9
Reference Manual
00809-0100-4026, Rev KC
Introduction
October 2018
Introduction
Solid surface
The surface of solid materials is rarely flat or horizontal. The surface inclination will change as the vessel
fills and empties. There is often a lot of dust during the fill cycle. The dielectric value of many solids is
fairly low. See Table 2-1 on page 9 for common solids characteristics.
For solids applications, the high frequency version Rosemount 5402 with 4-in. (101.6 mm) cone or
parabolic antenna is available.
Table 2-1. Sample Solids Applications
(1)
1. Air purging might be needed in dusty environments.
Applications
Common characteristics
Particle size Vapor space
Dust or
powder
Small
(<1 in.)
Larger
(>1 in.)
Dust
Steam or
condensation
Wood chip bins Yes Yes Yes Yes Possible
Grain silo - small kernel
grains
Yes Yes No Yes No
Grain silo - large kernel
grains
No Yes No No No
Lime stone silo No Yes Yes Possible No
Cement - raw mill silo Yes Yes No Yes No
Cement - finished
product silo
Yes Yes No Yes No
Coal bin Yes Yes Yes Yes Yes
Saw dust Yes Yes No Yes No
High consistency - pulp
stock
No No No No Yes
Alumina Yes Yes No Yes No
Salt No Yes Yes No No
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