Innovation in Magnetic Field Measuring Instruments

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Grad601 Single Axis Gradiometer Systems

Grad601-2 Dual Sensor Fluxgate GradiometerGrad601-2 Dual Sensor Fluxgate Gradiometer in use in SudanGrad601-1 Single Sensor Fluxgate Gradiometer

Photograph courtesy of British School at Rome

 

The Grad601 is a high-resolution fluxgate gradiometer, used for measuring minute variations in the magnetic field that are caused by hidden anomalies in the ground, such as archaeological features, pipes, cables or unexploded ordnance (UXO).The full system includes a data logger, a battery cassette, and either one or two Grad-01-1000L sensors mounted on a rigid carrying bar. Calibration is easy following an automated procedure.

The data logger’s non-volatile flash memory will hold surveyed grids. These can be downloaded as individual files, so different-size grids may be recorded during a survey. For GPS-based surveys, a cart system can be supplied for mounting of Grad-01-1000L sensors. Further details can be found on the Non-Magnetic Cart page. Existing Grad601 users can easily adapt their existing equipment to the Cart system reducing the cost of update.

Suitable data processing software (Terrasurveyor) is also available for a complete solution.

Typical applications:

• Archaeological Geophysics

• Forensics

• UXO detection

• Pipe and cable location

Features:

• Electronic adjustment

• Selectable resolution 0.01nT or 0.1nT (Grid mode); 0.1nT (NMEA mode)

• 50Hz or 60Hz filter for mains rejection

• Easy upgrade to Cart based surveys


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