RSA 438:10 General Testing.

When not otherwise provided by law, the commissioner, or his inspectors at his direction, shall have the power to inspect and test to ascertain if they are correct all weights and measures kept, offered, or exposed for sale. It shall be the duty of the commissioner, as he may deem necessary, to inspect and test to ascertain if they are correct all weights and measures commercially used (1) in determining the weight, measurement, or count of commodities or things sold, or offered or exposed for sale, on the basis of weight, measure, or of count, or (2) in computing the basic charge or payment for services rendered on the basis of weight, measure, or of count; provided, however, that with respect to single-service devices (that is, devices designed to be used commercially only once and to b