Exhibit 31.2

Rule 13a-14(a)/15d-14(a) Certification

I, Anthony J. Simonetta, certify that:

|1. | I have reviewed this Form 10-K/A
       of Strategic Diagnostics Inc. (the registrant);                                                                                                                                                                                                                                             
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|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
       circumstances under which such statements were made, not misleading with
       respect to the period covered by this report;
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|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 registrant as of, and for, the periods presented
       in this report;                   
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|4. | The registrants other certifying
       officers 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:                                                                                     
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|   | a)                                                                                                                                                                                                                                                                                                                                    
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|   | b)                                                                                                                                                                                                                                                                                                                                    
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|   | c)                                                                                                                                                                                                                                                                                                                                    
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|5. | The registrants other certifying
      officers and I have disclosed, based on our most recent evaluation of internal
      control over financial reporting, to the registrants auditors and
      the audit committee of the registrants board of directors (or persons
    performing the equivalent function):                 
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|   | a)                                                                                                                                                                                                                                                                                                                                    
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|   | b)                                                                                                                                                                                                                                                                                                                                    
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|Date: February 22, 2006 | By: | /s/ ANTHONY J.
    SIMONETTA                          
|----------------------- | --- | ------------------------------------------------------
|                        |     |                                                       
|                        |     | Anthony J. Simonetta                                  
|                        |     | Vice PresidentFinance and Chief
    Financial Officer



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