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    STUDIA PHYSICA - Issue no. 1 / 2007  

Authors:  J.M. DE TERESA.
  Abstract:  Sensors have been used as detection elements for past decades. One simple and common example is the mercury thermometer used to measure the body temperature that relies on the Physical property called thermal expansion. In general, a sensor needs a transducer that transforms the measured magnitude in another one that is easier to interpret or visualize. Nowadays, most sensors require combination with electronic devices. The use of sensors has considerably increased in the last years due to the development of electronic signal processing. The domains of application of sensors cover fields such as medical instrumentation, automotive industry, industrial measurements, environment control, energy sources, safety, electrical appliances, chemical industry, etc.  
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