-60-
v7.2
Sensors probes
4.9.1.
Specifications
General specifications
•
Operating temperature: -40 to 60 ºC
•
Dielectric measurement frequency: 70 MHz
•
Measurement time: 150 ms
•
Dimensions: 9.3 x 2.4 x 6.5 cm
•
Prong length: 5.5 cm
•
Cable length: 5 m
Volumetric water content
•
Accuracy: ε
a
: ±1 ε
a
(unitless) from 1 to 40 (soil range), ±15% from 40 to 80
•
Resolution:
-
0.1 ε
a
(unitless) from 1 to 20
-
< 0.75 ε
a
(unitless) from 20 to 80
-
0.002 m
3
/ m
3
(0.2% VWC) from 0 to 40% VWC
-
0.001 m
3
/ m
3
(0.1% VWC) > 40% VWC
•
Range: Apparent dielectric permittivity (ε
a
): 1 (air) to 80 (water)
Bulk electrical conductivity
•
Accuracy: ± 5% from 0 to 5 dS/m, ±10% from 5 to 23 dS/m
•
Resolution: 0.001 dS/m from 0 to 23 dS/m
•
Range: 0 to 25 dS/m (bulk)
Temperature
•
Accuracy: ±1 ºC
•
Resolution: 0.1 ºC
•
Range: -40 to 60 ºC
4.9.2. Measurement process
The GS3 sensor provides a digital signal using the SDI-12 protocol.
Reading code:
{
// 1. Declare an object for the sensor
Decagon_GS3 mySensor(XTR_SOCKET_A);
// 2. Turn ON the sensor
mySensor.ON();
// 3. Read the sensor. Values stored in class variables
// Check complete code example for details
mySensor.read();
// 4. Turn off the sensor
mySensor.OFF();
}