Weights and Measures

The following devices require registration with MDA Weights and Measures by January 1, 2026. The open enrollment period begins October 1st. Questions should be directed to [email protected].

DEF Retail Meters
Electric Vehicle Equipment (AC & DC)
Mass Flow meters

See the New Device Registration Form for more information to the right.

The Maryland Department of Agriculture Weights and Measures program has announced that registration for Electric Vehicle Service Equipment (EVSE chargers) will open on October 1, 2025. This open registration period will run through December 31, 2025.

All EVSE chargers used in a commercial transaction with a customer to establish a charge are required to be registered with the department on or before January 1, 2026. After this date, all EVSE chargers will be required to be registered prior to being available for customer use.

Applicants should complete one form per individual location, include the number of ports, and complete all required information.

Please direct any questions and completed registration forms to the Weight and Measures Program at [email protected]. You will be contacted within 5 business days for the next step in the process.

Device Registration Application

The MDA Weights and Measures program directly benefits all Marylanders by ensuring the fairness and equity of all commercial transactions involving determinations of quantity. This includes such day-to-day activities as:

the sale of food that is weighed by a scale in a supermarket;
the sale of gasoline through a gasoline pump; or,
the sale of fuel oil through a truck mounted meter.

Starting January 1, 2025, Weights and Measures will begin to register Service Agencies and Technicians involved in the installation and repair of EV chargers in The State of Maryland. Please contact Alison Wilkinson at [email protected] for additional information and requirements.

Untitled design (45).png Maryland weights and measures officials inspect and regulate devices used in determining the quantity of commodities as diverse as fuel oil, food products, livestock, grain, and precious metals.

Electronic scanning devices at the check-out counters in retail stores are inspected periodically in order to audit and verify prices stored in the retailer's computer. This office also regulates firewood and coal sales, even the amount of crab sold at a seafood store.

In addition to inspecting measuring devices, Weights and Measures officials also: Untitled design (46).png

test the net contents of packaged goods that are labeled by weight, volume, or count;
conduct undercover buying and selling to insure that the entire transaction is conducted in an honest manner; and,
investigate consumer complaints.

Untitled design (47).png Typically each year field staff conduct 35,000 to 45,000 inspections of commercial weighing and measuring devices and test about 4,000 individual lots of prepackaged commodities offered for sale.