Geometrics G-882 Marine Magnetometer

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    The Geometrics G-882 Marine Magnetometer is used in the detection and mapping of ferrous objects and debris in shallow or deep water. The G-882 delivers high-resolution results in locating anchors, chains, cables, pipelines, shipwreck debris, engines, aircraft and other objects with magnetic expression in pipeline, site clearance and archaeological survey applications. Its lightweight structure and portability enables easy deployment and operation by a single person on small or large vessels.

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    SKU: G-G-882-MM Category:

    The Geometrics G-882 Marine Magnetometer is used in the detection and mapping of ferrous objects and debris in shallow or deep water. The G-882 delivers high-resolution results in locating anchors, chains, cables, pipelines, shipwreck debris, engines, aircraft and other objects with magnetic expression in pipeline, site clearance and archaeological survey applications. Its lightweight structure and portability enables easy deployment and operation by a single person on small or large vessels, without the need for a winch.

    The G-882 has been designed for use in a myriad of environmental conditions for many types of applications, and is useful in operation from a small vessel for shallow water surveys, as well as in deep tow applications (4,000 psi rating) from large survey vessels. The high sensitivity of the G-882 is also suitable for integration with side scan sonar systems and monitoring of fish depth and altitude.

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    • Operating Principle: Self-oscillating split-beam Cesium Vapor (non-radioactive)
    • Operating Range: 20,000 to 100,000 nT
    • Operating Zones: The earth's field vector should be at an angle greater than 6o from the sensor's equator and greater than 6o away from the sensor's long axis. Automatic hemisphere switching.
    • CM-221 Counter Sensitivity: <0.004 nT/ pHz rms. Typically 0.02 nT P-P at a 0.1 second sample rate or 0.002 nT at 1 second sample rate. Up to 40 samples per second
    • Heading Error: <1 nT over entire 360o spin and tumble
    • Absolute Accuracy: <3 nT throughout range
    • Output: RS-232 at 1,200 to 19,200 Baud
      Mechanical
    • Sensor Fish: Body 2.75 in. (7 cm) diameter, 4.5 ft (1.37 m) long with fin assembly (11 in. cross width), 40 lbs. (18 kg) Includes Sensor and Electronics and 1 main weight. Additional collar weights are 14lbs (6.4kg) each, total of 5 capable
    • Tow Cable: Kevlar Reinforced multiconductor tow cable. Breaking strength 3,600 lbs, 0.48 in OD, 200 ft maximum. Weighs 17 lbs (7.7 kg) with terminations.
    • Operating Temperature: -30oF to +122oF (-35oC to +50oC)
    • Storage Temperature: -48oF to +158oF (-45oC to +70oC)
    • Altitude: Up to 30,000 ft (9,000 m)
    • Water Tight: O-Ring sealed for up to 9000 ft (2750 m) depth operation
    • Power: 24 to 32 VDC, 1.0 amp at turn-on and 0.5 amp thereafter
    • Standard Accessories: View201 Utility Software, operation manual and ship kit
    • Optional: Telemetry to 10Km coax, gradiometer (longitudinal or transverse), reusable shipping case
    • MagLog Lite™ Software: Logs, displays and prints Mag and GPS data at 10 Hz sample rate. Automatic anomaly detection and single sheet Windows printer support
      Typical Detection Range for Common Objects
    • Ship 1000 tons: 0.5 to 1 nT at 800 ft (244 m)
    • Anchor 20 tons: 0.8 to 1.25 nT at 400 ft (120 m)
    • Automobile: 1 to 2 nT at 100 ft (30 m)
    • Light Aircraft: 0.5 to 2 nT at 40 ft (12 m)
    • Pipeline (12 inch): 1 to 2 nT at 200 ft (60 m)
    • Pipeline (6 inch): 1 to 2 nT at 100 ft (30 m )
    • 100 kg of iron: 1 to 2 nT at 50 ft (15 m)
    • 100 lbs of iron: 0.5 to 1 nT at 30 ft (9 m)
    • 10 lbs of iron: 0.5 to 1 nT at 20 ft (6 m)
    • 1 lb of iron: 0.5 to 1 nT at 10 ft (3 m)
    • Screwdriver 5 inch: 0.5 to 2 nT at 12 ft (4 m)
    • 1000 lb bomb: 1 to 5 nT at 100 ft (30 m)
    • 500 lb bomb: 0.5 to 5 nT at 50 ft (16 m )
    • Grenade: 0.5 to 2 nT at 10 ft (3 m )
    • 20 mm shell: 0.5 to 2 nT at 5 ft (1.8 m)