Also known as a fluxgate gradiometer. A remote sensing instrument capable of identifying sub-surface archaeological features by measuring the difference in their magnetic properties against the surrounding soils
an instrument for measuring magnetic fields. Spacecraft often carry fluxgate magnetometers, which measure components of the magnetic field (3 of them are combined to give its strength and direction) but they need to be calibrated. Rubidium-vapor and similar instruments measure only the field strength, but their reading is absolute, related to atomic constants.
Equipment that accurately measures the earth's magnetic field. Variations in the field can be due to different magnetic properties of different rocks. Interpretations can be made of the data recorded to give an indication of the structure of the rock strata.
A device to measure the presence of a magnetic field as well as its strength, direction, and fluctuation. Paranormal researchers use the device in an attempt to detect a ghost' s magnetic or energy aura.
A scientific instrument used to detect disturbances and irregularities in the earth's magnetic field caused by the presence of metal, excavated areas, burned areas, or other disturbances in the soil. This helps archaeologists locate where people have previously lived and worked so they know where to excavate.