Delaware Scale Certification & Weights and Measures

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

State DDA Weights and Measures inspectors test all commercial devices statewide (gas pumps, grocery scales, vehicle scales, fuel-delivery meters, checkout scanners) and place a visible inspection seal on approved devices; there is no county/local program. Owners contact the Dover office.

What Delaware requires of scale owners

Delaware publishes no device registration or fee for scale owners; devices must pass state inspection and carry the state inspection seal. Servicepersons who install or repair commercial weighing/measuring devices register with DDA (one-time $25 fee, passing the Delaware exam or qualifying via reciprocity with another state or NCWM RSA certification, plus certificates for their standards); public weighmasters are licensed separately.

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 Delaware Department of Agriculture at (302) 698-4602 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