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