Level measurement

127 Instrument selection within the measuring principle

Sensor alignment • Angled surfaces are formed in silos for bulk solids. These cause the ultrasonic signal to be laterally reflected which can lead to a reduced signal intensity Remedial measures: The sensors should be aligned as vertically as possible in relation to the product surface This is facilitated by the FAU40 alignment device or the assembly bracket

Advantages • Non-contact, maintenance-free measurement • density, etc. • Calibration without filling or discharging • Self-cleaning effect of sensors due to moved sensor diaphragm • Separate instrumentation options in rough ambient conditions • Cost-effective instrumentation for silo farms with FMU95 multichannel system

C

FAU40 for Prosonic

Installation with assembly bracket for Prosonic

Range calculation and sensor selection Prosonic M FMU4x

R [m/ft]

20/65

FMU44

10/32

Example (for FMU43): • Product surface hard, rough: • Low dust generation: • Small quantities of filling curtain in the detection range: Total: range approx. 7m/23ft from diagram

FMU42

7/23 8/26

+40dB +5dB +5dB +50dB

FMU41

5/16

FMU40

1/3.2

10 20 30 40 50 60 70 80

A [dB]