The PROXIMAG is a very light gradiometer for down hole measurements.
Available in rental.

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 metre vertical separation together with electronics and non-volatile memory for calibration data. The system provides an enhanced depth response, exceptional stability and electronic adjustment.

This magnetic susceptibility system comprises a meter with a wide range of sensors for measuring the magnetic susceptibility of soils and rocks with a resolution to 2 x 10-6 SI units and over a temperature range from -200°C to +900°C. Measurements are non-destructive and low frequency ensures excellent results.

These three-axis magnetic field sensors are compact and extremely effective in providing precise measurements of static and alternating magnetic fields in three axes.