Envco – Environmental Equipment

Reversing flow?
Rapid changes?
Tidal influence?
Pumping?
Backwater?
Under ice?

Small, portable and easy to use, the Argonaut-SW is your friend for all these challenging shallow-water conditions. The SW operates in depths from 0.2 to 5.0 meters (0.7 to 16 ft) and automatically adjusts its velocity cell with changing water level while also reporting a velocity profile for subsequent analysis. Just provide power, and the SW can either output data in real time or record data internally for periodic downloads.

Monitoring flow in natural streams, concrete lined channels and pipes has never been easier than with the Argonaut-SW. This lightweight and compact system uses SonTek’s proven Doppler technology to measure flow, velocity and water level. The system is designed to account for velocity variations within the channel to produce the most accurate flow calculation possible.

Standard Features
• 2-D velocity measurement (using 2 acoustic beams) - along channel and vertical velocity components
• Water level measurement using vertical acoustic beam
• Multi-cell current profiling
• Automatically adjusts sampling volume location to measure the maximum possible portion of the water column
• RS232/SDI-12 communication protocol
• Real-time flow calculations using user-supplied channel geometry
• ViewArgonaut Windows software for instrument setup, data collection, and post processing
• PDA software (SonUtils and deployment module)
• Polycarbonate mounting plate
• Internal 4 MB Recorder
• 3-MHz acoustic frequency
• Temperature sensor

Argonaut Shallow Water Specifications
Velocity Profiling Range
Maximum Depth 5.0 m (16 ft)
Minimum Depth 0.3 m (1 ft) [0.2m (0.7ft) with performance limitations]
Water Level Measurement
Minimum Depth Above Transducer 0.10 m (0.3 ft)
Minimum Total Water Depth 0.20 m (0.6 ft)
Maximum Depth 5.0 m (16 ft)
Accuracy ±0.1% of measured level, ±0.3 m (0.01 ft)

Water Velocity
Range ±5 m/s (16 ft/s)
Resolution 0.1 cm/s (0.003 ft/s)
Accuracy ±1% of measured velocity, ±0.5 cm/s (0.015ft/s)
Power Requirements
Input Power 7-15 VDC
Power Consumption 500 mW - 700 mW nominal
Physical Parameters
Dimensions (L x W x H) 24.5cm x 10.0cm x 6.3cm | (9.7in x 4.0in x 2.5in)
Weight in Air 1.2 kg (2.6 lb)
Weight in Water 0.15 kg (0.3 lb)
Pressure Rating 25 m (80 ft)
Operating Temperature -5°C to 60°C (23°F to 140°F)
Storage Temperature -10°C to 70°C (14°F to 158°F)

Optional Features
• Real-time Flow Display
• Analog output module (4-20mA or 0-5V)
• Modbus Interface Module (MIM)
• RS422 output for cable lengths to 1500m
• Canal/waterway sidewall and bottom mount
• Mounting shoe
• YSI EcoNet satellite or radio telemetry

Ordering Information
9000-01055 Argonaut-SW 3.0 MHz System
Real-time, up-looking, 2D acoustic Doppler current meter with programmable range selection (including Dynamic Boundary Adjustment), vertical acoustic beam for water-level measurement, multi-cell (10) current profiling, internal flow calculations, integrated temperature sensor, RS232/SDI-12 interface, and 4MB data storage in a low-profile (6.5cm) acetal pressure case (25m max, depth) with mounting plate. Windows-based software includes: ViewArgonaut (for data acquisition, analysis, and flow calculations); SonUtils (utility software for PCs and PDAs). Includes tool kit, power supply, and manual (PDF) on CD.
8012-00021 10-m power and RS232/SDI-12 communications cable
8012-00041 20-m power and RS232/SDI-12 communications cable
Useful options and accessories
Real-time Flow Display
Provides an easy-to-use interface for monitoring both output data and the system status.

Mounting Shoe
Fits like a glove and easy to install. Intended for use in open channels, culverts and pipes.

Modbus Interface Module
Integrate into any Modbus-enabled system using Modbus RS-232 protocol.