Devices & Sensors

Instrument Description

Gravimeter

Gravimeters (or gravity meters) measure the gravity field of the Earth with such a resolution that they can detect very small changes in the underlying or surrounding structures. Their resolution is in the order of 0.01 micro-Gal in a gravity field of 980,000,000 micro-Gal. This resolution enables them to detect minute changes due to fluid motion in the seafloor or magma movements in or below the earth crust, dependent where they are located. The gravimeter of Ocean Networks Canada is placed in gimbals which are carefully balanced so that it will naturally swing into a level position when deployed. The gravimeter is part of a Seafloor Compliance (SFC) apparatus together with a Differential Pressure Gauge (DPG), designed and built by the University of Toronto. The seafloor compliance method can monitor changes in the stiffness of a gas hydrate zone or a magma chamber. The seafloor responds subtly to pressure variations caused by waves. The induced pressure from the waves at the sea surface is detected by the DPG, and the motion of the seafloor, which is dependent on its stiffness, is detected by the high-precision gravimeter.

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
Seafloor Compliance (SFC) Marine Technology Centre

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

3D Camera
Accelerometer
Acoustic Receiver
Acoustic Release
Acoustic Transmitter
Acoustic Transponder
Adapter
ADCP 1 MHz
ADCP 1200 kHz
ADCP 150 kHz
ADCP 2 MHz
ADCP 300 kHz
ADCP 400 kHz
ADCP 55 kHz
ADCP 600 kHz
ADCP 75 kHz
Air Bleeding System
Air Temperature and Humidity Sensor
Altimeter
Anti-Biofouling Device
Automatic Identification Systems (AIS) Data Source
Automatic Identification Systems (AIS) Interface
Automatic Identification Systems (AIS) Receiver
Barometric Pressure Sensor
BARS
Beacon
Benthic Biogeochemical Experiment System
Benthic Chamber
BH Temperature Logger
Biofuel Cell
Borehole Measurements
BPR
Branching Unit
Broadband Seismometer
Cabled Observatory Reciprocal Acoustic Scintillation
Camera Lights
Camera Lights
Camera System
Campbell Scientific Datalogger
CHEMINI
CO2 Sensor
CORK
COVIS
CSEM
CTD
Current Meter
Datalogger
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
Fluorometer CDOM
Fluorometer Crude Oil
Fluorometer FLNTU
Fluorometer Refined Fuels
Gas Tension Device
Gravimeter
Hydrophone
Ice Buoy
Ice Profiler
Imaging Rotary Sonar
In-situ Calibrator
Internal Device Monitor
Junction Box
Magnetometer
Meteorological Station
Methane Sensor
Microbial Incubator
Microbial Sensor
Modem
Moving Vessel Profiler
Multibeam Non-rotating Sonar
Multibeam Rotary Sonar
Navigation
Network Aggregator
Nitrate sensor
Node
Oceanographic Radar System
Orientation
Oxygen Sensor
Pan Tilt Lights
Particle Analyzer
pH Sensor
Piezometer
Plankton Camera System
Plankton Sampler
Platform
Power Supply
Precipitation Gauge
Precise Point Positioning - Float
Precise Point Positioning - Integer
Precise Point Positioning - Orbits
Precision Optical Calibration Module
Pressure Gauge
Profiling Sonar
Profiling Winch
PTP Can
Pump and Valve Control System
Pyranometer
Pyrgeometer
Radiometer
ROV Camera
Sediment Micro-Profiler
Sediment Trap
Server
Short Period Seismometer
Sound Source
Sound Speed Sensor
Still Camera
Sub-bottom Profiler
Suspended Sediment Profiler
Temperature and Depth Logger
Temperature Array
Temperature Sensor
Tempo-Mini Controller
Thermosalinograph
Tiltmeter
Transmissometer
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
Wally
Water Quality Monitor
Water sampler
Wave Buoy
Wind Monitoring System