VEGA VEGAPULS 51K…54K Profibus PA - Manual (Page 5)

VEGAPULS 51P … 54P 5
24890-EN-041227
Product description
Reflected radar power dependent on the dielectric
constant of the measured product
Temperature influence: Temperature error absolutely
zero (e.g. at 500°C 0.018 %)
Pressure influence: Error with pressure increase very
low (e.g. at 50 bar 1.44 %)
100 500 1000 1300 ˚C 0
0
0,01
0,02
0,03
%
0,018 %
0,023 %
10
0
0
5
%
1,44 %
2,8 %
10
50 20 30 40 60 100 70 80 90 110 120 130 140 bar
0,29 %
3,89 %
2
0
0
10
25 %
40 %
5
10
5 %
20
30
40
50
%
4 6 8 12 14 16 18
20
ε
r
All products which are electrically conductive
reflect radar signals very well. Even slightly
conductive products provide a sufficiently
strong reflection for a reliable measurement.
All products with a dielectric constant
ε
r
greater than 2.0 reflect radar pulses suffi-
ciently (note: air has a dielectric constant
ε
r
of
1).
Signal reflectivity grows stronger with in-
creasing conductivity or increasing dielectric
constant of the product. Hence, nearly all
products can be measured.
With standard flanges of DN 50 to DN 250.
ANSI 2“ to ANSI 10“ or G 1
1 /
2
A and 1 1 /
2
“ NPT,
the sensor antenna systems can be adapted
to various products and measuring environ-
ments.
The high-quality materials can also withstand
extreme chemical and physical conditions.
The sensors deliver stable, reproducible
analogue or digital level signals with reliability
and precision.
VEGAPULS 50 sensors allow radar level
measurement with radar in plants where it
was hitherto unthinkable because of high
cost.
Continuous and reliable
Unaffected by temperature, pressure and
atmosphere content, VEGAPULS radar sen-
sors are used for quick and reliable continu-
ous level measurement of widely varying
products.