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Aquatec Group Ltd AQUAscat 1000LT

Suspended sediment in the field - to 200m Ideal for sediment research and surveys

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 ocea…

  • Aquatec Group Ltd AQUAscat 1000LT
Aquatec Group Ltd
Aquatec House, Stroudley Road
RG24 8FW Basingstoke
United Kingdom

Description

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.

Specifications

  • Sediment Range
    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
  • Frequency
    2 frequencies - 1MHz, 4MHz
  • Transducers
    Typically Ø10-20mm ceramic discs (beam width according to frequency)
  • Transducer arrangement
    2 fixed transducers
  • Gain
    Software controlled transmitter and receiver gain adjustment
  • Range
    150 cm (typical) at 4MHz, 255cm at 1MHz
  • Transmitted signal
    1 W rms typical transmit CW pulse, pulse length to match cell size.
  • Transmission rate
    128 Hz max pulse rate for each frequency (i.e. 256 pulses per second for two), subject to acoustic range limits. Minimum rate 1 Hz for calibration.
  • Data averaging
    Cell ensembles averaged over time by powers of 2 up to 64 before storage
  • Range cells
    256 cells, 10mm standard (at 1500 m/s speed of sound).
  • Burst duration
    Defined by number of profiles requested
  • Burst trigger
    Either external hardware trigger when required or internal software trigger at regular intervals
  • Burst interval
    Internally generated from once every minute to once every 255 minutes, user definable start time of first burst
  • Trigger output
    A digital output allows triggering of external instruments
  • Power requirement
    8 V to 24 V dc. Typically 1 W when logging, and with standby of typically 1 mW when not logging.
  • Battery packs
    Internal rechargeable Nickel Metal Hydride battery pack gives up to 5 days typical burst deployment. External battery packs available according to deployment needs.
  • Disk storage
    Compact Flash (proprietary format), 8 GB standard
  • Additional sensors
    Built-in temperature and pressure, optional turbidity
  • Data comms
    USB 1.1 typically 2-3 Mbaud
  • Housing options
    200m rated acetal housing.

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