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.


NIST Glass Beads

NIST Glass Beads

Starting at $781.50
Models: BS-5, BS-10, BS-20, BS-30A, BS-40B
NIST Sand, No. 30 - No. 325
Model: BS-42
Sieve Calibration Beads

SRMs 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. SRMs 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 Sand is 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.
  • NIST 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.