By Jayson · Updated August 2026 · 8-minute read Quick answer: OIML weight classes rank calibration weights by accuracy, from E1 (most precise) down to M3 (least). The class tells you the tolerance — how far the weight is allowed to be from its true value. Match the class to your scale: analytical balances need … Read more
By Jayson · Updated August 2026 · 9-minute read Quick answer: NIST NIST Handbook 44 is the US rulebook for commercial weighing devices. It defines how scales must be built, marked, tested, and how accurate they have to be. NIST publishes it every year; states adopt it into law. It’s the technical foundation for NTEP … Read more
By Jayson · Updated August 2026 · 8-minute read Understanding legal for trade scales is essential for any business involved in weight-based transactions. Quick answer: A legal-for-trade scale is one approved for buying and selling by weight. It has passed NTEP evaluation, meets NIST Handbook 44, and is checked by a state weights and measures … Read more
By Jayson · Updated August 2026 · 9-minute read Quick answer: Weights and measures are the official standard units — the pound, the gram, the gallon — that governments define and enforce so every scale reads the same. In the US, NIST sets the standards and your county’s weights and measures office checks that commercial … Read more
By Jayson · Updated July 2026 · 6-minute read Quick answer: Calibration is the technical job of testing and adjusting a scale so it reads correctly — done by a certified technician. A Weights and measures inspection is the official government check that the scale meets legal tolerances — done by a state or county … Read more