NIST Handbook 44 - Current Edition

Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices
Current Version - 2025

as adopted by the 109th National Conference on Weights and Measures

Full Document PDF

• Title Page DOCX | PDF
• 2024 Amendments/Editorial Changes DOCX | PDF
• Introduction DOCX | PDF

Section 1

• 1.10. General Code DOCX | PDF

Section 2

• 2.20. Scales DOCX | PDF
• 2.21. Belt-Conveyor Scale Systems DOCX | PDF
• 2.22. Automatic Bulk Weighing Systems DOCX | PDF
• 2.23. Weights DOCX | PDF
• 2.24. Automatic Weighing Systems DOCX | PDF
• 2.25. Weigh-In-Motion Systems – Used for Vehicle Enforcement Screening – Tentative Code DOCX | PDF

Section 3

• 3.30. Liquid-Measuring Devices DOCX | PDF
• 3.31. Vehicle-Tank Meters DOCX | PDF
• 3.32. Liquefied Petroleum Gas and Anhydrous Ammonia Liquid-Measuring Devices DOCX | PDF
• 3.33. Hydrocarbon Gas Vapor-Measuring Devices DOCX | PDF
• 3.34. Cryogenic Liquid-Measuring Devices DOCX | PDF
• 3.35. Milk Meters DOCX | PDF
• 3.36. Water Meters DOCX | PDF
• 3.37. Mass Flow Meters DOCX | PDF
• 3.38. Carbon Dioxide Liquid-Measuring Devices DOCX | PDF
• 3.39. Hydrogen Gas-Measuring Devices DOCX | PDF
• 3.40. Electric Vehicle Fueling Systems DOCX | PDF
• 3.41. Non-Utility Electricity-Measuring Systems – Tentative Code DOCX | PDF

Section 4

• 4.40. Vehicle Tanks Used as Measures DOCX | PDF
• 4.41. Liquid Measures DOCX | PDF
• 4.42. Farm Milk Tanks DOCX | PDF
• 4.43. Measure-Containers DOCX | PDF
• 4.44. Graduates DOCX | PDF
• 4.45. Dry Measures DOCX | PDF
• 4.46. Berry Baskets and Boxes DOCX | PDF

Section 5

• 5.50. Fabric-Measuring Devices DOCX | PDF
• 5.51. Wire- and Cordage-Measuring Devices DOCX | PDF
• 5.52. Linear Measures DOCX | PDF
• 5.53. Odometers DOCX | PDF
• 5.54. Taximeters DOCX | PDF
• 5.55. Timing Devices DOCX | PDF
• 5.56 (a). Grain Moisture Meters DOCX | PDF
• 5.56 (b). Grain Moisture Meters DOCX | PDF
• 5.57. Near-Infrared Grain Analyzers DOCX | PDF
• 5.58. Multiple Dimension Measuring Devices DOCX | PDF
• 5.59. Electronic Livestock, Meat, and Poultry Evaluation Systems and/or Devices DOCX | PDF
• 5.60. Transportation Network Measurement Systems – Tentative Code DOCX | PDF

Appendices

• A. Fundamental Considerations DOCX | PDF
• B. Units and Systems of Measurement DOCX | PDF
• C. General Tables of Units of Measurement DOCX | PDF
• D. Definitions DOCX | PDF

Previous Handbook Editions