The clear visual demonstration and concise verbal instructions are designed to help newcomers to the method or to act as a refresher for existing users. Access to the video is via the ‘sieve standards’ pages of the Whitehouse Sciebtific website where visitors can also download written instructions.

Whitehouse Scientific’s NIST Traceable Sieve Standards are narrow distribution glass microspheres that enable the on-site calibration of sieves from 20 to 3,350 µm. Accurate to 1 µm for smaller sieve apertures, these standards allow complete calibration in around two minutes and the results are independent of the sieve shaking method used. Furthermore, single shot bottles remove operator sampling errors, making the entire process more reliable and reproducible.