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Geometrics G-882 Magnetometer

Geometrics G-882 Marine Magnetometer

The Geometrics G-882 Marine Magnetometer is a high-sensitivity cesium vapor magnetometer designed for marine geophysical surveys. It helps survey teams identify magnetic anomalies that may indicate buried or submerged ferrous objects before offshore construction, cable installation, dredging, and other subsea projects begin.

Used for applications ranging from cable route surveys to pipeline location, the G-882 delivers reliable magnetic survey data that helps operators better understand subsea conditions and make more informed project decisions.

Equipment Type: Marine Magnetometer

Benefits of the Geometrics G-882

UXO detection surveys
Cable route surveys
Pre-lay surveys
Pipeline location surveys
Ferrous object detection
Marine archaeological surveys
Études géologiques
Environmental geophysical surveys

Subsea pipelines
Câbles d'alimentation
Telecommunications cables
Offshore wind sites
Marine construction corridors
Shipwreck sites
Ports
Navigation channels

Offshore wind
Oil and gas
Marine construction
Hydrographic surveying
Defense
Marine engineering
Environmental consulting
Research institutions

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Geometrics G-882 Marine Magnetometer for Marine Geophysical Surveys

Successful offshore projects begin with a clear understanding of what lies beneath the seafloor. Buried pipelines, abandoned cables, unexploded ordnance (UXO), anchors, and other ferrous objects can create safety risks, complicate installation work, or lead to costly delays if they aren’t identified before construction begins.

The Geometrics G-882 Marine Magnetometer helps address that challenge by measuring subtle magnetic anomalies that may indicate the presence of buried or submerged ferrous objects. Rather than replacing other marine survey technologies, it complements them by providing another source of information that helps survey teams evaluate potential hazards and investigate anomalies before offshore work begins.

Detect Magnetic Anomalies With High-Sensitivity Cesium Vapor Technology

The Geometrics G-882 uses a self-oscillating split-beam cesium vapor sensor to measure extremely small variations in the Earth’s magnetic field. These variations, known as magnetic anomalies, can indicate the presence of buried or submerged ferrous objects that may not be visible through sonar or visual inspection alone.

High sensitivity, low sensor noise, and sampling rates of up to 20 Hz allow the G-882 to collect dense magnetic datasets throughout a survey. The result is consistent, high-quality magnetic measurements that support accurate anomaly interpretation across both shallow- and deep-water operations.

Support Offshore Projects With Reliable Magnetic Survey Data

Magnetic survey data is most valuable when it helps guide project decisions. Before cables are installed, pipelines are laid, or offshore construction begins, operators need a better understanding of potential hazards and existing infrastructure along the planned work corridor.

Complementing technologies like side-scan sonar, the Geometrics G-882 system helps survey teams develop a more complete understanding of subsea conditions before work begins.

Fit the Geometrics G-882 Into Existing Marine Survey Workflows

A marine magnetometer is most effective when it’s integrated into a broader survey program. The G-882 is designed for deployment from a variety of survey vessels, and can be incorporated into both standalone magnetic surveys and larger multi-sensor campaigns.

Operators can synchronize multiple G-882 systems for expanded survey coverage or configure the system as a gradiometer when additional magnetic data is required. Compatibility with Geometrics’ acquisition and processing software further streamlines data collection and interpretation, helping survey teams move efficiently from field acquisition to final analysis.

Geometrics G-882 Technical Specifications

Type de capteur	Self-oscillating split-beam cesium vapor magnetometer
Operating Range	20,000–100,000 nT
Sample Rate	Up to 20 Hz
Sensor Noise	<0.004 nT/√Hz RMS
Gradient Tolerance	Up to 10,000 nT/m

Towfish Length	137 cm (54 in)
Towfish Diameter	7 cm (2.75 in)
Towfish Weight	18 kg (40 lb)
Standard Tow Cable	800 m (2,625 ft)
Tow Cable Break Strength	1,630 kg (3,600 lb)

Maximum Operating Depth	2,730 m (4,000 psi)
Température de fonctionnement	-35°C to 50°C
Température de stockage	-45°C to 70°C

Data Output	RS-232
Included Software	MagLogLite
Logiciel en option	MagLog Pro, MagMap, MagPick
Multi-Sensor Support	Synchronized multi-sensor configurations
Survey Integration	Compatible with marine geophysical survey workflows