October 8, 1998



Board of Directors
Environmental Tectonics Corporation 
County Line Industrial Park 
Southampton, Pennsylvania  18906

Re:  Environmental Tectonics Corporation 1998 Stock Option Plan

Gentlemen:

     You have asked us to provide you with our opinion whether
the 500,000 shares of common stock, par value $0.10 per share
(the "Common Stock"), of Environmental Tectonics Corporation (the
"Company") that may be issued from time to time pursuant to the
exercise of options issued under the Environmental Tectonics
Corporation 1998 Stock Option Plan (the "Plan"), when and if such
shares are issued pursuant to and in accordance with the Plan,
will be duly and validly issued, fully paid and nonassessable. 
We, as counsel to the Company, have reviewed:

     1.   The Pennsylvania Business Corporation Law of 1988, as
          amended;

     2.   The Articles of Incorporation of the Company;

     3.   The By-laws of the Company; and

     4.   The minutes of the Board of Directors of the Company
          adopted on September 30, 1998, as certified by the
          Corporate Secretary of the Company.

     Based on our review of such documents, it is our opinion
that the Common Stock issuable upon the exercise of options
granted under the Plan, when and as issued and paid for in
accordance with the provisions of the Plan, will be duly and
validly issued, fully paid and nonassessable.  In giving the
foregoing opinion, we have assumed that the Company will have, at
the time of the issuance of such Common Stock, a sufficient
number of authorized shares available for issue.

     We consent to the filing of this opinion as an exhibit to
the registration statement the Company is filing today in
connection with the registration of 500,000 shares of the
Company's Common Stock, and to the reference to us under the
heading "legal matters" in the related Prospectus.  In giving
this consent, we do not thereby admit that we come within the
category of persons whose consent is required under Section 7 of
the Securities Act of 1933, as amended, or the Rules and
Regulations of the Securities and Exchange Commission thereunder.

                              Very truly yours

                              /s/ Stevens & Lee

                              STEVENS & LEE
WORD PERFECT SYSTEM

Long Document Name:      OPINION LETTER - ENVIRONMENTAL TECTONICS
                         CORPORATION 1998 STOCK OPTION PLAN
System Document Name:    O:\DMS\WJR\0087819.WP
Document Location:       Reading

Additional Information:

     DUPED RDG. DOC. #81638

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NOTE(S) TO NEXT WORD PROCESSING SPECIALIST:

     

Origination Date:        10/02/98

Author's Initials:       WJR

Last Revised By:         lms/tlt/mm

Last Revision Date:      10-2;10-8

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