Device Description HG G-98780-A | English, Revision 16 | Date: 15.07.2021
48
Chapter 10 – Appendix
10.4 Influence of Water
Reading height was 80 mm [
3.15 in] in all cases. The signal strength level at this
distance in air represents 100 % in the following measurements. The water level
was measured from the bottom of the transponder. The transponder top was also
moist during the measurement with 30 mm water level (splash water). A road salt/
water mixture was used for emulating natural seawater. For comparison, seawater
has a conductivity of about 42 to 55 mS/cm. Through evaporation a salt crust can
form on the transponder top which then leads to punctual higher conductivity.
Figure 34
Attenuation of the sum voltage as a function of the conductivity of the water (30 mm
water level)
Figure 35
Attenuation of the sum voltage as a function of the conductivity of the water (75 mm
water level)
Install the transponder slightly elevated, so that it will not be completely submerged
under salt-saturated water.
Conductivity of the water [mS/cm]
Su
m
v
olt
ag
e [
%
]
Conductivity of the water [mS/cm]
Su
m
v
olt
ag
e [
%
]
