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Systems and Sensors

Standard Sensors

Vehicle Sensors

  • Pressure: Paroscientific 8B7000-I, Digiquartz depth sensor, rated to 7,000 m. (23,000 ft)
  • Doppler Velocity Logger (DVL): RDI, 300kHz or 1200 kHz
  • Attitude sensors (pitch, roll, heading-internal)
  • PHINS inertial navigation (internal)

Geophysical Sensors

  • Multibeam mapping sonar: Reson 7125, 400 kHz, 512 beams, 50-200m track spacing
  • Edgetech 4 kHz to 20 kHz = 4-24 kHz chirp subbottom profiler
  • Three high precision, digital, APS 3-axis fluxgate magnetometers; 2 mounted midships (port, starboard) in a horizontal gradient mode and a 3rd mounted centrally within the vehicle above the other two in a vertical gradient mode.

Oceanographic Sensors

  • CTD sensor: Seabird 49
  • Optical Backscatter (OBS): Seapoint Turbidity Meter
  • Seafloor photography: Prosilica GC-1380C Digital Still Camera (1Kx1K, 12 bit color still camera with strobe, rated to 6,000 meters)
  • Oxygen Sensor: Aandara Optode
  • NOAA ORP (oxidation-reduction potential) sensor

Scientific Equipment Interfaces

Digital: RS232 standard ports available (300 through 115,200 Baud)
Power: 12, 24 and 48 VDC switched circuits available, custom voltages upon request
Data: Instruments can be synced to precision clock (e.g. all the main computer stack, imaging stack, multibeam, sidescan, PHINS gyro are synced)

** Potentially able to accommodate other digital/power formats and/or quantities.

All science gear connections must be worked out during the pre-cruise process.

Project-specific sensors interfaced to Sentry by PIs during previous cruises

  • Eh electrode (redox sensor) – Dr. Koichi Nakamura, Japan
  • TETHYS (in situ mass spectrometer) - Dr. Rich Camilli, WHOI, USA
  • SUPR Biological Sampler – Dr. Chip Breier, WHOI, USA
  • SyPRID Sampler, Large volume, high-resolution, autonomous, deep ocean precision Plankton Sampler