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Level Radar LCR20
Input
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
•
Open channel minimum width 0.5 m (1.6 foot)
•
Calm surfaces
•
No agitators
•
No buildup
•
Relative dielectric constant ε
Contact Pepperl+Fuchs for lower ε
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
= 4 to 10
r
e. g. concentrated acid, organic solvents, ester, aniline, alcohol, acetone.
•
ε
> 10
r
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
•
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
•
At a distance of 5 m (16 foot): < 0.4 nW/cm
> 4
r
values
r
value)
r
2
2
value
r
13
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