Signature 250

Intermediate current profiling range that includes wave height/direction and ice tracking capability

Technical specification (PDF)

Highlights

  • 200 m current profiling range
  • Wave height and direction from 150 m installation depth
  • Ice thickness and ice tracking

Overview

  • 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 ice thickness, as well as the speed and direction of drifting ice. Its compact design and low power consumption make it an ideal tool for long-term deployments in all waters.

Applications

  • 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

Water velocity measurements

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
Minimum accuracy                                    1% of measured value ± 0.5 cm/s
Velocity precision                                       Broadband processing, consult instrument software
Velocity resolution                                     0.1 cm/s

Sensors
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                                            0-300 m (inquire for options)
Accuracy/precision                                     0.1% FS / Better than 0.002% of full scale

  • Water velocity measurements

    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
    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)

  • Sensors

    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 0-300 m (inquire for options)
    Accuracy/precision 0.1% FS / Better than 0.002% of full scale

  • Data recording

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