Table 2.

Allocation and technical overview of sensors attached to buoy during test operation. Logging interval for all sensors is ∂t = 15 min.

Type of Sensor	Parameter[Range/Accuracy]	Type of Assembly	Allocation Relative to Water Body
FTS DTS-12 (Nephelometric turbidity sensor)	Turbidity [0–1600 NTU (nominal)/±2% of reading (0–399 NTU), ±4% of reading (400–1,600 NTU)] and water temperature[0 °C–40 °C/±0.2 °C]	At different water depths along measurement chain	Water depths along measurement chain in meters: 1, 2, 3, 5, 7, 10, 13, 17, 23
CS547 A-L	Electrical conductivity [approx. 0.005–7.0 mScm−1/±5% of reading 0.44 to 7.0 mScm−1and ±10% of reading 0.005–0.44 mScm−1 for standard solutions] and water temperature [0 °C–50 °C/±0.4 °C]	At different water depths along measurement chain	Water depths along measurement chain in meters: 1, 2, 3, 7, 10, 13, 17
Nortek Aquadopp Current Meter (acoustic Doppler current meter at 2 MHz)	Flow speed [±5 ms−1/1% of measured value ±0.5 cms−1]and flow direction [Azimuth: 360°/2°/resp. 0.1° for tilt <20°]	Attached to MB of buoy	0.3 m water depth with a measurement cell size of 0.75 m
Nortek Aquadopp Profiler (acoustic Doppler current profiler at 400 kHz)	Flow speed [±10 m/s/1% of measured value ±0.5 cm/s] and flow direction [Azimuth: 360°/2°/resp. 0.1° for tilt <20°]	Attached to MB of buoy	0.5 m water depth with 1.0 m blanking distance and with measurement cell size of 2 m; resulting measurement range is from 1.5 to 21.5 m
RM Young Wind Monitor	Wind speed [0–100 ms−1/[± 0.3 ms−1 or 1% of measured value] and wind direction [Azimuth: 360° mechanical, 355° electrical (5° open)/±3°]	Attached to mast of buoy	2.5 m above water surface
UMS TempRH	Air temperature [−40 °C–80 °C] and relative humidity [0%–100% rH/0.01 kPa]	Attached to mast of buoy	2.0 m above water surface