Devices & Sensors

Instrument Description

Oxygen Sensor

Oxygen sensors measure dissolved oxygen concentration in seawater.

Aanderaa Optodes determine the in-situ oxygen concentration using a platinum porphyrine sensing foil that acts as a dynamic fluorescence quencher. The optode's sensing foil is excited by exposing it to a modulated blue-green light source, and due to its fluorescent behaviour, it returns red light. The lower wavelength photon that is emitted is delayed by the presence of oxygen molecules, and the amount of oxygen is determined by the phase shift between excitation of the foil and detection of the returned red light. By linearizing and temperature compensating this phase shift, the absolute oxygen concentration can be determined.

Seabird 43 oxygen sensors uses a Clark polarographic membrane. Oxygen molecules diffuse through a membrane and are converted to hydroxyl ions at a gold cathode. The rate of diffusion of oxygen molecules leads to a measurable electrical current from which oxygen concentration can be calculated.

Sea-bird 63 Oxygen Sensors are designed to be integrated with Sea-bird CTDs. The elapsed time between the CTD and associated oxygen measurement is easily quantified, and corrected in post-processing.

Alec RINKO oxygen sensors are a fast-response, high accuracy and high-resolution sensor based on an optical phosphorescence.

Specific Instruments

Individual instruments of the above category, which are (or have been) connected to our observatories. Click an instrument for detailed information.

Name/Model/ID Current Location
Aanderaa Optode 3830 (S/N 871) Expedition - On ROV
Aanderaa Optode 3830 (S/N 910) Marine Technology Centre
Aanderaa Optode 3830 (S/N 911) Marine Technology Centre
Aanderaa Optode 3835 (S/N 1415) Marine Technology Centre
Aanderaa Optode 3835 (S/N 1416) Marine Technology Centre
Aanderaa Optode 3835 (S/N 1417) British Columbia Ferries
Aanderaa Optode 3835 (S/N 1797) Marine Technology Centre
Aanderaa Optode 3835 (S/N 224) Ocean Networks Canada Offices
Aanderaa Optode 3835 (S/N 418) British Columbia Ferries
Aanderaa Optode 4175 (S/N 0580) Marine Technology Centre
Aanderaa Optode 4175 (S/N 0581) Marine Technology Centre
Aanderaa Optode 4175 (S/N 1684) Marine Technology Centre
Aanderaa Optode 4175 (S/N 18) Marine Technology Centre
Aanderaa Optode 4175 (S/N 579) Marine Technology Centre
Aanderaa Optode 4175C (S/N 0793) Marine Technology Centre


Click the instrument categories below for descriptions and lists of instruments belonging to that category.

3D Camera
Acoustic Doppler Current Profiler 1 MHz
Acoustic Doppler Current Profiler 1200 kHz
Acoustic Doppler Current Profiler 150 kHz
Acoustic Doppler Current Profiler 2 MHz
Acoustic Doppler Current Profiler 300 kHz
Acoustic Doppler Current Profiler 400 kHz
Acoustic Doppler Current Profiler 55 kHz
Acoustic Doppler Current Profiler 600 kHz
Acoustic Doppler Current Profiler 75 kHz
Acoustic Receiver
Acoustic Release
Acoustic Transmitter
Acoustic Transponder
Air Bleeding System
Air Temperature and Humidity Sensor
Anti-Biofouling Device
Automatic Identification Systems Data Source
Automatic Identification Systems Interface
Automatic Identification Systems Receiver
Barometric Pressure Sensor
Benthic and Resistivity Sensors
Benthic Biogeochemical Experiment System
Benthic Chamber
Benthic Crawler
Biofuel Cell
Bioluminescence Spectrometer
Borehole Measurements
Borehole Temperature Logger
Bottom Pressure Recorder
Branching Unit
Broadband Seismometer
Cabled Observatory Reciprocal Acoustic Scintillation
Cabled Observatory Vent Imaging Sonar
Camera Lights
Camera System
Campbell Scientific Datalogger
Carbon Dioxide Sensor
Chemical Miniaturized Analyzer
Circulation Obviation Retrofit Kit
Coloured Dissolved Organic Matter
Conductivity Temperature Depth
Controlled Source Electromagnetic Method
Current Meter
Differential Pressure Gauge
Digital Optical Module
Dive Computer
Drifter Buoy
Earthquake Early Warning System Aggregator
Echosounder, Bioacoustic
Echosounder, Hydrographic Multibeam
Echosounder, Hydrographic Single Beam
Flow meter
Fluorometer Crude Oil
Fluorometer Refined Fuels
Fluorometer Turbidity
Gas Tension Device
Global Navigation Satellite System Receiver
Ice Buoy
Ice Profiler
Imaging Rotary Sonar
In-situ Calibrator
Internal Device Monitor
Junction Box
Meteorological Station
Methane Sensor
Microbial Incubator
Microbial Sensor
Moving Vessel Profiler
Multibeam Non-rotating Sonar
Multibeam Rotary Sonar
Muon Tracker
Network Aggregator
Nitrate sensor
Oceanographic Radar System
Oxygen Sensor
Pan Tilt Lights
Particle Analyzer
pH Sensor
Plankton Camera System
Plankton Sampler
Power Supply
Precipitation Gauge
Precise Point Positioning - Float
Precise Point Positioning - Integer
Precise Point Positioning - Orbits
Precise Time Protocol Device
Precision Optical Calibration Module
Pressure Gauge
Profiling Sonar
Profiling Winch
Pump and Valve Control System
Remotely Operated Vehicle Camera
Sediment Micro-Profiler
Sediment Trap
Short Period Seismometer
Side-scan Sonar
Sound Source
Sound Speed Sensor
Standard Module
Still Camera
Sub-bottom Profiler
Suspended Sediment Profiler
Temperature and Depth Logger
Temperature Array
Temperature Sensor
Tempo-Mini Controller
Turbidity Meter
Turbidity, Chlorophyll and Fluorescence
Underwater Cavity Ring-down Spectroscopy
Underwater Ultraviolet Raman Spectrometer
Underwater Voltammetric System
Vertical Profiler Instrument Package
Vertical Profiler System Base
Video Camera
Video Server
Water Quality Monitor
Water sampler
Wave Buoy
Wavelength Shifting Optical Module
Wind Monitoring System