assizer

from The Century Dictionary.

• noun In English history, a member of a grand assize (which see, under assize).
• noun In Scotland, a juror.
• noun One who had custody of the assize or standards of weight and measure; one who fixed the assize of bread and ale, or other articles of general consumption.
• noun Also spelled assizor, assiser, assisor.

from the GNU version of the Collaborative International Dictionary of English.

• noun An officer who has the care or inspection of weights and measures, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun An officer who has the care or inspection of weights and measures.