LUMEL S.A. - the biggest polish producer of electrical measuring instruments offers: - meters for a.c. current or a.c. voltage - MA series - maximum ammeters with bimetallic movement - BA series - maximum ammeters with bimetallic and moving-iron movements - BE series - voltmeters equipped with a change-over switch - EP type - meters for d.c. current or d.c. voltage - EA series - frequency meters - CA series - power meters - PA series - power factor meters - FA series