10
Videos and experiment examples:
Videos, literature and other probes can be
Technical background:
The philosophy behind Edu-Logger’s plug and play
technology is based on each sensor’s ability to store its
own data due to an internal flash memory chip and
micro-controller in each plastic Edu-Logger body.
This technology allows the sensor to collect and then
store the digital data in the correct scientific units (
o
C,
o
F, Lux, %, ppm, for example).
The sensor is pre-calibrated at the factory. The built-in
software in the logger can be upgraded at any time
using software.
On the salinity probe there are two electrodes of
known surface area with a known distance between
them which allows for the sensor to determine the
salinity of solutions.
The electrodes located on the salinity probe have an
electrical potential difference applied to them to
generate a current through the solution. If ions are
present, the current will flow between the electrodes.
Current flows through solutions via ion transport,
therefore the higher number of ions present in a
solution the easier an electrical current can flow and a
higher salinity value will be measured.
The electrodes alternate polarities to prevent a total
ion migration to either pole which could cause
polarization and electrolysis.
