28-03-2014, 02:55 PM
Soil Moisture Sensor
[attachment=60592]
Introduction
Thank you for choosing the 10HS soil water content sensor. This in-
novative sensor will enable you to monitor volumetric water content
of soil accurately and affordably. This manual is designed to help you
understand the sensor’s features and how to use this device success-
fully.
Seller’s Liability
Seller warrants new equipment of its own manufacture against de-
fective workmanship and materials for a period of one year from
date of receipt of equipment (the results of ordinary wear and tear,
neglect, misuse, accident and excessive deterioration due to corro-
sion from any cause are not considered to be a defect); but Seller’s
liability for defective parts shall in no event exceed the furnishing
of replacement parts f.o.b. the factory where originally manufac-
tured. Material and equipment covered hereby which is not man-
ufactured by the Seller shall be covered only by the warranty of its
manufacturer. Seller shall not be liable to Buyer for loss
About the 10HS
The 10HS measures the dielectric constant of the soil in order
to find its volumetric water content (VWC). Since the dielec-
tric constant of water is much higher than that of air or soil
minerals, the dielectric constant of the soil is a sensitive mea-
sure of volumetric water content. The 10HS has a low power
requirement and very high resolution. This gives you the abil-
ity to make as many measurements as you want (i.e. hour-
ly) over a long period of time with minimal battery usage.
Background Info
In 2005, the Decagon research team optimized a sensor oscillator fre-
quency for very high accuracy soil moisture measurements. The first sen-
sor to incorporate the new frequency was our EC-5 sensor. It quickly
became the most popular soil moisture sensor we’ve designed. The new
10HS sensor uses the same 70MHz oscillator frequency as the EC-5 but
has a larger soil volume and requires no special calibration when used
with other systems.
Installing the Sensor
When selecting a site for installation, it is important to remem-
ber that the soil adjacent to the sensor surface has the strongest
influence on the sensor reading and that the sensor measures the
volumetric water content of the soil. Therefore any air gaps or
excessive soil compaction around the sensor and in between the
sensor prongs can profoundly influence the readings. Also, do not
install the sensors adjacent to large metal objects such as metal
poles or stakes. This can attenuate the sensor’s electromagnetic
field and adversely affect readings. In addition, the 10HS sen-
sor should not be installed within 5 cm of the soil surface, or
the sensing volume of the electromagnetic field can extend out
of the soil and reduce accuracy.
[attachment=60592]
Introduction
Thank you for choosing the 10HS soil water content sensor. This in-
novative sensor will enable you to monitor volumetric water content
of soil accurately and affordably. This manual is designed to help you
understand the sensor’s features and how to use this device success-
fully.
Seller’s Liability
Seller warrants new equipment of its own manufacture against de-
fective workmanship and materials for a period of one year from
date of receipt of equipment (the results of ordinary wear and tear,
neglect, misuse, accident and excessive deterioration due to corro-
sion from any cause are not considered to be a defect); but Seller’s
liability for defective parts shall in no event exceed the furnishing
of replacement parts f.o.b. the factory where originally manufac-
tured. Material and equipment covered hereby which is not man-
ufactured by the Seller shall be covered only by the warranty of its
manufacturer. Seller shall not be liable to Buyer for loss
About the 10HS
The 10HS measures the dielectric constant of the soil in order
to find its volumetric water content (VWC). Since the dielec-
tric constant of water is much higher than that of air or soil
minerals, the dielectric constant of the soil is a sensitive mea-
sure of volumetric water content. The 10HS has a low power
requirement and very high resolution. This gives you the abil-
ity to make as many measurements as you want (i.e. hour-
ly) over a long period of time with minimal battery usage.
Background Info
In 2005, the Decagon research team optimized a sensor oscillator fre-
quency for very high accuracy soil moisture measurements. The first sen-
sor to incorporate the new frequency was our EC-5 sensor. It quickly
became the most popular soil moisture sensor we’ve designed. The new
10HS sensor uses the same 70MHz oscillator frequency as the EC-5 but
has a larger soil volume and requires no special calibration when used
with other systems.
Installing the Sensor
When selecting a site for installation, it is important to remem-
ber that the soil adjacent to the sensor surface has the strongest
influence on the sensor reading and that the sensor measures the
volumetric water content of the soil. Therefore any air gaps or
excessive soil compaction around the sensor and in between the
sensor prongs can profoundly influence the readings. Also, do not
install the sensors adjacent to large metal objects such as metal
poles or stakes. This can attenuate the sensor’s electromagnetic
field and adversely affect readings. In addition, the 10HS sen-
sor should not be installed within 5 cm of the soil surface, or
the sensing volume of the electromagnetic field can extend out
of the soil and reduce accuracy.