Table 3-4: Recommended Minimum Free Space to Tank Wall or Other Objects in the Tank
Probe type Condition Minimum clearance
(L)
Rigid single lead/ Segmented rigid single lead
(1)
Smooth metal tank wall 4 in. (100 mm)
Disturbing objects such as pipes and beams
Plastic, concrete or rugged metal tank wall
16 in. (400 mm)
20 in. (500 mm)
(2)
Flexible single Smooth metal tank wall 4 in. (100 mm)
Disturbing objects such as pipes and beams
Plastic, concrete or rugged metal tank wall
20 in. (500 mm)
Coaxial/Large coaxial
(1)
N/A 0 in. (0 mm)
Rigid twin lead N/A 4 in. (100 mm)
Flexible twin N/A 4 in. (100 mm)
(1) Minimum clearance from tank bottom for the coaxial, large coaxial and rigid single probes is 0.2 in. (5 mm).
(2) Applies to measurements with DC 1.4 or lower.
3.2.5
Flange connection on nozzles
Figure 3-4: Mounting in Nozzles
A. Hold Off Distance/UNZ
B. Avoid nozzles with reducer (unless using coaxial probe).
C. Make sure the nozzle does not extend into the tank.
The transmitter can be mounted in nozzles by using an appropriate flange. It is
recommended that the nozzle size is within the dimensions given in Table 3-5.
Reference Manual Mechanical installation
00809-0100-4530 April 2019
Reference Manual 33
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