scope:

This 3-A Sanitary Standard applies to the sanitary aspects of refractometers and energy absorbing optical sensors used on fluid products equipment for sensing concentration, turbidity and/or color. The sensor begins at the instrument connection(s) and fitting(s) if required, process contact component(s) and all external component(s) necessary for operation.

To conform to this 3-A Sanitary Standard, refractometers and energy absorbing optical sensors shall conform to the following criteria for design, materials of construction, fabrication techniques and installation, as appropriate, and the current revisions or editions of all referenced documents cited herein.