LSJ
τό, weigh-house, CIG 3705 (Apollonia ad Rhyndacum), JRS 2.87 (Antioch in Pisidia); pl., IGRom. 4.657 (Acmonia); -στασίου [τέλος] weighing-toll, BGU 337.20 (ii/iii AD).
zygostasii munus, office of ζυγοστάτης, Cod.Just. 11.28.1.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)