Magnetometers are distinct from metal detectors, which detect metallic objects by detecting their conductivity.

Magnetometers can detect only magnetic ( ferrous ) metals, but can detect such metals at a much larger depth than a metal detector ; magnetometers are capable of detecting large objects, such as cars, at tens of meters, while a metal detector's range is rarely more than 2 meters.

Magnetometers used in the Earth sciences are called geophysical surveys, a term that also embraces a wide range of other geophysical techniques including gravity, seismic refraction, seismic reflection, electromagnetics ( EM ), induced polarisation ( IP ), magneto-tellurics ( MT ), controlled source magneto-tellurics ( CSAMT ), sub-audio magnetics ( SAM ), mise-a-la-masse, resistivity, self Potential ( SP ) and Very Low Frequency ( VLF ).

Magnetometers are used in directional drilling for oil or gas to detect the azimuth of the drilling tools near the drill.

Magnetometers such as the German Forster are used to locate ferrous ordnance.

Magnetometers are one of the primary tools used to locate world-class deposits of gold, silver, copper, iron, tin, platinum and diamonds.

Magnetometers are also a component instrument on the Mercury MESSENGER mission.

Magnetometers can also be classified as " AC " if they measure fields that vary relatively rapidly in time, and " DC " if they measure fields that vary only slowly ( quasi-static ) or are static.

Magnetometers react very strongly to iron and steel, brick, burned soil, and many types of rock, and archaeological features composed of these materials are very detectable.

Magnetometers can also locate zones ignited by lightning ) and map siderite ( an impurity in coal ).

Magnetometers may also use a variety of different sensor types.

Magnetometers used in geophysical survey may use a single sensor to measure the total magnetic field strength, or may use two ( sometimes more ) spatially separated sensors to measure the gradient of the magnetic field ( the difference between the sensors ).

Airborne Magnetometers detect the change in the earth's magnetic field using sensors attached to the aircraft in the form of a " stinger " or by towing a magnetometer on the end of a cable.

Magnetometers detect minute deviations in the Earth's magnetic field caused by iron artifacts, kilns, some types of stone structures, and even ditches and middens in archaeological geophysics.

Magnetometers have a very diverse range of applications, including locating objects such as submarines, sunken ships, hazards for tunnel boring machines, hazards in coal mines, unexploded ordnance, toxic waste drums, as well as a wide range of mineral deposits and geological structures.

Magnetometers measure minute differences in the magnetic field of the earth caused by ferrous concentrations ( and iron objects ) in the soil, thermo-remnant magnetism of fired clays, and differences in the magnetic susceptibility of disturbed soils.

Magnetometers can measure the magnetic fields of planets.

Magnetometers can give an indication of auroral activity before the light from the aurora becomes visible.

Magnetometers assist mineral explorers both directly ( i. e. gold mineralisation associated with magnetite, diamonds in kimberlite pipes ) and, more commonly, indirectly, such as by mapping geological structures conducive to mineralisation ( i. e. shear zones and alteration haloes around granites ).

Magnetometers monitor the auroral zone as well as the equatorial region.

* Magnetometers, usually of the flux gate type.

All the drivers knew about the plates and they also knew about the big floppy straw hat with shredded edges, the kind natives in travel ads wear when they are out joyfully chopping cane.

I think that we are here also talking of the kind of fear that a young boy has for a group of boys who are approaching at night along the streets of a large city.

By `` image '' is meant not only a visual presentation, but also remembered sensations of any of the five senses plus the feelings which are immediately conjoined therewith.

it is true that they are also extremely dull.

The networks for military communications are one of the best examples of networks which not only must be changed with the changes in objectives but also must be changed with the addition of new machines of war.

We are also struck by the fact that this story of a boy's love for his mother does not offend, while the incestuous love of the man, Paul Morel, sometimes repels.

He and also Mr. Cowley and Mr. Warren have fallen to the temptation which besets many of us to read into our authors -- Nathaniel Hawthorne, for example, and Herman Melville -- protests against modernism, material progress, and science which are genuine protests of our own but may not have been theirs.

On December 21, the day that the Irish House of Commons petitioned for removal of Sir Constantine Phipps, their Tory Lord Chancellor, Molesworth reportedly made this remark on the defense of Phipps by Convocation: `` They that have turned the world upside down, are come hither also ''.

Among measures in anticipation of crisis are plans to inject into the turmoil as assistants of key decision makers qualified persons who are cognizant of the corrosive effect of crisis upon personal relationships and are also able to raise calm and realistic voices when overburdened leaders near the limit of self-control.

Very likely it will also include a recognition that the work we are reading reflects or `` belongs to '' some way of thought labelled as a `` school '' or an `` -ism '', i.e. a complex or `` syndrome '' of ideas occurring together with sufficient prominence to warrant identification.

Greek boys and girls also go for rock-and-roll, and the stations most tuned to are those carrying United States overseas programs.

They both measure literature by moral standards, and in their political writings both allow for censorship, but the differences between them are also significant.

We may further grant to those of her ( Poetry's ) defenders who are lovers of poetry and yet not poets, the permission to speak in prose on her behalf: let them show not only that she is pleasant but also useful to States and to human life, and we will listen in a kindly spirit ; ;

Occupational choices are also useful -- and interesting -- in bringing out clearly that values do not constitute the only component in goals and aspirations.

The students who are most willing to acquiesce in the suppression of civil liberties are also those who are most likely to be prejudiced against minority groups, to be conformist and traditionalistic in general social attitudes, and to lack a basic faith in people.

This finding is consistent also with the fact that student leaders are more likely to be supporters of the values implicit in civil liberties than the other students.

In this sense also, they are surely conformists.

Of course I hope Hal can also, but those hopes are much more faint ''.

The novel, which is not merely dystopian but also brilliantly satiric, describes a future America where one-sixteenth of the population, the men who run advertising agencies and big corporations, control the rest of the people, the submerged fifteen-sixteenths who are the workers and consumers, with the government being no more than `` a clearing house for pressures ''.

But I will also remind them that I have always been inclined to skepticism, to a kind of Laodicean lack of commitment so far as public affairs are concerned ; ;