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Idaho Scale Certification & Weights and Measures

✓ Verified from official sources — July 11, 2026

Idaho runs a state-managed weights and measures program — commercial scale owners deal with the state agency directly. If you operate a commercial scale in Idaho — at a warehouse, farm, recycling yard, retail store, or truck stop — here is who regulates it, what the law requires, and exactly who to contact.

Who inspects commercial scales in Idaho?

State-run: ISDA Weights and Measures inspectors test commercial weighing and metering devices statewide - Idaho Code Title 71 (sec. 71-117) requires a State Seal showing ISDA approval - and owners work with ISDA W&M in Boise or their local ISDA inspector. A registered serviceman may place new or repaired equipment into service until ISDA can inspect and test it.

What Idaho requires of scale owners

Commercial devices (used to buy, sell, or determine an award) must be licensed annually (license year Feb 1-Jan 31; invoices mailed early January) and the license displayed or accessible at the device location; scales/meters placed in service must be reported to ISDA W&M within 30 days. Devices are subject to ISDA inspection and testing; licenses 30 days past due put devices in rejected status and at 45 days the business forfeits commercial use.

Devices used to buy or sell by weight must comply with NIST Handbook 44 — in practice this means an NTEP-certified, legal-for-trade scale. Confirm requirements for your device class with the office listed here.

Getting a scale into service — 4 steps

  1. Buy a legal-for-trade (NTEP-certified) scale appropriate for your application and capacity.
  2. Confirm registration and licensing requirements with the Idaho State Department of Agriculture ((208) 332-8690) before the scale enters commercial use.
  3. Arrange compliant installation and calibration. Where required, placing-in-service must be done by a licensed or registered service company.
  4. Stay compliant. Pass required inspections, keep calibration current, retain service records.

Common questions

Who certifies commercial scales in Idaho?
State-run: ISDA Weights and Measures inspectors test commercial weighing and metering devices statewide - Idaho Code Title 71 (sec. 71-117) requires a State Seal showing ISDA approval - and owners work with ISDA W&M in Boise or their local ISDA inspector. A registered serviceman may place new or repaired equipment into service until ISDA can inspect and test it.
What does Idaho require of scale owners?
Commercial devices (used to buy, sell, or determine an award) must be licensed annually (license year Feb 1-Jan 31; invoices mailed early January) and the license displayed or accessible at the device location; scales/meters placed in service must be reported to ISDA W&M within 30 days. Devices are subject to ISDA inspection and testing; licenses 30 days past due put devices in rejected status and at 45 days the business forfeits commercial use.
What is NTEP certification?
NTEP certifies that a scale model meets NIST Handbook 44 standards for commercial use. An NTEP Certificate of Conformance is the standard requirement for legal-for-trade devices across the U.S.
Where do I find official forms and fees?
Use the licensing and forms links in the office panel, or contact the office directly — fee schedules change and some are published only in application documents.

Need calibration, repair, or installation in Idaho?

Send one request — ScaleRegistry routes it to qualified service providers for your state.

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Sources: agri.idaho.gov/ag-inspections/weights-and-measures/ | agri.idaho.gov/ag-inspections/weights-and-measures/d…