Yokogawa Corp. of America, Atlanta, Ga., acquired all outstanding shares of stock of Measurementation Inc., Houston, Tex., from its affiliated holding company, Yokogawa USA Inc. The relationship between the two companies began in 1997 when The Yokogawa Group purchased an interest in Measurementation. As a result of the acquisition, Measurementation will operate as a separate division of Yokogawa Corp. of America and will be managed by John Williams, one of the original founders.