Level measurement

102 Continuous level measurement in bulk solids

1. Overview of the measuring principles

A

Segmentation

Point level

Continuous

Liquids

Vibronics Conductive Capacitance Float switch Radiometrics

Radar Guided radar Ultrasonics Hydrostatics (p + dp)

Capacitance Radiometrics

Bulk solids

Vibronics Capacitance Paddle Microwave barrier Radiometrics

Radar Guided radar Ultrasonics Electromechanical level system Radiometrics

Process conditions*

Silo height (m/ft) Radar

70/230 50/164 45/148 40/131

Electromechanical level measurement

Ultrasonics

35/115

Guided radar

20/0.79

> 50/1.97

Grain size (mm/")

* Radiometry not depicted Non-contact measurement from outside and, therefore, no application limits.