RiverSurveyor M9

It’s an immense goal – to build a river discharge measurement system without the traditional limitations. It had to be small, portable and so easy to use that anyone could make a measurement. It had to be so robust that it could be used just about anywhere in the world under extreme conditions. The results had to be immediately recognisable. Conceived to advance measurement practices, the RiverSurveyor S5 and M9 systems give a whole new perspective to the notion of open channel hydraulic measurements.

• Multiple acoustic frequencies* Combines the highest resolution with the greatest range of depths
• Vertical acoustic beam* Superior channel definition, extends the maximum measurable discharge depth
• Automated cell size* Always uses the optimal resolution for channel depth – no user input required.
• Automated pulse scheme and frequency hopping* Automatically adjusts the acoustic Doppler sampling (ping) scheme for channel conditions. User does not need to pre-program unit.
• Microprocessor computed discharge and secure data* All discharge computations are done within the S5 or M9 unit internally (not in the computer!) – No lost data from communications drop outs
• Standard 360º compass and two-axis tilt sensor Compensates for vessel motion due to surface conditions.
• Reverberation control with ping rates to 70Hz High ping rates ensure extremely robust data collection.
• Pulse-coherent processing Maximizes high resolution performance in shallow water.
• Bottom-tracking High precision vessel tracking and depth measurement without GPS requirement
• RTK GPS (optional) Ultra precise earth-referenced positioning as an alternative to bottom tracking in moving bed or other difficult situations.

M9 SPECIFICATIONS
Velocity Measurement
-Profiling Range (Distance) 0.06m to 40m
-Profiling Range (Velocity) +/- 20 m/s
-Accuracy Up to +/- 0.25% of measured velocity; +/- 0.2cm/s1
-Resolution 0.001 m/s
-Number of Cells Up to128
-Cell Size 0.02m to 4m

Transducer Configuration Nine (9) Transducers; Dual 4-Beam 3.0 MHz/1.0 MHz Janus at 25º Slant Angle; 0.5 MHz Vertical Beam

Depth Measurement
-Range 0.20m to 80m
-Accuracy 1%
-Resolution 0.001m

Discharge Measurement
-Range with Bottom-Track 0.3m to 40m
-Range with RTK GPS 0.3m to 80m
-Computations Internal

Ordering Information:
RS-M9 RiverSurveyor M9 System
Portable nine-beam 3.0 MHz/1.0 MHz/0.5 MHz acoustic Doppler profiler/discharge measurement system intended for use from moving boats and other floating platforms in medium depth channels. System is provided in a 5 inch (13 cm) diameter Delrin housing and consists of a dual Janus configuration with four 3.0 MHz and four 1.0 MHz transducers for velocity measurement, one 500 kHz vertical acoustic beam for depth measurement, compass/2-axis tilt sensor, temperature sensor, and 8 GB recorder. Features bottom tracking, internal discharge calculation, RiverSurveyor Live! Windows software for real-time display of current profiles, bathymetry and computed discharge measurements, and DGPS interface. System includes power supply and shipping case.

Optional Parts
36-0001-010 10m power & RS232 serial communications cable
6054-60501 1-year extended manufacturer warranty on defects and workmanship
PCM-BASIC 2.4 GHz Telemetry / External Power Module for remote data collection.
PCM-DGPS 2.4 GHz Telemetry / External Power / SonTek DGPS Module for remote data collection.
PCM-RTK 2.4 GHz Telemetry / External Power / SonTek RTK GPS Module for remote data collection.
28-0108 SonTek Hydroboard II for RiverSurveyor S5 and M9 systems, 51-in (130-cm) length, 16.4 ft/s (5.0 m/s) maximum velocity.
24-0260 SonTek Hydroboard II soft carrying case
24-0008-02 Oceanscience Group Riverboat trimaran for RiverSurveyor S5 and M9 ADP systems