Level measurement

128 Continuous level measurement in bulk solids

4. Instrument selection within the measuring principle

Ultrasonics • Non-contact, maintenance-free measurement • Unaffected by dielectric constant, density or humidity • Unaffected by build-up due to the self-cleaning effect of sensors by diaphragm vibration

Prosonic S FMU9x

FMU90/95

C

FDU90 FDU91

FDU91F

FDU92 FDU93

FDU95

Typical applications

• Coarse to fine-grained materials in silos, on belts, stockpiles and in crushers • Rough process conditions (vibration, build-up, corrosion, abrasion) • Low structural heights • Separate instrumentation up to 300m/984ft • Up to 6 additional point level, alarm outputs • Automatic recognition of connected sensors • Up to 10 sensors can be connected attractive price in silo farms • 4 to 20mA HART® or PROFIBUS® DP

Special features

Technical data

FDU90 FDU91 FDU91F

FDU92 FDU93 FDU95

•Process pressure from +0.7 to

+4bar/ +58psi

+3bar/ +43.5psi +95°C/ +203°F

+1.5bar/ +22psi +150°C/ +302°F

•Process

+80°C/ +176°F

+80°C/ +176°F

+105°C/ +221°F

+95°C/ +203°F

temperature * from -40 to

•Max. Measuring range

1.2m/ 3.9ft

5m/ 16ft

5m/16ft

10m/ 32ft 0.4m/ 1.3ft

15m/ 49ft 0.6m/ 2ft

45m/ 150ft

• Blocking distance •Accuracy •Process

0.07m/ 0.23ft

0.3m/ 1ft

0.3m/1ft

0.7m/2.3ft (0.9m//2.9ft ** )

±2mm/0.08", ±0.2% of measuring distance

1"

1"

1", Tri-Clamp, collar flange

1"

1"

1"

connection rear side front side

•Process

PVDF

PVDF

316L

PVDF

UP, Alu, PTFE

UP, 316L ** , PE

contacting materials

•

12°

9°

12°

11°

4°

5°

* At the process connection

** High temperature = 150°C/302°F