Nortek Signature 100k Hz frontview
Nortek Signature 100k Hz sideview
MG 2288
ABS2 lowres
Nortek Signature 100k Hz frontview
Nortek Signature 100k Hz sideview
MG 2288
ABS2 lowres

Ocean currents


Long-range current profiler designed for combined current profile and biomass measurements


The Signature100 combines a four-beam current profiler operating at 100 kHz with an optional scientific echosounder.

Both the current profiler and the biomass measurements have an effective range of 300-400 m providing unprecedented insight into the dynamics of zooplankton, krill or even schools of fish. Likewise, acoustic tracer material can give new insight into small-scale physical processes.

  • Currents
  • Waves
  • Echosounder


  • 300–400 m current profiling range
  • Optional center beam with 70–120 kHz echosounder


  • Detection of krill in the water column
  • Cost-effective current profile measurements at mid-range
  • Plankton migration studies
  • Upwelling and downwelling studies
  • Internal waves
  • Suitable for buoy mounting with internal AHRS


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 Signature ADCP.


The Signature100 offers dependable buoy and bottom frame solutions from Nortek and leading industry partners tailored for the instrument. Optional AHRS improves motion correction during buoy-mounted long-range current profiles.


The combined scientific echosounder option enables users to collect concurrent velocity profiles and high-resolution echosounder data from a single instrument. Ocean Contour is a powerful postprocessing software created specifically for the AD2CP platform, and for expert-level biomass processing our industry partners at Echoview can be consulted.

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Maximum profiling range 300-400 m*
Cell size 3–15 m
Minimum blanking TBA
Maximum number of cells 200
Velocity range (along beam) User-selectable 2.5 or 5.0 m/s
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 1 Hz (1/2 Hz at max output power)
*Maximum range depends on acoustic scattering conditions.

Velocity range N/A
Cell size N/A
Profiling range N/A
Range velocity limitations N/A

Single Average
Concurrent Average and echosounder
Alternate N/A
* US Patent 8223588

Sampling Same as velocity
Resolution/dynamic range 0.5 dB/70 dB
Transducer acoustic frequency 100 kHz
Number of beams 4 slanted at 20°, optional vertical beam for echosounder
Beam width 6.1° (slanted)

Transducer acoustic frequency 70–120 kHz
Transducer beam width 15° @ 70 kHz, 8.7° @ 120 kHz
Resolution 0.375–4 m
Number of bins 1800
Transmit pulse length 0.5–6 ms
Transmit pulse Monochromatic 70 kHz, 90 kHz and 120 kHz or frequency chirp (90 kHz, 50% BW)
Transmit power 1.2–120 W, adjustable
Chirp signal processing Pulse compression or binned frequency response
Raw complex data storage Configurable rate
Resolution/dynamic range 0.01 dB / 130 dB
Linearity TBA

AST frequency N/A
AST max distance N/A
Maximum wave measurement depth N/A
Height range N/A
Accuracy/resolution (Hs) N/A
Accuracy/resolution (Dir) N/A
Period range N/A
Cut-off period (Hs) N/A
Cut-off period (dir) N/A
Sampling rate (velocity and AST) N/A

Parameters N/A

Temperature 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
Compass Solid-state magnetometer (Max 1 Hz sample rate)
Accuracy/resolution 2° for tilt < 30°/0.01°
Tilt Solid-state accelerometer (Max 1 Hz sample rate)
Accuracy/resolution 0.2° for tilt < 30°/0.01°
Maximum tilt Full 3D
Up or down Automatic detect
Pressure Piezoresistive (sampled at meas. rate)
Standard range 0–1500 m (inquire for options)
Accuracy/precision 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)*, ± 0.5° (static, ±30°)
Heading range/resolution 360°, all axis / 0.01°
Heading accuracy ± 3° (dynamic)2), ± 2° (static, tilt < 20°)
Sampling rate Same as measurement rate (up to 1 Hz)
* Dynamic specifications depends on the type of motion

Capacity 16 GB, 64 GB or 128 GB (inquire for larger capacity)
Data record Consult instrument software
Mode Stop when full

Accuracy ± 1 min/year
Clock retention in absence of external power 1 year. Rechargeable backup battery

Ethernet 10/100 Mbits Auto MDI-XTCP/IP, UDP, HTTP protocolsFixed IP/DHCP client/AutoIP, UPnP
Serial 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 (14M)

Functions 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* 2 W
Sleep consumption 100 μA, power depending on supply voltage
Transmit power per beam 4–200 W, adjustable levels
Ping sequence Multiplexing or parallel
* 10 min. avg. profile,1 cm/sec hor. prec., max cell size, max power, long range mode. Consult SW for other configurations

Internal One or two 540 Wh alkaline or 1800 Wh lithium
Duration Depending on configuration, consult software

Operating temperature -4 to +40 °C
Storage temperature -20 to +60 °C
Vibration IEC60068-2-64
EMC approval IEC/EN 61000-6-2, 61000-6-3
Depth rating 1500 m (for 6000 m version, contact Nortek for specifications)

Standard model POM with titanium fasteners. Titanium/POM transducer cups

Maximum diameter 460 mm
Maximum length with room for internal batteries 765 mm (2 batteries)
Maximum length without room for internal batteries N/A

In air, no battery 37.5 kg
In water, no battery 13 kg
Battery 10.0 kg (2x540 Wh), 5.8 kg (2x1800 Wh)

Signature 100 General Assembly - NGA061-007 Rev.-A

Declaration of conformity


4-beam head

5-beam head (adds 95 kHz center transducer for echo sounder)

Long (for two internal batteries)

Medium (for one internal battery)

Short (no internal battery)

16 GB SD card data logger

64 GB SD card data logger

128 GB SD card data logger

Pressure sensor, 0-1500 m, accuracy 0,1% of FS

Pressure sensor, 0-100 m, accuracy 0,1% of FS

Pressure sensor, 0-1000 m, accuracy 0,1% of FS

10m Ethernet cable with MCIL6MP, Power/RJ45

10-100m Ethernet cable (specify length in comments field) with MCIL6M-PWR/RJ45

10m Serial RS232 cable, MCIL8M-DB9

10m Serial RS232 cable, MCIL8M-DB9 w/RS485 trigger

Serial RS422 cable >10m (specify length in comments field), MCIL8M-DB9

Online cable, Souriau 14M open ended, (specify length in comments field)

Online cable, Souriau 14M PWR/RJ45, max 100m, (specify length in comments field)

Online cable for RS-422 interface box, Souriau 14M (specify length in comments field)


Compass and tilt

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