Exhibit 31.2
                    CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, Gordon R. Arnold, certify that:

     1.   I have reviewed this quarterly report on Form 10-QSB of Sierra Monitor
          Corporation;

     2.   Based on my  knowledge,  this  quarterly  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  circumstances
          under which such  statements were made, not misleading with respect to
          the period covered by this quarterly report;

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

     4.   I am responsible for establishing and maintaining  disclosure controls
          and  procedures  (as  defined  in  Exchange  Act Rules  13a-15(e)  and
          15d-15(e)) for the registrant and have:

          a.   designed such  disclosure  controls and procedures to ensure that
               material  information relating to the registrant is made known to
               me by others  within  those  entities,  particularly  during  the
               period in which this quarterly report is being prepared;

          b.   evaluated  the  effectiveness  of  the  registrant's   disclosure
               controls and  procedures as of a date within 90 days prior to the
               filing date of this quarterly report (the "Evaluation Date"); and

          c.   presented  in this  quarterly  report  my  conclusions  about the
               effectiveness of the disclosure  controls and procedures based on
               my evaluation on such evaluation Date;

          d.   Disclosed in this report any changes in the registrant's internal
               control  over  financial   reporting  that  occurred  during  the
               registrant's  most  recent  fiscal  quarter  that has  materially
               affected,  or is reasonable  likely to affect,  the  registrant's
               internal control over financial reporting;

     5.   I  have  disclosed,  based  on  my  most  recent  evaluation,  to  the
          registrant's auditors and the audit committee of registrant's board of
          directors (or persons performing the equivalent functions):

          a.   all  significant  deficiencies  and  material  weaknesses  in the
               design or operation of internal controls over financial reporting
               which are reasonable  likely to adversely affect the registrant's
               ability to record, process, summarize and report information; and

          b.   any fraud,  whether or not material,  that involves management or
               other employees who have a significant  role in the  registrant's
               internal controls over financial reporting.

Date:     May 12, 2004                    By:  /s/ GORDON R. ARNOLD
                                               ---------------------------------
                                               Gordon R. Arnold
                                               Chief Financial Officer


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