NIST Traceable Size Standard Microspheres

NIST-traceable size standard microspheres for instrument calibration, validation, and quality control. Lab261 supplies polystyrene and PMMA size standards with diameter measurements traceable to NIST reference materials, accompanied by certificates documenting nominal size, certified diameter, and traceable measurement uncertainty. Used to calibrate flow cytometers, particle counters, light-scattering instruments, microscopy systems, and ICP-MS workflows. Available across a range of nominal sizes; contact us for the current list of NIST-traceable SKUs and to confirm availability for your specific calibration target. Each shipment includes the traceability certificate and a Certificate of Analysis.