Blocking Distance, Nozzle Installation - Endress+Hauser Prosonic T FMU30 Technical Information

Blocking distance,
nozzle installation
12
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Install the instrument at a height so that the blocking distance BD is not undershot, even at maximum fill level.
Use a pipe nozzle if you cannot maintain the blocking distance in any other way. The interior of the nozzle
must be smooth and may not contain any edges or welded joints. In particular, there should be no burr on the
inside of the tank side nozzle end. Note the specified limits for nozzle diameter and length. To minimise
disturbing factors, we recommend an angled socket edge (ideally 45°).
E
BD Blocking distance
SD Safety distance
E Empty calibration
Nozzle diameter
DN50/2"
DN80/3"
DN100/4"
DN150/6"
DN200/8"
DN250/10"
DN300/12"
Sensor characteristics
Emitting angle 
Blocking distance (m [ft])
Max. range (m [ft]) in liquids
Max. range (m [ft]) in solids
Caution!
If the blocking distance is undershot, it may cause device malfunction.
Note!
In order to notice if the level approaches the blocking distance, you can specify a safety distance (SD). If the
level is within this safety distance, the instrument outputs a warning or alarm message.
BD
SD
F
F Full calibration (span)
D Nozzle diameter
L Nozzle length
Maximum nozzle length mm (in)
1½" sensor
80 (3.15)
240 (9.45)
300 (11.8)
400 (15.7)
400 (15.7)
400 (15.7)
400 (15.7)
11°
0.25 (0.8)
5 (16)
2 (6.6)
Prosonic T FMU30
L
D
L00-FMU30xxx-17-00-00-xx-004
2" sensor

240 (9.45)
300 (11.8)
400 (15.7)
400 (15.7)
400 (15.7)
400 (15.7)
11°
0.35 (1.1)
8 (26)
3.5 (11)
Endress+Hauser