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Wyoming Scale Certification & Weights and Measures

✓ Verified from official sources — July 11, 2026

Wyoming runs a state-managed weights and measures program — commercial scale owners deal with the state agency directly. If you operate a commercial scale in Wyoming — 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 Wyoming?

State-run: WDA's Weights & Measures Program (Technical Services Division) tests, inspects, and certifies commercial scales and meters statewide and investigates short-weight/short-measure complaints; owners contact WDA in Cheyenne. State-licensed Registered Service Technicians (RSTs) are the private technicians authorized to repair and place devices in service.

What Wyoming requires of scale owners

Businesses operating commercial weighing/measuring devices obtain a Weights & Measures establishment license from WDA (application on the Technical Services forms page), and new or repaired devices are placed in service by a licensed Registered Service Technician who files a WDA Placing-in-Service Report. WDA then tests and certifies devices to NIST Handbook 44/133 standards, which Wyoming's Weights & Measures Law (Title 40, Ch. 10) adopts in their entirety.

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 Wyoming Department of Agriculture ((307) 777-7321 (WDA main); W&M Supervisor/State Metrologist Robert Weidler (307) 777-7556; office support & licensing (307) 777-7324) 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 Wyoming?
State-run: WDA's Weights & Measures Program (Technical Services Division) tests, inspects, and certifies commercial scales and meters statewide and investigates short-weight/short-measure complaints; owners contact WDA in Cheyenne. State-licensed Registered Service Technicians (RSTs) are the private technicians authorized to repair and place devices in service.
What does Wyoming require of scale owners?
Businesses operating commercial weighing/measuring devices obtain a Weights & Measures establishment license from WDA (application on the Technical Services forms page), and new or repaired devices are placed in service by a licensed Registered Service Technician who files a WDA Placing-in-Service Report. WDA then tests and certifies devices to NIST Handbook 44/133 standards, which Wyoming's Weights & Measures Law (Title 40, Ch. 10) adopts in their entirety.
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 Wyoming?

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

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Sources: agriculture.wy.gov/weights-measures | agriculture.wy.gov/ts-forms | agriculture.wy.gov/ts-contacts