Arizona runs a state-managed weights and measures program — commercial scale owners deal with the state agency directly. If you operate a commercial scale in Arizona — 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 Arizona?
State-run program: WMSD state inspectors license and test all commercial weighing and measuring devices and conduct retail/package inspections statewide; there are no county W&M programs. Scale owners contact WMSD at (602) 542-4373.
What Arizona requires of scale owners
Under A.R.S. 3-3451 every commercial device (including scales) must be licensed by WMSD: submit a Device License Application/Placed-In-Service Report to get a Business Master File (BMF) number, pay per-device fees, and renew via the online system; devices must have an NTEP or CTEP Certificate of Conformance, and license changes must be reported within 7 days. WMSD also licenses the Registered Service Agencies/Representatives who install and certify devices.
Getting a scale into service — 4 steps
- Buy a legal-for-trade (NTEP-certified) scale appropriate for your application and capacity.
- Confirm registration and licensing requirements with the Arizona Department of Agriculture ((602) 542-4373) before the scale enters commercial use.
- Arrange compliant installation and calibration. Where required, placing-in-service must be done by a licensed or registered service company.
- Stay compliant. Pass required inspections, keep calibration current, retain service records.
Common questions
Who certifies commercial scales in Arizona?
What does Arizona require of scale owners?
What is NTEP certification?
Where do I find official forms and fees?
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