Sensor Type |
Calibrated Accuracy |
Precision |
Reading Range |
Radial sphere of influence |
Axial Sphere of influence |
Sensor Diameter |
Soil Moisture |
R 2 ≥ 0.992 |
+/- 0.003% vol |
Oven dry to saturation |
99% of reading within first 10 cm of outside wall of access tube |
100% of reading contained within 10cm |
EnviroSCAN: 50.5mm
EasyAG: 26.5 mm |
TriSCAN |
R 2 ≥ 0.992 (moisture)
+/- 8.06% EC at 4-20% moisture range and 0-4.9 mS/cm |
+/- 0.003% vol |
Oven dry to saturation (moisture)
0-17 dS/m (salinity) |
99% of reading within first 10 cm of outside wall of access tube |
100% of reading contained within 10cm |
EnviroSCAN: 50.5mm
EasyAG: 26.5 mm |
Communication Protocol |
Maximum Sensors Per Probe |
Current consumption |
Resolution |
Operating Temperature |
Measurement time per sensor |
Access Tube Diameter |
Sentek 5-wire (RT6) |
16 |
0mA @ standby
80mA @ sampling
12 V
|
>1:10000 Moisture
>1:6000 TriSCAN |
-30 O to + 85 O Celsius |
1.1 sec |
56.5 mm |
Sentek Solo |
16 |
1mA @ sleep
120mA @ sampling
6V DC
|
>1:10000 Moisture
>1:6000 TriSCAN |
-20 O to + 75 O Celsius |
50mS Moisture
90mS TriSCAN |
56.5 mm |
Sentek Plus |
16 |
500µA @ sleep
100mA @ sampling
12V DC
|
>1:10000 Moisture
>1:6000 TriSCAN |
-20 O to + 75 O Celsius |
50mS Moisture
90mS TriSCAN |
56.5 mm |
Modbus RS232/RS485 |
16 |
500µA @ sleep
100mA @ sampling
12V DC
|
>1:10000 Moisture
>1:6000 TriSCAN |
-20 O to + 75 O Celsius |
50mS Moisture
90mS TriSCAN |
56.5 mm |
SDI-12 |
16 |
500µA @ sleep
100mA @ sampling
12V DC
|
>1:10000 Moisture
>1:6000 TriSCAN |
-20 O to + 75 O Celsius |
50mS Moisture
90mS TriSCAN |
56.5 mm |
Voltage |
8** |
0mA @ sleep
<2mA@standby
100mA @ sampling
4.5V – 15V DC
|
1:4096 |
0 O to + 70 O Celsius |
50mS Moisture
90mS TriSCAN* |
56.5 mm |
Communication Protocol |
Current consumption |
Resolution |
Operating Temperature |
Measurement time per sensor |
Access Tube Diameter |
Sentek 5-wire (RT6) |
0mA @ standby
80mA @ sampling
4.5V – 15V DC
|
>1:8500 Moisture
>1:6000 TriSCAN |
-30 O to + 85 O Celsius |
1.1 sec |
32 mm |
Sentek Solo |
1mA @ sleep
120mA @
6V DC
|
>1:8500 Moisture
>1:6000 TriSCAN |
-20 O to + 75 O Celsius |
50mS Moisture
90mS TriSCAN |
32 mm |
Sentek Plus |
500µA @ sleep
100mA @ sampling
12V DC
|
>1:8500 Moisture
>1:6000 TriSCAN |
-20 O to + 75 O Celsius |
50mS Moisture
90mS TriSCAN |
32 mm |
Modbus RS232/RS485 |
500µA @ sleep
100mA @ sampling
12V DC
|
>1:8500 Moisture
>1:6000 TriSCAN |
-20 O to + 75 O Celsius |
50mS Moisture
90mS TriSCAN |
32 mm |
SDI-12 |
500µA @ sleep
100mA @ sampling
12V DC
|
>1:8500 Moisture
>1:6000 TriSCAN |
-20 O to + 75 O Celsius |
50mS Moisture
90mS TriSCAN |
32 mm |
Voltage |
0mA @ sleep
<2mA@standby
100mA @ sampling
4.5V – 15V DC
|
1:4096 |
0 O to + 70 O Celsius |
50mS
90mS TriSCAN* |
32 mm |
Processor |
Intel 80C552 |
Memory
|
512K 100nS RAM
512K 200nS EPROM
256 x 8-bit Static CMOS EEPROM
|
Data retention |
2 days from removal of power |
I/O Capabilities
|
Proprietary communications which are
software selectable for 1200, 2400, 9600 and 19.2K Baud rates. Proprietary sensor communications.
|
On board facilities |
Clock Calendar (battery backed) |
On board power
|
Power fail detection
3.6 Volt Nickel Cadmium battery
5 Volt regulation supplied from mainboard.
|
Capability |
Maximum of sensors = 32 (2 runs of 16 sensors) |
