EXHIBIT 23.2


              CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS



We consent to the incorporation by reference in this Annual Report on Form
10-K/A for the year ended December 31, 2002, of our report dated February 28,
2003, appearing in the Registration Statement on Form S-8 (File No. 33-24505,
effective October 3, 1988, File No. 33-62209, effective December 20, 1988, and
File No. 33-66822, effective August 2, 1993) of O.I. Corporation filed with the
Securities and Exchange Commission pursuant to the Securities Act of 1933.




GRANT THORNTON LLP

Houston, Texas

April 1, 2003