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Reference Manual
00809-0100-4308, Rev CA
2.6
Probe selection guide
Use the following guidelines to choose appropriate probe for your Rosemount 3308 Series transmitter:
Table 2-1. Probe Selection Guide. G=Good, NR=Not Recommended, AD=Application Dependent (consult factory)
Measurements
Level
Interface (liquid/liquid)
Process medium characteristics
Changing density
(2)
Changing dielectric
Wide pH variations
Pressure changes
Temperature changes
Condensing vapors
Bubbling/boiling surfaces
Foam (mechanical avoidance)
Foam (top of foam measurement)
Foam (foam and liquid measurement)
Clean liquids
(3)
Liquid with dielectric<2.0
(4)
Coating liquids
(4)
Viscous liquids
Crystallizing liquids
Solids/Powders
Fibrous liquids
Tank environment considerations
Probe is close (<12 in./30 cm) to disturbing objects
Tall and narrow mounting nozzles
(diameter <6 in./15 cm and height>diameter + 4 in./10 cm)
Probe might touch nozzle / disturbing object
Liquid or vapor spray might touch probe
High turbulence
Turbulent conditions causing breaking forces
Non-metallic tanks or open atmosphere applications
1.
Not in fully submerged applications.
2.
For overall level applications a changing dielectric has no effect on the measurement. For interface measurements a changing dielectric of the top fluid will degrade the
accuracy of the interface measurement.
3.
See
Table A-1 on page 113
for more information.
4.
See
Table A-2 on page 113
for more information.
5.
Ok If probe is anchored.
6.
Not suitable in applications with disturbing EMC from nearby equipment.
Transmitter Overview
PRELIMINARY
Flexible single
lead
G
G
G
G
G
G
G
G
G
NR
AD
AD
G
AD
G
G
AD
NR
G
NR
AD
NR
NR
(5)
AD
AD
(6)
AD
Transmitter Overview
Rigid single lead,
Flexible twin
segmented rigid
lead
single lead
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
NR
NR
AD
AD
AD
AD
G
G
AD
AD
G
NR
G
AD
AD
NR
NR
NR
G
NR
NR
AD
AD
AD
NR
NR
NR
NR
(5)
G
AD
NR
AD
(6)
(6)
AD
AD
August 2017
Coaxial
G
(1)
G
G
G
G
G
G
G
G
AD
NR
NR
G
AD
NR
NR
NR
NR
NR
G
G
G
G
G
NR
G
11
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Troubleshooting
