OTT Q Liner2 ADCP Boat

Acoustic Doppler Current Profiler for surface water discharge measurement

Categories: , Tags: , ,

OTT Qliner 2 – Doppler technology for mobile discharge measurement in rivers and channels.  The measurement is carried out using the classic verticals process. At the required vertical positions, the Qliner 2 measures both the vertical velocity distribution and the water depth. All measured data are transferred to the PDA via Bluetooth. After the measurement is complete, the discharge is available immediately. The Qliner 2 can be operated easily on cable ways, from bridges or from the edge.

  • Spot
  • Acoustic
  • Flow velocity and depth
  • Acoustic water profiling instrument for section by section discharge measurements in rivers and open channels up to 20 m water depth. Operated by PDA user software with Bluetooth data transmission. Low flow resistance and high boat stability.
  • ± 10 m/s
  • ± 1% of measured value ± 0.5 cm/s


Reliable and precise ultrasound Doppler profiler

  • Intelligent evaluation algorithms
  • Discharge calculation according to internationally recognized standards (EN ISO 748)
  • GPS or bottom tracking data are not required
  • No measurement problems with a moving bottom
  • Ideal for small and medium-sized rivers
  • For measurements in case of flooding
  • No moving parts that could be blocked or jammed during measurement
  • Familiar measurement process, therefore easy to learn

Examples of Use

Discharge measurements for small and medium-sized river

  • Can be operated easily on cable ways, from bridges or from the edge.


OTT Qliner 2 – CE Konformitätserklärung | Declaration of Conformity | Declaration de Conformité
Operating instructions Mobile River Discharge Measurement System OTT Qliner 2
Brochure – OTT Discharge – Mobile measurement systems
Leaflet – Mobile Ultrasonic Doppler Discharge measurement system – OTT Qliner 2
Qliner PDA Software – EN
OTT QReview – EN

Technical Data

Water velocity measurement
Measuring range ± 10 m/s
Resolution 1 mm/s
Accuracy ± 1% of measured value ± 0.5 cm/s
Temperature measurement
Measuring range -4 … 40 °C
Resolution 0.01 °C
Accuracy ± 0.1 °C
Doppler sensor
Accoustic frequency 2 MHz / 1 MHz
Cell size 0.1 … 2 m / 0.3 … 4 m
Water depth range 0.35 … 10 m / 1.20 … 20 m
Maximum number of cells 40
Batteries boat/PDA
Nominal charge 4 Ah / 5.2 Ah
Voltage 12 V DC / 3.8 V DC
Operating time typically 24 h
Radio connection
Frequency 2.4 GHz
Type Bluetooth, Class 1
Range up to 150 m (depending on environm. conditions)
Material glass fiber
Size (L x W x H) 957 mm x 482 mm x 255 mm
Weight 11.1 kg
Type Nomad (TimbaTec)
Size (L x W x T) 175 mm* x 100 mm x 50 mm
*with antenna 275 mm
Weight 620 g
Transport case
Size (L x W x H) 1,030 mm x 580 mm x 370 mm
Weight 19.5 kg – empty, 32 kg – complete
Protection class
Boat above waterline IP67
System environmental conditions
Operating temperature -10 … +60 °C
Storage temperature -20 … +70 °C
Shock and vibration DIN ISO 2206 / DIN ISO 2248
“Qliner für Pocket PC” software
Operating system Windows Mobile
Functions deployment planning, online data collection, data retrieval, ASCII conversion, graphical display
“Qreview” software for PC
Operating system Microsoft Windows
Functions data processing, storage, export

Download PDF