Conceptually, a sensor is a component with a single output as in Illustration $7.$ A sensor outputs a signal that varies over time. When dealing with signals that represent physical phenomena, we can think of a sensor as a device that converts energy from one form $($heat$,$ light, pressure, etc.. to another form $($typically an electrical voltage.. Which following parameters are important with sensors$?$

$1-$ Range

$2-$ Resolution

$3-$ Signal Quality

$4-$ S$/$N Ratio

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$2,4$

$3,4$

$1,3$

$1,2,3,4$