Galvanic Cell Type Sensor for Soil Moisture Analysis
Pramod Gaikwad
Mruthyunjayachari
Chattanahalli Devendrachari
Ravikumar Thimmappa
Bhuneshwar Paswan
Alagar Raja Kottaichamy
Harish Makri Nimbegondi
Kotresh
Musthafa Ottakam Thotiyl
10.1021/acs.analchem.5b01653.s001
https://acs.figshare.com/articles/journal_contribution/Galvanic_Cell_Type_Sensor_for_Soil_Moisture_Analysis/2147866
Here we report the first potentiometric
sensor for soil moisture
analysis by bringing in the concept of Galvanic cells wherein the
redox energies of Al and conducting polyaniline are exploited to design
a battery type sensor. The sensor consists of only simple architectural
components, and as such they are inexpensive and lightweight, making
it suitable for on-site analysis. The sensing mechanism is proved
to be identical to a battery type discharge reaction wherein polyaniline
redox energy changes from the conducting to the nonconducting state
with a resulting voltage shift in the presence of soil moisture. Unlike
the state of the art soil moisture sensors, a signal derived from
the proposed moisture sensor is probe size independent, as it is potentiometric
in nature and, hence, can be fabricated in any shape or size and can
provide a consistent output signal under the strong aberration conditions
often encountered in soil moisture analysis. The sensor is regenerable
by treating with 1 M HCl and can be used for multiple analysis with
little read out hysteresis. Further, a portable sensor is fabricated
which can provide warning signals to the end user when the moisture
levels in the soil go below critically low levels, thereby functioning
as a smart device. As the sensor is inexpensive, portable, and potentiometric,
it opens up avenues for developing effective and energy efficient
irrigation strategies, understanding the heat and water transfer at
the atmosphere–land interface, understanding soil mechanics,
forecasting the risk of natural calamities, and so on.
2015-07-21 00:00:00
understanding soil mechanics
potentiometric sensor
1 M HCl
water transfer
irrigation strategies
nonconducting state
redox energies
battery type discharge reaction
soil moisture analysis
Galvanic Cell Type Sensor
warning signals
art soil moisture sensors
polyaniline redox energy changes
end user
moisture sensor
output signal
Soil Moisture AnalysisHere
moisture levels
battery type sensor
aberration conditions
Galvanic cells
voltage shift
soil moisture
probe size