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The lightweight NivuFlow Stick profiler is easily transportable and ready for use within seconds. Measurements are easy to take using a smartphone or a tablet.
Even users who have never used this instrument before can, with a brief introduction to its operation, quickly start making accurate and reliable measurements.
The NivuFlow Stick is has no moving parts and is maintenance free. The compact size and weight of this robust instrument has been optimized to ensure easy and safe handling in water courses.
Both live and stored data can be read via a wireless connection whilst still on site, with access to previous measurements also available. Integral data and measurement quality checks are displayed and stored for each measurement to ensure optimum operation every time. The NivuFlow Sticks ease of use and speed of measurement is a global first for manual current meter gauging instrumentation.
Acoustic reflectors including sediment particles and air bubbles that are present in the water are scanned and with ultrasonic pulses and the reflected receive signals stored as echo patterns.
Further ultrasonic scans are performed every few milliseconds and consecutive echo patterns are compared to determine the particulate movements, and thus water velocity, within the measurement window. A full water depth velocity profile is determined by analysing these measurements in up to 16 vertical slices or layers.
|Measurement principle||• Ultrasound crosscorrelation with real flow profile measurement (flow velocity)|
• Hydrostatic (depth measurement relative to atmospheric pressure)
|Measurement range||Velocity: -100 cm/s to + 600 cm/s|
|Resolution||Depth measurement: 1 mm|
|Accuracy||< 0.5 % of full scale|
|Acoustic frequency||1MHz – 3MHz|
|Minimum water depth for accurate velocity measurement||30 mm|
|Temperature measurement||resolution 0.1°C, accuracy 0.1°C|
|Data memory||1400 discharge measurements|
|Data transmission||Wireless download|
|Power supply||8xAA batteries or rechargeable battery|
|Lifetime||12h permanent use (for operation with 2650 mAh batteries)|
Specifications subject to change.