Ice Profiler
Wave Profiler
Water Column Profiler
IRIS- Imagenex Datalogger
ASFM - Open Channel
Acoustic Scintillation Flow Meter
Bottom Frames
WERA HF Radar
Shallow Water Ice Profiler

Key Projects

Surface Buoy Mounted Configuration

The ASL Water Column Profiler offers a new, inexpensive way of obtaining reliable measures of marine environmental conditions in the water column. The Water Column Profiler can monitor the presence and location of zooplankton within the water column by measuring acoustic backscatter returns with ultrasonic frequencies. Other sonar targets realizable from the sonar backscatter data include fish and sediments.

Using onboard data storage, the Water Column Profiler can collect data continuously for periods of up to several months and can be operated in a upward looking orientation from the sea-bed or a subsurface mooring or in a downward looking mode from a surface buoy.

Specifications

UPWARD LOOKING SONAR:

• Operating Frequency: 200kHz*
• Beam Width: 6 deg.
• Burst Sampling Interval: 1 second -1 hour
• Pings per Burst: 1-255
• Ping Rate: up to 1Hz
• Bin size to average samples to: 0.25-4m
• Range: up to 400m*

TILT SENSOR (for sonar beam angle):

• Range: +/- 20 deg.
• Accuracy: +/- 0.5 deg.
• Precision: 0.01 deg.

DATA STORAGE:

• Standard: 64mb of flash E-PROM memory.
• Optional: 128mb for longer deployment/higher sampling rates.

Internal Recording Version Subsurface Moored

POWER:

• Standard: Provides 20 weeks operation at 1Hz sampling and 100% duty cycle.
• Option A: Provides 40 weeks operation at 1Hz sampling and 100% duty cycle.
• Option B: Provides 4 weeks operation at 1Hz sampling and 100% duty cycle.

SIZE:

• 0.17M diameter x 0.6m length

SHIPPING WEIGHT:

• 37kg (in ruggedized aluminium shipping/storage case)

* A range of optional frequencies are available:

125 kHz

200 kHz

460 kHz

Other frequencies available on a custom basis.

Example

See below, data collected over 9 days showing diurnal migration of zooplankton during the deployment of the instrument on a test buoy in Saanich Inlet, BC, Canada.

Brochure

For further information on; Applications, Features, Specifications and Options . . . view and print our brochure (104 kb ~ PDF file format ~ 2 pages)