Gilson stocks a number of Standard Reference Materials, (SRM's) issued by the US National Institute of Standards and Technology (NIST) for calibration of sieves, sedimentation instruments, particle counters, and other instruments.
BS-5, BS-10, BS-20, BS-30A and BS-40B are calibrated glass beads for determining effective sieve opening. (NOT for determining conformity to specifications.) They are also useful for calibration of electroformed sieves. The entire sample is placed on clean sieves and shaken in the manner that tests will be made on test samples. Percent of glass beads retained on each sieve is calculated, and effective opening of each of the sieves is determined from calibration data on the NIST Certificate supplied with the bead set.
BS-42 is a set of three 150g bottles of different sands for use in sieving. Material A is the coarsest for testing sieves from No.30No.100. Material C is for No.70No.200 sieves and Material D is for finer sieves, No.100No.325.
BS-45 is a full-range silicon nitride powder for evaluation and calibration of particle size distribution sedimentation-based instruments in the 0.210¼m range. Certification is by Sedigraph measurements. Five vials of 2.5g each are included. Similar BS-46 is a single 5g bottle of 0.332.19¼m irregularly shaped zirconium oxide powder with minimal agglomerates.
BS-50 Portland Cement No.114 is twenty units, each in a sealed pouch. This is used for Wagner Turbidimeter (ASTM C 115; AASHTO T 98), Blaine fineness apparatus (ASTM C 204; AASHTO T 153), the 2in diameter No.325 sieve used in fineness tests (ASTM C 430; AASHTO T 192), and others.
| Gilson Company, Inc. | |
|---|---|
| Product Category | Ferrite Beads |
| Product Number | BS-40B |
| Product Name | NIST Glass Beads for Sieves, #400 to #635 |
