Standard Reference Materials

Standard Reference Materials (SRM’s) are precisely sized glass beads or powders used for fast and accurate performance testing of sieves and to establish effective opening sizes.


Sieves can remain in service with no need for shipment to calibration labs. Periodic checks serve as an indicator of when to replace sieves. The SRM’s are created using equipment traceable to National Institute of Standards and Technology (NIST) or the European Community Bureau of Reference (BCR) and are supplied with documentation and charts to calculate effective openings.

  • Whitehouse Sieve Standards are highly spherical glass beads for testing single sieves from 8in to 18in (200 to 450mm) diameter, with openings from No.6 to No. 635 (3.35mm to 20µm).
  • NIST Reference Materials are glass beads and mineral powders produced by NIST used to calibrate sieves and cement testing instruments like the Wagner Turbidimeter and Blaine Fineness Apparatus.