Yokogawa Corp. of America, Newnan, Ga., and The Gas Co., Honolulu, Hawaii, signed a contract for Yokogawa to supply a turn-key distributed control system (DCS), field instruments and electrical installation services for The Gas Co.'s synthetic natural gas plant in Honolulu. The Gas Co. is using Yokogawa technology and turn-key project services to convert from mainly a pneumatic process control plant to a fully integrated DCS control system.