Devices such as taximeters, farm milk tanks, wire and cordage meters, and berry baskets also fall under the jurisdiction of weights and measures. The seal indicates that that device has been inspected and was performing correctly and within the applicable tolerances. Not all weighing or measuring devices are under the jurisdiction of weights and measures. Public utility gas and electric meters are regulated by the Public Service Commission. Municipal water meters are regulated by the local water district.
Foods make up the majority of the packaged consumer commodities inspected for accurate net contents.
Commodities like cleaning agents, paints, and yard and garden products are also inspected. Wholesale packages and commodities are routinely inspected to protect businesses. Handbook 44 is used in all 50 states and contains specifications and tolerances against which each device is compared. This publication is a product of the National Conference on Weights and Measures and is updated annually to stay current with changing technology. In general, device tolerances are set to keep measuring errors as small as practical to protect both buyer and seller.