Bartington Instruments Grad 601 Fluxgate Magnetic Gradiometers

Grad601 Single & Dual Sensor Magnetic Gradiometers

The Grad601 is a vertical component fluxgate gradiometer with data logger and either one or two cylindrical sensor assemblies for use in geophysics and archaeology. Each sensor assembly contains two fluxgate magnetometers with a one meter vertical separation together with electronics and non-volatile memory for calibration data. The system provides an enhanced depth response, exceptional stability and electronic adjustment.

The Grad601-1 single sensor version is ideal for both archaeological prospecting and the location of pipes, cables, drums and archaeological features.

The Grad601-2 two-sensor version is designed for archaeological prospecting and allows geophysical surveys to be completed in about half the time. The large non-volatile flash memory and fast downloading of data offer improved survey efficiency.

These gradiometers have a linear range of 100nT with a resolution of 0.1nT and a range of 1000nT with a resolution of 1nT. A compressed response is provided to 30,000nT.

The exceptional temperature stability of the sensors ensures minimal drift during surveys and reduces the need for adjustment. All adjustments are accomplished automatically using a single pushbutton and audible cueing.

The Grad601-1 and Grad601-2 gradiometers are supplied complete with cables and accessories in a rugged carrying case. The Grad601-2 dual gradiometer includes an adjustable harness which completely relieves the operator's arms whilst carrying the instrument.

Features

1m vertical spacing for deep anomalies
1 or 2 sensor operation
High stability and simple electronic adjustment
Selectable 0.1nT or 1nT resolution
Non-volatile flash memory for 125k readings
1, 2 or 4 lines/m for single or dual version
1 to 8 readings/m on each line with automatic averaging or single shot
Low power - 24 hour operation from one charge
Survey and Scan modes with audio output
Battery unit has built-in charger and field replaceable battery
Battery fuel gauge
Variable survey pace
Variable scan threshold
Simple download operation - 6.5 mins max
Selectable output format
Simple 6-key operation
50/60Hz powerline rejection

The gradiometer operates either in survey mode, where data is logged whilst covering the site in parallel or zigzag paths, or in a scanning mode where it is used as a search tool with an audible output without data logging. The scanning mode is used to locate archaeological features, pipes, cables, waste drums and unexploded ordnance.

Grad601 Data sheet

Grad601-2 Dual Gradiometer

Grad601-2 Dual in use
Grad601-2 Dual Gradiometer in use

Grad601-1 Single Gradiometer

Grad601-1 Single Gradiometer in use


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Grad601 Single & Dual Sensor Magnetic Gradiometers

Please contact John Toth at ASC Scientific for current prices.