Device Repairman: Device Repairmen install, repair, and service commercial weighing and measuring devices. Weights and Measures Inspectors routinely monitor their work.

Devices: Commercial devices are inspected to verify their accuracy. A few examples of these devices are scales, gas pumps, water dispensers, taxi meters, and timing devices.

Petroleum: Petroleum products such as gasoline, diesel, motor oil, and brake fluid are routinely tested for octane, viscosity, and contamination. Advertising signs and pump price indicators are checked for accuracy, sizing, and legibility.

Quantity Control: Store scanner systems are routinely inspected to verify that customers are charged the correct price. Packaged commodities are inspected to verify that they are labeled correctly and that they contain the correct weight, count, or volume.

Weighmaster: Commodities are weighed, measured, or counted for the purpose of purchase or sale of that commodity. Weighmasters issue certificates to certify the weight, measure, or count for the buyer and seller.