In typical industrial applications, measurements of parameters such as temperature, flow, or pressure simply involves finding a device with the right specifications that is packaged to provide reasonable durability and a satisfactory life in its operating environment.
The measurement range needed and special environmental concerns, such as exposure to corrosive liquids or gases help narrow down the choices. When these measurements involve products for human consumption, an additional set of requirements emerges. In this arena, product contamination can lead to product liability as well as harm to the end user. This is where 3-A sanitary standards come in. Unlike other types of standards, equipment displaying the 3-A Symbol can be shown to meet certain material, design and fabrication standards for cleanability and inspection.
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