809-0100-4811, Rev DA
Section 2: Transmitter Overview
January 2015
Transmitter Overview
2.7 Probe selection guide
Use the following guidelines to select appropriate probe for your Rosemount 3300 Series
Transmitter:
Table 2-1. Probe Selection Guide
G = Good, NR = Not Recommended, AD = Application Dependent (consult factory)
Coaxial Rigid twin lead Flexible
twin lead
Rigid single lead,
segmented rigid
single lead
Flexible
single lead
Measurements
Level G G G G G
Interface (liquid/liquid) G
(1)
(1) Not in fully immersed applications.
GGNRNR
Process medium characteristics
Changing density G G G G G
Changing dielectric
(2)
(2) For overall level applications, a changing dielectric has no effect on the measurement. For interface measurements, a changing dielectric of the top fluid
degrades the accuracy of the interface measurement.
GG G G G
Wide pH variations G G G G G
Pressure changes G G G G G
Temperature changes G G G G G
Condensing vapors G G G G G
Bubbling/boiling surfaces G G AD G AD
Foam (mechanical avoidance) AD NR NR NR NR
Foam (top of foam measurement) NR AD AD AD AD
Foam (foam and liquid
measurement)
NR AD AD NR NR
Clean liquids G G G G G
Liquid with dielectric < 2.5 G AD AD
AD
(3)
(3) OK when installed in pipe.
NR
Coating liquids NR NR NR
AD
(4)
AD
Viscous liquids NR AD AD
AD
(4)
(4) For viscous or sticky applications, it is not recommended to use centering discs mounted along the probe.
G
Crystallizing liquids NR NR NR AD AD
Solids/Powders NR NR NR AD AD
Fibrous liquids NR NR NR G G
Tank environment considerations
Probe is close
(< 12 in./30 cm) to tank wall /
disturbing objects
GAD AD NR NR
High turbulence G G AD G AD
Turbulent conditions causing
breaking forces
NR NR AD NR AD
Long and small mounting nozzles
(diameter < 6 in./15 cm,
height > diameter + 4 in./
10 cm)
GAD NR NR NR
Probe might touch nozzle /
disturbing object
GNR NR NR NR
Liquid or vapor spray might touch
probe
GNR NR NR NR
Disturbing EMC environment in
tank
AD NR NR NR NR
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