AWAC2 400 New
Awac400K Hz 3
Awac400K Hz 4
AWAC2 400 New
Awac400K Hz 3
Awac400K Hz 4



400 kHz

Real-time current profiles and directional waves with up to 100 m range

  • Real-time current profiles and waves to 100 m range
  • Acoustic surface tracking (AST) with vertical beam
  • Can be used both with fixed frames and subsurface buoys


The AWAC 400 kHz ADCP has become the standard reference technology in submerged wave-measurement applications. Thousands of these ADCPs have been deployed to capture the full wave spectrum, in combination with current profiles. With a 100 m maximum range for wave measurements and 1.5 Hz sampling of the surface elevation, the AWAC 400 kHz is the optimal tool for deeper-water current and wave measurements.

The AWAC 2 design offers future-proof electronics, better performance and easier instrument maintenance.

  • Currents
  • Waves


  • Real-time current profiles and waves to 100 m range
  • Acoustic surface tracking (AST) with vertical beam
  • Can be used both with fixed frames and subsurface buoys


  • Online measurements of currents and waves at long ranges
  • Site studies for offshore wind platforms
  • Measurement campaigns where the full wave spectrum is needed
  • Monitoring of transient waves for channel wall protection


Designed for straightforward and reliable current and wave measurements in up to 100m of water, the AWAC 400kHz is configured using the AWAC deployment software before installation. The 400kHz AWAC’s wave measurement range is the longest of the AWAC family.


AWACs are often bottom-mounted and/or implemented as part of real-time wave monitoring systems. Leading industry partners offer bespoke frames and buoys for the AWAC.


Optional onboard wave processing allows real-time streaming of wave parameters to users onshore. Nortek’s SUV processing method (exclusive to AWACs and Signatures) enables quality wave measurements from a moving subsurface buoy. Nortek postprocessing software and/or display software is available for review or visualization of data, after deployment or in real time.

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Maximum profiling range

100 m

Cell size

1.0-8.0 m

Number of cells


Velocity range

±10 m/s horizontal, ±20 m/s upon request


±1% of measured value ±0.5 cm/s

Velocity precision

Consult instrument software

Maximum output rate

1 Hz or 2 Hz

Internal sampling rate

4 Hz


Same as velocity


0.45 dB

Dynamic range

90 dB

Transducer acoustic frequency

400 kHz, 600 kHz for vertical beam

Number of beams

3 beams 120° apart, one vertical beam, (90° apart, one at 5° for platform mount)

Beam width

1.18 (2,36° total)

Beam width vertical beam

1.93° total

Maximum depth

100 m

Data types

Pressure, one velocity along each beam, AST

Sampling rate velocity (output)

2 Hz

No. of samples per burst

512, 1024 or 2048 (Contact Nortek for other burst configurations)


-15 to 15 m

Accuracy/resolution (Hs)

< 1% of measured value / 1 cm

Accuracy/resolution (Dir)

2° / 0.2°

Period range


Cut-off period (Hs)

20 m depth: 0.9 sec, 60 m depth: 1.5 sec, 100 m depth: 2 sec

Cut-off period (dir)

20 m depth: 3.1 sec, 60 m depth: 5.5 sec, 100 m depth: 7.1 sec


Thermistor in head (sampled at meas. rate)

Temp. range

-4 to +40 °C

Temp. accuracy/resolution

0.1 °C/0.01 °C

Temp. time response

2 min


Solid State magnetometer (max 1 Hz sample rate)


2° for tilt < 30°/0.01°


Solid State accelerometer (max 1 Hz sample rate)


0.2° for tilt < 30°/0.01°

Maximum tilt

Full 3D

Up or Down

Automatic detect


Piezoresistive (sampled at meas. rate)


0-100 m (inquire for options)

Accuracy / Precision

0.1% FS / Better than 0.002% of full scale


16 GB, 64 GB or 128 GB (inquire for larger capacity)

Data record

Consult instrument software


Stop when full


±1 min/year

Clock retention in absence of external power

1 year. Rechargeable backup battery


10/100 Mbits Auto MDI-X, TCP/IP, UDP/IP, HTTP protocols, Fixed IP / DHCP client /Auto IP address assignment, UPnP and Nortek proprietary instrument, discovery over Ethernet


Configurable RS-232/RS-422 300-1250000 bps

Recorder download baud rate

20 Mbit/s (Ethernet only) - 1 GB in 6 minutes

Controller interface

ASCII command interface over Telnet and serial


MCBH6F (Ethernet) + MCBH8F (serial and/or battery)


MCBH6F (Ethernet) + Souriau M-series metal connector for online use (10M) + MCBH2F (battery)


Deployment planning, instrument configuration, data retrieval and conversion (for Windows®)

DC input

12-48 V DC

Maximum peak current

1.5 A

Max. average consumption at 1 Hz

8 W at 1 Hz, Ethernet adds 0.75 W

Typical average consumption

15 mW

Sleep consumption

100 μA, power depending on supply voltage

Transmit power per beam

0.3-30 W, adjustable levels

Ping sequence


Operating temperature

-4 to +40 °C

Storage temperature

-20 to +60 °C



EMC approval

IEC/EN 61000-6-2, 61000-6-3

Depth rating

300 m

Standard model

POM with titanium fasteners

Maximum diameter

306 mm

Maximum length

203 mm

Weight in air


Weight in water


Polyurethane jacket, Shore D hardness, 13mm in diameter, max 500m. Inquire for longer cables


540Wh (alkaline) or 1800 W (lithium)

Declaration of conformity

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