Maine Scale Certification & Weights and Measures

Maine uses a combined model: state inspectors cover much of the state, while municipal sealers handle inspections in the towns and cities that appoint one. If you operate a commercial scale in Maine — 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 Maine?

The state Weights and Measures program tests and evaluates commercial devices, investigates fraud, and also trains, supervises and provides calibration services to municipalities that appoint their own local Weights and Measures Sealers under 10 M.R.S. ch. 501, sub-ch. 4-A. Scale owners contact the state program in Augusta (or their municipal sealer where one exists).

What Maine requires of scale owners

Maine publishes no device registration requirement for owners; devices must be tested/sealed under state or municipal sealer inspection. Scale/meter dealers, repair persons and public weighmasters must be licensed with DACF, and service companies file Placed In-Service Reports when scales or motor fuel dispensers are installed or repaired.

Getting a scale into service — 4 steps

1. Buy a legal-for-trade (NTEP-certified) scale appropriate for your application and capacity.
2. Confirm your jurisdiction — call the state program at (207) 287-3841 to learn whether a state inspector or your municipal sealer covers your location.
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