G-882 Marine Magnetometer

The model G-882 cesium-vapor marine magnetometer provides the same high performance as our airborne instruments delivering high resolution results in all types of survey applications. The G-882 is a low cost, compact system designed for professional surveys in shallow or deep water.

The G-882 magnetometer’s digital output can be recorded with any serial data logger but its full potential is obtained when used with our MagLog Lite™ software to log, display and print GPS positioned measurement results. The price, performance, and reliability of the G–882 make it the best value of any marine magnetometer available today.

The standard G-882 tow cable includes a Vectran strength member and can be built to up to 700m (no telemetry required). The shipboard end of the tow cable is attached to an included junction box or optional on-board cable for quick and simple hookup to power. Output data can be recorded on any Windows 98, ME, NT, 2000 or XP computer equipped with RS-232 serial ports. Best of all, the rugged G-882 is designed for an has been used successfully everywhere in the world for all types of applications.

Pearl Harbor

Watch Ross Johnson, VP of Magnetometer Division, review the mag survey recently completed at Pearl Harbor using our G-882 TVG.

The following YouTube clip has some footage of the G-882 and a good introductory treatment of marine surveying for shipwrecks.

Typical Detection Range For Common Objects

The design of this high sensitivity G-882 marine unit is directed toward the largest number of user needs. It is intended to meet all marine requirements such as shalllow survey, deep tow through long cables, integration with Side Scan Sonar systems and monitoring of fish depth and altitude.

Optional sonar altimeter provides integrated measurement of tow fish’s height above seabed when closer than 100 meters.
A 2700m (9000') depth rating lets you use one mag for all surveys
Easy portability and handling - no winch required- single man operation, 44 lbs with 200 ft cable (without weights or depressor wing), new carrying handle
Combine as many as 6 systems for increased coverage – the internal CM-221 Mini-Counter allows multi-sensor data concatenation. Multi-sensor systems allow dense coverage that maximizes detection of small targets.
Two Year Warranty

Specifications

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 10 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