Table 8. Specifications of sensors used in water quality parameter measurements.
Instrument type
Sensor
Accuracy
Resolution
0.15C
0.01C
Hydrolab
Temperature
0.2 units
(H2O Multiprobe)
pH
0.01 units
Specific conductance
0.0015 to 0.1 mS/cm*
Fresh water
0.001 mS/cm
0.15 to 1.0 mS/cm*
Salt water
0.01 mS/cm
0.2 ppt
Salinity
0.1 ppt
0.2 ppm
Dissolved oxygen
0.01 ppm
20 mV
Redox
1 mV
0.45 m water
Depth
0.1 m water
0.02C
0.01C
CRREL thermistor
Temperature
0.008 m water
Druck (PDCR 950)
Pressure (water depth)
0.001 m water
100 mV
OBS-3
Turbidity
1 mV
5 V = 2000 FTU
6.10 cm/s
Marsh-McBirney
Water current (velocity)
2.13 cm/s
(model 512)
1 cm
Cambell Ultrasonic
Distance (water depth)
0.05 cm
(model UDG01)
0.003 m water
Seagauge wave/tide
Pressure (water depth)
0.0015 m water
0.02C
0.01C
(model SBE 26-03)
Temperature
0.75 m water
Seacat CTD
Pressure (water depth)
0.045 m water
0.01C
0.001C
(model SBE 19-03)
Temperature
0.001 S/m
0.0001 S/m
100 mV
OBS [5 V = 2000 FTU]
3 mV
* Depends on which of three auto-adjusting ranges is employed.
Coast
Mortar
Bread Truck
In- between
Coastal 6
Parachute
Spring Gully
Tanker
B-Gully
BRt.
B ravo
ridge
Otter Gully
N
River
C tter
O
Hydrolab & ISCO Water Sampler
reek
I ydrolab
C CO
S
WD
T
Wave & Tide Gauge
eather Station
Figure 16. Locations of instrumenta-
tion recording water quality param-
0
500 m
eters and water depths.
18
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