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Sampling hood

Is a device used to perform odour measurements on active sources such as biofilters.  It essentially is composed of a conical or pyramidal shape that encloses an area of the…

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Sampling materials

Sampling materials used throughout the odour measurement process (from obtaining sample to analysis) require an absent or minimized inference with the odorant gas.  The main criteria for material of the…

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Sensory fatigue

The inability or decreased ability to perceive an odour as continued exposure to that odour increases over time.  An odour may initially be strongly detectable but may diminishes completely in…

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Source sampling

The process of obtaining an odourous sample.  Various equipment and standard methods applied depending on the source characteristics.  For example, a passive area will require different equipment for sampling than…

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Specific Odour Emission Rate (SOER)

Determines the odour concentration per time and area (flux).  It is calculated by taking the product of the odour concentration and flow rate inside a sampling hood, divided by the…

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Static dilution

The mixing of odourous gas and diluting neutral gas by volume. Often done in a form of bottle or container, it is used to store and use standards of violate…

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Static flux hood

In the case of passive sources, a device is required to perform a direct measurement of the source.  Coverings or ‘hoods’ are usually used to achieve this and one such…

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Static olfactometer

A device which mixes neutral gas (odourless air) with odourous gas in specified ratio by volume and delivers mixture to an outlet for analysis

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Step factor

A factor which is used to calculate proceeding dilutions during olfactometry analysis.  A ratio of the current dilution to the step factor calculates the next dilution in the dilution series….

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