approaches. Demand has increased for disposable sensors for short-term monitoring or single-shot measurements, due to their low cost and simpiclity of use. Using this class of sensors, information can be obtained without the need for recalibration, and without potential contamination.

Classification of measurement errors

A good sensor obeys the following rules:

* it is sensitive to the measured property
* it is insensitive to any other property likely to be encountered in its application, and
* it does not

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