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Created page with "== Introduction == Superconducting Quantum Interference Devices, or SQUIDs, are highly sensitive magnetometers used to measure extremely subtle magnetic fields. They are based on superconducting loops containing Josephson junctions. SQUIDs are among the most sensitive magnetic field detectors available, with noise levels as low as 3 fT Hz−½. == Principle of Operation == The basic principle of operation of a SQUID is the flux quantization in..."
