Performance
Field sensitivity
The signal is applied to the upper ring of each pair, so the
electromagnetic field is stronger around the upper ring.
Although this field extends a considerable distance into the soil
(~100mm), it is strongest close to the rings, and so the soil close
to the rings contributes most to the output.
Normalised sensitivity versus sample radius
0
0.2
0.4
0.6
0.8
1
0
20
40
60
80
100
120
140
160
Radius of sample cylinder (mm)
Output (V
out
/V
ma
x
)
Damp Soil
Salinity
The Profile Probe output has been tested as follows:
PR2 conductivity response
0.0
10.0
20.0
30.0
40.0
50.0
60.0
0
100
200
300
400
500
600
Pore Water Conductivity (mS.m-1)
PR2 out
pu
t (
%
v
ol
)
PR2 in wet soil
ideal response in wet soil
PR2 in damp soil
ideal response in damp soil
Pro
file
Prob
e
Profile Probe User Manual
3.0a
Technical reference
z
27
