Fraser - An incorrect spelling of the the "Frazier" brand name. The Fraser spelling has permeated many international standards.
Please be aware that there are other firms selling "Frazier Permeability Testers" that are not our product. There are so many of our permeability instruments out in the field that people tend to call them "the Frazier" instead of an air permeability tester. Consequently other firms have been using our trademarked "Frazier" name with the permeability instruments that they are manufacturing. What you need to keep in mind is that the calibration process in "Frazier" brand testers is proprietary and other manufacturer's testers do not have the ability to test for "Frazier" Air Permeability (Frazier Number).
Frazier Air Permeability Tester