Standard Reference Materials (SRMs) 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 SRMs are created using equipment traceable to the 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.
For more information on Reference Materials, read our blog Reference Materials For Test Sieves: Performance Testing For Quality.