UNSPSC 41111505: Calibration weights or weight sets

UNSPSC 41111505 Calibration weights or weight sets is a Commodity code that covers precision weights and weight sets procured by state and local agencies as part of broader laboratory equipment calibration, maintenance, and certification services. State and local buyers under this code purchase calibration weights in conjunction with annual calibration contracts for analytical balances, pipettes, thermometers, and related laboratory and industrial hygiene instrumentation. The work involves both the supply of certified weight sets and the calibration services that verify and certify them to NIST standards or equivalent traceable references. Issuing bodies include state departments (California Department of Toxic Substances Control, California Department of Fish and Wildlife, California Department of Industrial Relations), counties (Orange County), cities (Arlington, Texas), and cooperative purchasing vehicles serving multiple public entities (Sourcewell).

Recent activity concentrates in California, driven by state laboratory accreditation requirements and environmental compliance mandates. The California Department of Fish and Wildlife issued IFB P2675012 in September 2026 for calibration and maintenance of nine analytical balances, up to three weight sets (17 weights each), and one class 1 QA reference weight set (22 weights) at two Sacramento-area laboratories with bids due October 5, 2026 and contract performance spanning three years from December 1, 2026 through November 30, 2029; the California Department of Toxic Substances Control posted IFB I-2627-04 in late September 2026 for annual calibration of balances and weight sets at the Environmental Chemistry Laboratory in Berkeley with bids due October 21, 2026. The Orange County Public Works Department issued a five-year usage agreement (IFB 0803068001RE, due August 10, 2026) for EPA Protocol calibration and audit gases to support a cogeneration gas turbine Continuous Emissions Monitoring System, structured with firm fixed pricing covering all costs including delivery to Santa Ana with a 5% local small-business and DVBE bid-price preference. The California Department of Industrial Relations solicited calibration services for industrial hygiene equipment under two contracts (IFB S26DOSH005 valued at $750,000 over three years and IFB S26DOSH008 valued at $275,000 over three years), both requiring ISO/IEC 17025 accreditation and NIST traceability. Sourcewell, a Minnesota cooperative, issued an RFP (26RFP111026, due November 10, 2026) for laboratory and science equipment, supplies, and related services available to its member public entities.