SECTION 4. SENSOR INSTALLATION
4-8
4.15 SR50 SONIC RANGING SENSOR
The SR50s mounting stem enables various
installation options. A 3/4" x 1" NU-RAIL (CSI
part number 1049) enables the SR50 to mount
to a horizontal 3/4" pipe. The mounting stem
also has 1" pipe thread to accommodate other
threaded installation options. The UT018
crossarm and part number 6880 bracket can be
used to mount the SR50 to 3/4" - 1.25" diameter
vertical pipe.
The SR50 should be mounted perpendicular to
the target surface, without obstructions. See
Figure 4.15-1.
FIGURE 4.15-1. SR50 Sonic Ranging Sensor
4.16 CS615 WATER CONTENT
REFLECTOMETER
Probe rods can be inserted vertically or
horizontally into the soil surface, as shown in
Figure 4.16-1, or buried at any orientation to the
surface. A probe inserted vertically into a soil
surface will give an indication of the water
content in the upper 30 cm of soil. Horizontal
installation will detect the passing of wetting
fronts. Insertion at a 30 degree angle with the
surface will measure water content in the upper
15 cm of soil.
Probes must be inserted such that no air voids
are created around the rods, and that the rods
remain as parallel as possible. Use the
CS615G probe insertion guide to minimize
errors due to improper insertion.
The standard calibration for the CS615 probe,
as programmed in Short Cut, is valid for loamy
soils with low organic content. In other types of
soils, reporting the output in units of period will
make it possible to apply your own calibration
during post processing of data.
1
2
FIGURE 4.16-1. CS615 Water Content
Reflectometer with
CS615G Probe Insertion Guide
UT018
PN 6880
PN 1049
SR50
