Exhibit 31.2

CERTIFICATIONS

I, William R. Sprow, certify that:

1. I have reviewed this quarterly report on Form 10-QSB for the quarter ended
May 31, 2006 of Sentex Sensing Technology, Inc,;

2. Based on my knowledge, this report does not contain any untrue statement of a
material fact or omit to state a material fact necessary to make the statements
made, in light of the circunstances under which such statements were made, not
misleading with respect to the period covered by this report.

3. Based on my knowledge, the financial statements, and other financial
information included in this report, fairly present in all material respects the
financial condition, results of operations and cash flows of the small business
issuer as of, and for, the periods presented in this report.

4. The small business issuer's other certifying offer(s) and I are responsible
for establishing and maintaining disclosure controls and procedures (as defined
in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over
financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)
for the small business issuer and have:

      e)    designed such disclosure controls and procedures, or caused such
            disclosure controls and procedures to be designed under our
            supervision, to ensure that material information relating to the
            small business issuer, including its consolidated subsidiaries, is
            made known to us by others within those entities, particularly
            during the period in which this report is being prepared;

      f)    designed such internal control over financial reporting, or caused
            such internal control over financial reporting to be designed under
            our supervision, to provide reasonable assurance regarding the
            reliability of financial reporting and the preparation of financial
            statements for external purposes in accordance with generally
            accepted accounting principles;

      g)    evaluated the effectiveness of the small business issuer's
            disclosure controls and procedures and presented in this report our
            conclusions about the effectiveness of the disclosure controls and
            procedures, as of the end of the period covered by this report based
            on such evaluation; and

      h)    disclosed in this report any change in the small business issuer's
            internal control over financial reporting that occurred during the
            small business issuer's most recint fiscal quarter (the small
            business issuer's fourth fiscal quarter in the case of an annual
            report) that has materially affected, or is reasonable like to
            materially affect, the small business issuer's internal control over
            financial reporting; and

5. The small business issuer's other certifying officer(s) and I have disclosed,
based on our most recent evaluation of internal control over financial
reporting, to the small business issuer's auditors and the audit committee of
the small business issuer's board of directors (or persons performing the
equivalent functions):

      c)    all significant deficiencies and material weaknesses in the design
            or operation of internal control over financial reporting which are
            reasonable likely to adversely affect the small business issuer's
            ability to record, process, summarize and report financial
            information; and

      d)    any fraud, whether or not material, that involves management or
            other employees who have a significant role in the small business
            issuer's internal control over financial reporting.

Date: July 14, 2006

/s/ William R. Sprow, Chief Financial Officer
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Signature & Title

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