Introduction
Description
The
Profile Probe
measures soil moisture content at different
depths within the soil profile. It consists of a sealed
polycarbonate rod, ~25mm diameter, with electronic sensors
(seen as pairs of stainless steel rings) arranged at fixed intervals
along its length.
When taking a reading, the probe is inserted into an access
tube. The access tubes are specially constructed thin-wall
tubes, which maximise the penetration of the electromagnetic
field into the surrounding soil.
The output from each sensor is a simple analogue dc voltage.
These outputs are easily converted into soil moisture using the
supplied general soil calibrations or the probe can be calibrated
for specific soils.
Advantages
The
Profile Probe
is dual-purpose
each probe can be used
both
for portable readings from
many access tubes
and
for installation within one access
tube for long-term monitoring.
Fully sealed and robust.
High accuracy: ±4%.
Easy installation with minimal soil disturbance.
Large sampling volume ~ 1.0 litres at each profile depth.
olts
Works reliably even in saline soils.
Simple analogue output, 0 to ~1.0 V
4
z
Introduction
Profile Probe User Manual
3.0a
