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Gravity Meter- INO Sea-Floor

The INO sea-floor gravity meter uses the well proven CG-5 Autograv™ fused quartz sensor in a submersible system. The INO is easy to operate, self-contained and comes in a standard model for 600m depths.


The INO has a standard resolution of 1 microGal with a standard deviation that is < 5 microGals.

Easy to Operate
With minimal training a user can quickly collect and record reliable gravity data. The INO connects to a standard 7- conductor marine winch cable for easy deployment.

Rugged, Robust Sensor, No Clamping Required
The sensing element of the INO is based on the CG-5 Autograv fused quartz spring system. The gravitational force on the proof-mass is balanced by a spring and an electrostatic restoring force. The inherent strength and excellent elastic properties of fused quartz, together with the limit stops around the proof-mass, permit the instrument to be operated without clamping. Additional protection is provided by a durable shock mount system.

Freedom from Tares
Due to low mass and excellent elastic properties of fused quartz, tares are virtually unknown. The INO system is mounted on shock absorbers to minimize the impact of landing on the sea-floor.

Automatic Compensation and Correction
By using electronic tilt sensors, the INO is constantly updating information from the internal tilt sensors. The INO can automatically compensate measurements for the errors in instrument tilt as it settles onto the sea-floor. Based on operator entered geographical location and time zone data or GPS information, the INO can automatically calculate and apply a real time tidal correction to each reading.

Automatic Noise Rejection
Measurement errors due to vibrations are limited by smart signal processing and unsurpassed seismic noise rejection. The INO has a very effective seismic filter that can remove micro-seismic noise.

Low Residual Drift
The extremely stable operating environment of the quartz spring system allows the long-term drift to be accurately determined and a real-time software correction reduces it to less than 0.02 mGal/day


Oil & Gas Exploration
Gravity can be used to determine the location of a Salt dome in 
which oil or gas could be present. Measuring the density change in 
an oil reservoir can assist in the oil and gas recovery process.

Mineral Exploration
Gravity can detect Sea-floor Massive Sulphides.

Geological Mapping
Gravity can be used to complement the results of geological 
mapping of the sea-floor.

Gravity can be used to determine mass of investigation.

 INO Sea-Floor Gravity Meter
INO Sea-Floor Gravity Meter
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