Campbell Scientific HS2 and HS2P (HydroSense II) - Manual (Page 12)

HS2 and HS2P
Sensor rod length 20 cm and 12 cm
(NOT interchangeable) 20 cm and 12 cm
(interchangeable)
Accuracy 20 cm rods: ±3%
(EC ≤ 4 dS/m)
12 cm rods: ±3% (EC≤
6.5 dS/m)
±3% VWC
(EC < 2 dS/m)
GPS and geotagging Yes No
GPS zones Yes No
Data storage Yes (1000+ readings) No
Bluetooth Yes No
Date and time Yes (with GPS accuracy
when available)
No
Display 128 x 64 pixel graphic
LCD
2 line x 16 char
alphanumeric LCD
LCD backlight Yes No
Firmware updates User updateable Factory only
Field carry case Yes No
Portable Yes Yes
Battery life 1000+ readings 2000+ readings
Unlike the HydroSense (I), the 12 cm and 20 cm rods of the
HydroSense II are not interchangeable.
The HydroSense II can display relative water content (RWC) based on wet and
dry references set by the user. The unit also displays water deficit, which
indicates how much water is required (in mm of applied water) to return the
soil to the previously saved wet reference.
Measurements are made by fully inserting the sensor rods into the soil and
pressing
. The process takes 2 to 3 seconds. The measurement can be
stored and later downloaded to a computer for display and analysis.
Communications between the computer and HydroSense II are via Bluetooth
(p. 18). The HydroSense II includes a GPS (Global Positioning System)
(p. 19) receiver that enables data to be stored with position information
( geotagged (p. 19)).
The HydroSense II has these default power saving features:
• turns off when idle for a configurable period
• adjustable backlight brightness and on-time
• backlight automatically disabled in bright conditions
• GPS and Bluetooth can each be forced off.
NOTE
4