Exhibit 31.1   CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO SECTION
    302 OF THE
    SARBANES-OXLEY ACT OF 2002
  
  I, Gregory Witchel, certify that: 
  1. I have reviewed this annual report on Form 10-KSB of DiaSys Corporation;
  
  2. Based on my knowledge, this annual 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 annual report. 
  3. Based on my knowledge, the financial statements, and other financial information
  included in this annual 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 annual report.
  4. The Registrant's other certifying officer 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)) for the Registrant and have:


|a)                                                                                                                                                                                                                                                                         | 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 Registrant, including its consolidated subsidiaries, is
      made known to us by others within those entities, particularly during the
      period in which this annual report is being prepared;

|                                                                                                                                                                                          |                                                                                                                                       
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------
|b)                                                                                                                                                                                        | evaluated the effectiveness of the registrant'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                          
|                                                                                                                                                                                          |                                                                                                                                       
|c)                                                                                                                                                                                        | disclosed in this report any change
      in the Registrant's internal control over financial reporting that occurred
      during the
|registrant's most recent fiscal year that has
      materially affected, or is reasonably likely to materially affect, the Registrant's
      internal control over financial reporting .

|                                                                                                                                                   |                                                                                                                                               
|-------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------
|a)                                                                                                                                                 | all significant deficiencies and material weaknesses
      in the design or operation of internal control over financial reporting
      which
|are reasonably likely to adversely affect the
      Registrant's ability to record, process, summarize and report financial
      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 control over financial reporting.                                                                                                        

|Dated: September 29, 2004 | S/ GREGORY WITCHEL     
|------------------------- | -----------------------
|                          | Chief Executive Officer
|                          |