UNSPSC 41111505: Calibration weights or weight sets

UNSPSC 41111505 Calibration weights or weight sets (Commodity) covers specialized measurement and analytical equipment that state and local governments procure to support environmental compliance, public health operations, and water quality testing. Recent solicitations show that state and local agencies are buying calibration gases conforming to EPA protocols, lab information management systems, digestion block equipment for nutrient analysis, and related calibration and certification services. The mix of issuing bodies includes county public works departments, city water utilities, county public health agencies, and state program boards. Work under this code centers on procuring equipment and consumables that enable agencies to meet regulatory emissions monitoring, environmental testing, and laboratory analytical requirements—often with strict traceability to National Institute of Standards and Technology (NIST) reference materials and EPA-mandated methods.

The County of Orange, California, issued an IFB on June 26, 2026 (due August 10, 2026) for EPA Protocol Calibration and Audit Gases to support continuous emissions monitoring at its Central Utility Facility, with a five-year fixed-price usage agreement covering 13 line items of gas mixtures in 144-cubic-foot cylinders and 24-hour delivery capability; the solicitation offers a 5% local small business and DVBE preference. The City of Fort Worth, Texas, issued an RFQt on March 19, 2026 (due March 25, 2026) for a programmable TKN/TPO4 Digestion Block System meeting EPA Methods 351.2 and 365.4 for the Water Department, with installation, training, and freight included. The County of Santa Clara, California, posted an RFI on April 7, 2026 (due April 22, 2026) for a Public Health Lab Information Management Solution Replacement. Recent activity concentrates in California and Texas, with California showing the heaviest concentration of competitive procurements in this commodity space.