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  2. Magnetic anomaly detector - Wikipedia

    en.wikipedia.org/wiki/Magnetic_anomaly_detector

    The term typically refers to magnetometers used by military forces to detect submarines (a mass of ferromagnetic material creates a detectable disturbance in the magnetic field). Military MAD equipment is a descendant of geomagnetic survey or aeromagnetic survey instruments used to search for minerals by detecting their disturbance of the ...

  3. Magnetometer - Wikipedia

    en.wikipedia.org/wiki/Magnetometer

    The caesium and potassium magnetometers are typically used where a higher performance magnetometer than the proton magnetometer is needed. In archaeology and geophysics, where the sensor sweeps through an area and many accurate magnetic field measurements are often needed, caesium and potassium magnetometers have advantages over the proton ...

  4. MEMS magnetic field sensor - Wikipedia

    en.wikipedia.org/wiki/MEMS_magnetic_field_sensor

    The range of magnetometers based on piezoelectric resonators is mV/T (millivolt/Tesla), so higher responsivity is generally better. [5] Resolution refers to the smallest magnetic field a device can measure. The smaller the number, the more sensitive the device. The range of magnetometers based on piezoelectric resonator is a few nT (nanoTesla). [5]

  5. Magnetic anomaly - Wikipedia

    en.wikipedia.org/wiki/Magnetic_anomaly

    It had a caesium vapor scalar magnetometer and a fluxgate vector magnetometer. [7] CHAMP , a German satellite, made precise gravity and magnetic measurements from 2001 to 2010. [ 8 ] [ 9 ] A Danish satellite, Ørsted , was launched in 1999 and is still in operation, while the Swarm mission of the European Space Agency involves a "constellation ...

  6. Metal detector - Wikipedia

    en.wikipedia.org/wiki/Metal_detector

    Contamination of food by metal shards from broken processing machinery during the manufacturing process is a major safety issue in the food industry. Most food processing equipment is made of stainless steel, and other components made of plastic or elastomers can be manufactured with embedded metallic particles, allowing them to be detected as ...

  7. SQUID - Wikipedia

    en.wikipedia.org/wiki/SQUID

    A SQUID (superconducting quantum interference device) is a very sensitive magnetometer used to measure extremely weak magnetic fields, based on superconducting loops containing Josephson junctions. SQUIDs are sensitive enough to measure fields as low as 5×10 −18 T with a few days of averaged measurements. [ 1 ]

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