Sensors and measurement uncertaintyMore and more measurements are made by means of different sensors. At the same time estimation of measurement uncertainty of measurement results (for characterizing their precision and bias – collectively termed as accuracy) is becoming increasingly important. Traditionally there has been no “single-point-reference” with information and guidance on uncertainty estimation for measurements with sensors. This situation has now changed as we have recently published a tutorial review article in journal SensorsMeasurement Uncertainty Estimation in Amperometric Sensors: A Tutorial Review” (Helm, I.; Jalukse, L.; Leito, I. Sensors 2010, 10, 4430-4455).

This tutorial focuses on measurement uncertainty evaluation in amperometric sensors (both for liquid and gas-phase measurements). The main uncertainty sources (both in terms of precision and bias) are reviewed and their contributions are discussed with relation to the principles of operation of the sensors, measurement conditions and properties of the measured samples. The discussion is illustrated by case studies (dissolved oxygen measurement) based on the two major approaches for uncertainty evaluation – the ISO GUM modeling approach and the Nordtest approach. This tutorial is expected to be of interest to workers in different fields of science who use measurements with amperometric sensors and need to evaluate the uncertainty of the obtained results but are new to the concept of measurement uncertainty. The tutorial is also expected to be educative in order to make measurement results more accurate.

Since Sensors is an open-access journal, this article is available to everyone free of charge.

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