Level Radar LCR20
Input
20
21
-0
6
13
5
Input
5.1
Measured Variable
The measured variable is the distance between the reference point and the product surface.
The level is calculated based on
E
, the empty distance entered.
5.2
Measuring Range
Maximum measuring range
•
Device with 40 mm (1.5 inch) antenna: 15 m (49 foot)
•
Device with 80 mm (3 inch) antenna: 20 m (66 foot)
Installation requirements
•
Recommended tank height > 1.5 m (5 foot) for media with low ε
r
value
•
Open channel minimum width 0.5 m (1.6 foot)
•
Calm surfaces
•
No agitators
•
No buildup
•
Relative dielectric constant ε
r
> 4
Contact Fuchs for lower ε
r
values
Usable measuring range
The usable measuring range depends on the antenna size, the medium's reflective properties,
the installation position and any possible interference reflections.
Media groups
•
ε
r
= 4 to 10
e. g. concentrated acid, organic solvents, ester, aniline, alcohol, acetone.
•
ε
r
> 10
e. g. conductive liquids, aqueous solutions, diluted acids and bases
Reduction of the maximum possible measuring range by:
•
Media with bad reflective properties (= low ε
r
value)
•
Formation of buildup, particularly of moist products
•
Strong condensation
•
Foam generation
•
Freezing of sensor
5.3
Operating Frequency
K-band (~ 26 GHz)
5.4
Transmission Power
Mean power density in the direction of the beam
•
At a distance of 1 m (3.3 foot): < 12 nW/cm
2
•
At a distance of 5 m (16 foot): < 0.4 nW/cm
2
