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Very high resolution Caesium Vapour performance has been incorporated onto a rugged, tow fish, system for professional surveys in deep water. High sensitivity at fast sample rates of total field measurements are maintained for all applications.

Features include:

  • Deep Water rating

  • Transverse and Longitudinal Gradiometer options, can be combined with many modern digital side scan sonar systems

  • High Sensitivity 0.004nT/root Hz

  • Digital output, can be logged with MagLog™  software.

  • Rugged design

  • 6000 metre tow cable option, using standard side scan sonar tow cable

  • No phase lag on data

  • True amplitudes reported

  • Can easily be combined into gradiometer arrays with concatenated data stream
 
Geometrics G-880 Marine Caesium Vapour Magnetometer
 
 

 

 

 

 

 

Specifications

Measured Quantity  Total Magnetic field in nT typical sensitivity 0.01nT at 1sec sample interval
Operating Principle  Self Oscillating split beam Optically pumped Caesium Vapor cell (non-radioactive)
Heading Error  < +/- 0.5nT over entire 360° range
Absolute Accuracy  ±2nT throughout range
Output  RS232 @ 9600 baud (other output rates on request)
Power Supply  24 to 32 VDC
Operating Temperature -35° to + 50° C
Operating Range   20,000nT to 100,000nT
Pressure Rating  2000 psi (approx 1300 metres)
Operating Zones The earth's field vector should be at an angle of greater than 6° away from the sensor's equator and greater than 6° away from the sensor's long axis. Automatic hemisphere switching
Options: Deep pressure rating, altimeter, longitudinal gradiometer, long (6000m) tow cable option
Dimensions Instrument: body 7cm dia  x 175 cm
Weight Instrument: 12.3kg
Cable: 3.85 kg/30m

For actual test results of Caesium Vapour sensors heading error click here, for actual test results on Caesium Vapour sensors noise level and bandwidth click here.

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