NIST Reference Materials

Gilson offers a selection of Standard Reference Materials (SRM™) issued by the U.S. National Institute of Standards and Technology (NIST) for assessment of sieves and other instruments such as sedimentation instruments, particle counters and more.

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SRM™s are used on sieves in the same manner that tests would be performed, and a percentage of retained material is calculated for each sieve. Effective openings are determined from calibration data on the supplied NIST Certificate. SRM™s only determine average opening sizes and do not take the place of Verification Services, but are an economical way to monitor performance while allowing sieves to remain in service.

• NIST Glass Beads are calibrated and used in determining effective sieve openings, as well as in calibrating electroformed sieves. They are available in five different sizes, each designed for a specific sieve range and particle size.
• NIST Sands are used for sand sieve analysis and available models correspond with sieves from fine to coarse with a sieve range of No.30 to No. 325 and a particle size range of 600 to 45µm.
• Portland Cement No.114 is required in several ASTM and AASHTO standards for calibration of No.325 Fineness Test Sieve and Blaine Air Permeability Apparatus.