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                                                                     EXHIBIT 3.2

                          AMENDMENT NUMBER I TO SENTEX
                        SENSING TECHNOLOGY, INC.'S BYLAWS



Section 8 of the Sentex Bylaws is hereby amended in its entirety to read as
follows:

"The number of directors shall not be less than one nor more than ten as may be
determined from time to time by resolution of the board. Unless otherwise
provided in the Certificate of Incorporation, any vacancy in the board,
including a vacancy caused by an increase in the number of directors, may be
filled by the affirmative vote of a majority of the remaining directors, even
though by less than a quorum of the board, or by a sole remaining director."