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A superconducting quantum interference device (SQUID) is a very sensitive magnetometer used to measure extremely subtle magnetic fields based on superconducting loops containing Josephson junctions. SQUID represents the most accurate sensor to measure the magnetic field and voltage. Overview of the potential applications and possible improvements of SQUID are the aims of this work. In general, the transducers of physical quantities on voltage and magnetic field allow wide range of other applications. Such converters may lead to an improved universality of SQUID´s. Potential improvements was verified by simulation of series and parallel multiple quantum interference devices. It provides opportunities to improve their sensitivity.

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