Cleveland, OH-Parker Hannifin announced that it has acquired Porter Instrument Company, Inc., a global leader in analytical, industrial, medical and dental instrumentation. Parker purchased Porter Instrument for an undisclosed amount. Porter’s annual revenue for the year ended 2004 was approximately $35 million. The acquisition is expected to be accretive in its first full year of integration. Since 1968, Porter Instrument Company has specialized in the development and manufacture of precision instruments that measure and control gases and liquids. Porter’s 56,000 sq. ft. headquarters and manufacturing facility is located in Hatfield, Pennsylvania.