For the purposes of this chapter, the following terms shall have the meanings respectively ascribed to them by this section:
(1) REGISTERED SERVICE AGENT. Any individual, agency, firm, company, or corporation that for hire, commission, or other payment of any kind, services, repairs, or reconditions any weighing or measuring devices, and that registers with the Commissioner of Agriculture and Industries.
(2) SELL or SALE. Such terms shall include barter and exchange.
(3) WEIGHTS, MEASURES or WEIGHING OR MEASURING DEVICES. Such terms include all weights, scales, beams, measures of every kind, instruments and mechanical devices for weighing, or measuring, and any appliances and accessories connected with any or all such instruments.