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)