Nortek Signature250 250k Hz sideview 5 transducer
Signature250 2
Signature250 3
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Nortek Signature250 250k Hz sideview 5 transducer
Signature250 2
Signature250 3
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Profileur de courant de portée intermédiaire qui inclut mesure de la houle directionnelle et possibilité de ice tracking


The Signature250 ADCP is a medium-range current profiler with a suite of extra features. It has a current profiling range of 200 m, and can measure wave height, period and direction at depths as great as 150 m. The Signature250 ADCP can also measure acoustic ranging to ice. Its compact design and low power consumption make it an ideal tool for long-term deployments in all waters.

  • Currents
  • Waves

Points forts

  • 200 m current profiling range
  • Wave height and direction from 150 m installation depth
  • Acoustic ranging to ice


  • Ice drift and draft measurements
  • Directional wave measurements
  • Mid-depth current profiles
  • Studies of tidal currents
  • Plankton migration studies
  • Upwelling and downwelling studies
  • Large-scale mixing studies
  • Suitable for wave buoys


The Signature Deployment software guides users through setup to ensure even the most detailed concurrent measurement schemes are handled correctly and makes certain all users can fully utilize the capabilities of the Signature250 ADCP.


The Signature250 offers dependable buoy and bottom frame setups from Nortek and leading industry partners tailored for the instrument. Optional AHRS updated at the same rate as sampling improves motion correction during buoy-mounted measurements.


Concurrent measurement plans enable simultaneous measurements of long-range current profiles and ice tracking. Ocean Contour is a powerful postprocessing software created specifically for the AD2CP platform.

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Maximum profiling range

200 m

Cell size

1-8 m

Minimum blanking

0.5 m

Maximum number of cells

200 (average)

Velocity range (along beam)

User-selectable 2.5 or 5.0 m/s

Velocity range (horizontal)

±10 m/s (typical) ±20 m/s (upon request)

Minimum accuracy

1% of measured value ± 0.5 cm/s

Velocity precision

Broadband processing, consult instrument software

Velocity resolution

0.1 cm/s

Max sampling rate

3 Hz (1 Hz at max power)

Velocity range


Cell size


Profiling range


Range velocity limitations





Average and waves/ice




Same as velocity

Resolution/ dynamic range

0.5 dB / 70 dB

Transducer acoustic frequency

250 kHz

Number of beams

5; 4 slanted at 20°, 1 vertical at 500 kHz (optional)

Beam width

2.3° (slanted), 2.2° (vertical)



Number of bins


Transmit pulse length


Transmit pulse


Resolution / dynamic range


AST frequency

500 kHz

AST max distance

170 m

Maximum wave measurement depth

150 m

Height range

-15 to +15 m

Accuracy/resolution (Hs)

< 1% of measured value / 2 cm

Accuracy/resolution (Dir)

2° / 0.1°

Period range

2-50 s

Cut-off period (Hs)

25 m depth; 2 sec, 50 m depth; 2 sec,100 m depth; 2.2 sec, 150 m depth; 2.7 sec

Cut-off period (dir)

Please inquire

Sampling rate (velocity and AST)

1 Hz


Acoustic ranging to ice, speed and direction, echo sounder data


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)

Standard range

0-300 m (inquire for options)


0.1% FS / Better than 0.002% of full scale

Accelerometer dynamic range

± 2 g

Gyro dynamic range

± 250°/sec

Magnetometer dynamic range

± 1.3 Gauss

Pitch and roll range / resolution

± 90° (pitch) ± 180° (roll) /0.01°

Pitch and roll accuracy

± 2° (dynamic)4), ± 0.5° (static, ±30°)

Heading range / resolution

360°, all axis /0.01°

Heading accuracy

± 3° (dynamic)4), ± 2° (static, tilt < 20°)

Sampling rate

Same as measurement rate (up to 3 Hz)


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

Depending on configuration

MCBH6F (Ethernet), MCBH8F (serial), MCBH2F-G2 (pwr), optional Souriau M-series metal connector for online use (10M)


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

DC input

15-48 V DC

Maximum peak current

1.5 A

Max. average consumption at 1 Hz

15 W

Typical average consumption

400 mW

Sleep consumption

100 μA, power depending on supply voltage

Transmit power per beam

4-200 W, adjustable levels

Ping sequence

Multiplexing or parallel


540 Wh alkaline or 1800 Wh lithium


Depending on configuration, consult software

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. Reinforced polyurethane transducer cups

Maximum diameter

464 mm

Maximum length with room for internal batteries

523 mm

Maximum length without room for internal batteries

308 mm

In air, no battery

18.5 kg (17.1 kg short)

In water, no battery

1.5 kg (5.2 kg short)


5.0 kg (540 Wh), 2.9 kg (1800 Wh)

Signature 250 General Arrangement - NGA061-001 Rev.-

Vibrations test of Signature250
Declaration of conformity
Statement of compliance


5-beam head (adds 500 kHz vertical transducer)

4-beam head

Standard, with room for 540 Wh battery

Short, no room for battery

16 GB SD card data logger

64 GB SD card data logger

Pressure sensor, 0-10 m, 0,1%

Pressure sensor, 0-20 m, 0,1%

Pressure sensor, 0-30 m, 0,1%

Pressure sensor, 0-50 m, 0,1%

Pressure sensor, 0-100 m, 0,1%

Pressure sensor, 0-200m, 0,1%

Pressure sensor, 0-500m, 0,1% (Note: instrument depth rating is 300m)

10m Ethernet cable with MCIL6MP, Power/RJ45 at dry end

10-100m Ethernet cable (specify length in comments field) with MCIL6MP-PWR/RJ45

10m Serial RS232 cable, MCIL8MP-DB12

10m Serial RS232 cable, MCIL8MP-DB9 w/RS485 trigger

Serial RS422 cable >10m (specify length in comments field), MCIL8MP-DB9

Online cable, Souriau 10M open ended, (specify length in comments field)

Online cable, Souriau 10M PWR/RJ45, max 100m, (specify length in comments field)

5-beam head (adds 500 kHz vertical transducer)

Compass and tilt sensor


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