1 current drain, 2 sensors specifications, 1 volumetric water content measurement – Campbell Scientific HS2 and HS2P (HydroSense II) User Manual
Page 15: 2 physical, 3 hs2p pole assembly, Current drain, Sensors specifications, Volumetric water content measurement, Physical, Hs2p pole assembly
HS2 and HS2P
Dimensions:
200 x 100 x 58 mm (7.9 x 3.9 x 2.3 in)
Source:
4 x AA alkaline batteries
Battery life:
6 to 12 months (depends on usage and battery
quality)
5.1.1 Current Drain
Asleep:
20 μA
Backlight off:
2 mA
Backlight 60%:
18 mA
Backlight 100%:
30 mA
GPS active:
35 mA
Bluetooth active:
30 mA
5.2 Sensors Specifications
5.2.1 Volumetric Water Content Measurement
Measurement principle:
time domain reflectometry
Measurement range:
0% – 50%
Precision:
<0.05%
Accuracy:
±3% VWC in mineral soils
with solution EC ≤4.0 dS/m (20 cm rods)
with solution EC ≤6.5 dS/m (12 cm rods)
5.2.2 Physical
Weight:
0.45 kg (0.99 lb)
Sensor body dimensions
(L x W x H):
100 x 92 x 40 mm (3.9 x 3.6 x 1.6 in)
Rod length:
20 cm and 12 cm, rods not interchangeable
Rod diameter:
4.7 mm (nominal)
5.3 HS2P Pole Assembly
Handle width:
29.2 cm (11.5 in)
Pole width:
2.5 cm (1 in)
Pole depth:
2.5 cm (1 in)
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