Emerson Rosemount 3308A, Reference Manual

Page: 159 / 226

Figure A-11: Total Probe Length
$
(
)
% & '
A. NPT
B. BSPP (G)
C. Flange
D. Tri-Clamp
®
E. Upper reference point
F. Total probe length
Select the probe length according to the required measuring range (the probe must be
hung and fully extended through the entire distance where level readings are desired).
Cut-to-fit probes
All probes can be cut in field except for the PTFE covered probe.
However, there are some restrictions for the coaxial probe: Probes over 4.1 ft. (1.25 m)
can be cut up to 2 ft. (0.6 m). Shorter probes can be cut to the minimum length of 1.3 ft.
(0.4 m).
Minimum and maximum probe length
Probe type Probe length
Flexible single lead 3.3 to 55.8 ft. (1 to 17 m)
Rigid single lead (0.3 in./8 mm) 1.3 to 9.8 ft. (0.4 to 3 m)
Rigid single lead (0.5 in./13 mm) 1.3 to 19.7 ft. (0.4 to 6 m)
Segmented rigid single lead 1.3 to 32.8 ft. (0.4 to 10 m)
Flexible twin lead 3.3 to 55.8 ft. (1 to 17 m)
Coaxial 1.3 to 19.7 ft. (0.4 to 6 m)
Probe angle
0 to 90 degrees from vertical axis
Reference Manual Specifications and reference data
00809-0100-4308 February 2020
Reference Manual 159