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 Test Sieves are precision laboratory Instruments. They are gauges and require ongoing certification as such. With the popularity and enhanced awareness of detailed quality control systems, the demand for "Recertification" of "in-use" test sieves is growing daily.
W.S. Tyler performs the identical examination and provides the same documentation as with our "Certified" program.
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Aperture / Schedule (Whichever comes last )
5 inches to .25 inch / 80 uses or 36 months 
US No. 1/2 to US No. 12 / 70 uses or 30 months
US No. 14 to US No. 40 / 60 uses or 24 months
US No. 45 to US No. 140 / 50 uses or 18 months
US No. 170 to US No. 325 / 35 uses or 12 months
US No. 400 to US No. 635 / 20 uses or 6 months |
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