Ideal for UAV or ground magnetic base station. Recently serviced by GEM.
We have for sale a used GEM Systems GSM-19 Overhauser gradiometer. It would be ideal for a base station used in tandem with a UAV magnetometer or a roving ground mag system.
Can sample at 3s.
Much more accurate than a proton magnetometer and uses less power.
This unit is actually a gradiometer. Comes with two sensors, but only one sensor cable. Thus there would be redundancy and reliability gains in the field using this gradiometer as a base station.
Does not have a GPS. Comes with poles. Any other spares needed can be purchased from Modern Mag.