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Terms starting with E
Definition
A type of air sensor where the target gas interacts with an electrode thereby producing an electrical current that is proportional to the concentration of the target gas.
Electromotive Force (EMF) is a concept in physics related to electrical circuits and the potential difference that drives the flow of electric current. Despite its name, EMF is not a force in the mechanical sense but rather an electrical potential difference or voltage. It represents the energy per unit charge supplied by a source, such as a battery or a generator, to move electric charge through a circuit. Strong electromotive force (EMF) disrupts the sensor functioning and generates erroneous results.
An enclosure is a case or structure that contains the sensor and its components and protects the components from water, light, temperature variations (e.g., by adding heaters or cooling fans), and electromagnetic noise. The sensor enclosure must allow air to reach the sensing components while shielding the components from weather effects.
A measure of the disagreement between the pollutant concentrations reported by the sensor and the reference instrument. One way to measure error is by calculating the root mean square error (RMSE). Additional ways include calculating the mean bias error (MBE), mean absolute error (MAE), among others.
