ChannelMaster Horizontal ADCP

ChannelMaster HADCP 2-beam Horizontal Broadband ADCP Smaller cells More cells Lower noise Lower power Better data

ChannelMaster HADCP Applications Rivers – Index Velocity Method Velocity, stage, discharge monitoring Used where simple stage-discharge relationship fails Backwater Tidal Locked navigation channels Pumped canal systems

ChannelMaster HADCP Applications Ports and Harbors and Waterways Design – monitor currents before construction Operation Vessel traffic safety - currents Docking

ChannelMaster HADCP Applications Environmental Velocity or flow triggered sampling Velocity, flow warning Hydraulics Research Circulation studies in lakes, estuaries Large scale turbulence in rivers

ChannelMaster HADCP Applications Offshore Monitor current near oil rigs or drill ships Monitor current near mooring buoys Research

ChannelMaster Description 2 profiling beams x-y velocity components 1-128 cells Select what is best for your application Narrow beam angle – ± 20 degrees Increases range Better signal/noise ratio than 25 deg. Reduced boundary interference More homogeneous flow

ChannelMaster Description Standard sensors Temperature – need for speed of sound Pitch and Roll – need for installation Depth 600 kHz vertical acoustic beam ± 2mm accuracy Pressure – ‘reality check’ for acoustic

ChannelMaster Description Communications RS-232/RS-422 SDI-12 Standard - 27 values per measurement One instrument at a time Concurrent – 20 values per request Simultaneous instruments

ChannelMaster Description Internal 2 MB recorder 9-18 Vdc power, external 25 meter cable Mounting plate included Allows removal and replacement without losing alignment

Competitor Comparison

Why Buy RDI? Performance Patented Broadband processing For same cell size, reach same accuracy in less time, with less energy For same energy, get better accuracy Use smaller cells where necessary Get more cells for detail if desired >15 pings/second with 1200 kHz All beams pinged simultaneously

Why Buy RDI? Flexibility One RDI can cover a wide range of applications Smaller minimum cells allows use in more shallow water More cells allows use in wider channels

Why Buy RDI? Versatility 1200 kHz ChannelMaster matches or beats the maximum range and minimum cell sizes of : 1.5 and 3.0 MHz Sontek SL or 1.0 and 2.0 MHz Nortek EasyQ/EasyV And allows use of up to 128 cells 600 kHz ChannelMaster matches or beats the maximum range and minimum cell sizes of And gives you up to 90 meter range

Why Buy RDI? Versatility 300 kHz ChannelMaster matches or beats the maximum range and minimum cell sizes of: 500 kHz and 1.5 MHz Sontek SL 1.0 and 2.0 MHz Nortek EasyQ/EasyV And gives you up to 300m range!

Range Comparisons

Why Buy RDI? Broadband ADCP Performance Patented technique Single ping standard deviation ~7 times better than Narrowband using same cell size: i.e.: 50 narrowband pings = 1 broadband ping Less time, less energy, needed to reach desired accuracy – save money on solar cells and batteries. Inland applications are often low velocity: narrowband may need to average for minutes to achieve accurate result – this may cause a bias during changing flow conditions

Why Buy RDI? 20 degree beam angle Fundamental assumption of constant flow at any cell range Good in open ocean, less good in rivers Narrower beam angle reduces effects of inhomogeneous flow – unmeasured and uncorrected bias. Most important at far end of range.

Who has them installed? China > 100 Mexico > 120 Great Britain > 25 USA >70 Mexico – specified after 6 month comparison vs Sontek