Large and Small Scales

Weights and Measures investigators regularly conduct inspections to ensure equity of commercial measuring devices and commercial transactions involving quantity. We check over 21,000 small capacity scales used commercially to weigh items at check-out, at meat/deli counters, or in pawn shops or jewelry stores. All commercial scales are inspected for accuracy, suitability of equipment, proper installation, and that they are legal for retail trade.

Small, seemingly insignificant errors can add up. For example, assume a scale used for weighing cheese is incorrect by 0.01 pound. Only 100 uses of the scales per day for 300 days, at a unit price of $7.99 a pound, would result in an error of $2,397 per year. The only way you could know the scale was in error was if you tested it.

That is where our Division comes in. If you have a scale, used for commercial purposes, it's required to have a Division device license and have a Certificate of Conformance issued by the National Type Evaluation Program (NTEP).


Testing Procedures

Check out the NIST Handbook 44. It's what our Investigators follow when inspecting your scale(s).


Device License Requirements

A license from the Division is required for any commercial weighing, measuring or counting device used for commercial purposes in Arizona. If you are obtaining a license in the name of an individual, you are required you to fill out a form and submit proof of lawful presence. View the form and types of documents that are accepted as proof of lawful presence.

New Devices

To obtain a device license, submit a completed Device License Application/Placed-In-Service Report to AZDA Licensing. You will be issued a Business Multi-Function (BMF) number and billed for the device license once the application is reviewed and approved. Your BMF number is your license number. 

Licensed device changes must be reported to the Division within 7 days of the change. If transferring a license, the new licensee shall notify the Division of the following: new business name, address and the location of the device(s). NOTE: all devices used for commercial purposes must be NTEP-approved.


Important Documents

Device License Application/Placed-In-Service Report (PISR) Download
Fee Codes, Fees, and Penalties (WMSD) Download
Small Scale Brochure Download
Statement of Lawful Presence Download
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