Aquatec has a long history of innovation and was founded in 1990 by the current managing director as a specialist consultancy in oceanographic design. Since then, the company has established a diverse portfolio of products for the measurement of oceanographic and process parameters, as well as establishing a range of services including instrument and communication design. Suspended sediment measurement has been a core element of our product offering for over 20 years. The AQUAscat range are market leading instruments that use multi-frequency acoustics to observe profiles of suspended sediment concentration up to 10m in range.
Suspended sediment profiler
Sensitive to a wide range of grain sizes Size inversion typically feasible for 20 μm to 500 μm radius Typically 0.01 g/l to 20 g/l over 1 m, or more over shorter range
Up to 4 frequencies, from 500 kHz to 5 MHz
Typically Ø10-25mm ceramic discs (beam width according to frequency), with other optional configurations.
Individual cabled transducers
Software controlled transmitter and receiver gain adjustment
150 cm (typical), up to 10 m at frequencies below 2MHz depending on options.
1 W rms typical transmit CW pulse, pulse length to match cell size.
128 Hz max pulse rate for each frequency (i.e. 512 pulses per second for four), subject to acoustic range limits. Minimum rate 1 Hz for calibration.
Cell ensembles averaged over time by powers of 2 up to 64 before storage
256 cells. 2.5 mm, 5 mm, 10 mm, 20 mm and 40 mm at 1500 m/s speed of sound. Start/end range set by software
Defined by number of profiles requested
Either external hardware trigger when required or internal software trigger at regular intervals
Internally generated from once every minute to once every 255 minutes, user definable start time of first burst
A digital output allows triggering of external instruments
12V power supply
Compact Flash (proprietary format). 2 GB standard.
Cabled turbidity, temperature, pressure
RS232 up to 115 kbaud; USB 1.1 typically 2-3 Mbaud
Plastic IP68 weatherproof instrument case