2025 Editions of NIST Handbooks 44, 130 and 133

The 2025 editions of  NIST Handbook 44, NIST Handbook 130, and NIST Handbook 133 are now available electronically in PDF and Word formats on the OWM website. Printing of the current editions is currently underway, and it is anticipated that they will be shipped to all new NCWM members in mid-January 2025.

Please note that this year (2025) is the last year that printed copies of NIST Handbooks 44, 130, and 133 will be available through NIST OWM. All future copies of NIST Handbooks will be available in fully electronic formats via our NIST Handbook webpage. To benefit all stakeholders, over the next couple of years NIST will be working on converting each Handbook into fully indexed and searchable digital forms, for which individualized content can be easily extracted and displayed (e.g., via web browsers) and/or downloaded and printed on-demand by each NCWM member or other stakeholders.

NIST Handbook 44 had several updates. The most extensive change was to Section 2.20. Scales. Multiple paragraphs were amended to properly refer to the verification scale interval (e) rather than the scale division (d). There were also significant changes made to Section 3.40. Electric Vehicle Fueling Systems relating to accuracy requirements and test procedures. A new tentative Section 3.41. Non-Utility Electricity-Measuring Systems was also added. While not intended for enforcement due to the tentative status, this section is applicable to electrical sub-metering devices.

NIST Handbook 130 had updates to Section IV. Uniform Regulations specifically to subsection D. Voluntary Registration of Service Persons and Service Agencies for Commercial Weighting and Measuring Devices and subsection F. Uniform Fuels and Automotive Lubrication Regulations for biodiesel and biodiesel blends. NIST Handbook 133 had updates to the test procedures for packages labeled by weight (Chapter 3) for deviations caused by moisture loss as related to Cannabis and updates to the test procedures to provide clearer technical guidance on the preparation and maintenance of ice water for ice cream novelties. Furthermore, updates to test procedures for packages labeled by count (Chapter 4) for checking the contents of specific agriculture seed packages and the associated Appendix D describing the Association of Official Seed Analysts (AOSA) rules for testing seed. These updates reflect ongoing efforts to improve the accuracy, consistency, and equity of model laws, regulations, and standards for commercial weighing and measuring devices.

The 2024 NIST Summary of U.S. Legal Metrology Activities (NIST SP 2200-06) is now available. NIST OWM publishes this annual summary of U.S. legal metrology activities to serve as a central repository of citable sources of legal metrology and weights and measures meeting synopses, technical activity and working group summaries, and other inclusive information that may be relevant to our partners, customers, and U.S. and international stakeholders. It includes a summary of changes made to NIST Handbooks 44, 130 and 133 through the National Council on Weights and Measures (NCWM) and the regional Weights and Measures Association meetings together with relevant background information of each technical item as described in the OWM Technical Analysis for the preceding Interim and Annual NCWM meetings.