2. COMPARISON OF VARIOUS TYPES TypeFunctions CMC Sp Pulse + time + velocity PVD100 Hydromate CMC3 Pulse + time + velocity + discharge

3. CMC Sp PVD100

4. PVD100 / CMC SpPVD100 / CMC Sp Pulse, time and velocity functionality LCD display ‘Cleans’ signal from specific current meters Two fan equations Display instantaneous point velocity (at end of timing period) Internal 3V DC (2*AA alkaline batteries) Same timing intervals as CMC20A

5. HydroMate CMC3 Stream Gauging Computer

6. Pulse, time, velocity and discharge functionality LCD ‘touch screen’ display Internal re-chargeable ‘D’ size batteries (mains and car charger) RS232 communications to laptop Memory for up to 32 fan calibration formulae Memory for up to 30 stream sites (max. 30 verticals, with max. 11 velocity observations on each vertical)

7. HydroMate CMC3 Stream Gauging Computer Measures and displays BOTH instantaneous and average velocity Current meter connected by standard ‘banana’ type plugs Screen display can be rotated 180° Screen display can be set for ‘left’ or ‘right’ handed operators Discharge computation by either ‘Mean’ or Mid’ Section methods Columbus weight offset feature Data output as CSV file to data base