-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 MvCng3TkH5JVpBFy+JtzseNPqLWe9cLWyyb5hd+mfLbyjPi3XGITD86kJ+y9fEPM
 PypFJASpGw+g94eqIk7+9g==

<SEC-DOCUMENT>0001351137-06-000003.txt : 20060310
<SEC-HEADER>0001351137-06-000003.hdr.sgml : 20060310
<ACCEPTANCE-DATETIME>20060310141724
ACCESSION NUMBER:		0001351137-06-000003
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060228
FILED AS OF DATE:		20060310
DATE AS OF CHANGE:		20060310

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ENVIRONMENTAL TECTONICS CORP
		CENTRAL INDEX KEY:			0000033113
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
		IRS NUMBER:				231714256
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			0225

	BUSINESS ADDRESS:	
		STREET 1:		COUNTY LINE INDUSTRIAL PARK
		CITY:			SOUTHAMPTON
		STATE:			PA
		ZIP:			18966
		BUSINESS PHONE:		2153559100

	MAIL ADDRESS:	
		STREET 1:		COUNTYLINE INDUSTRIAL PARK
		CITY:			SOUTHAMPTON
		STATE:			PA
		ZIP:			18966

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ENVIRONMENTAL TECHNOLOGY CORP
		DATE OF NAME CHANGE:	19730208

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Gemmill Alan Mark
		CENTRAL INDEX KEY:			0001351137

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-10655
		FILM NUMBER:		06678786

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		703-307-4835

	MAIL ADDRESS:	
		STREET 1:		941 UPPER HASTINGS WAY
		CITY:			VIRGINIA BEACH
		STATE:			VA
		ZIP:			23452
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2006-02-28</periodOfReport>

    <dateOfOriginalSubmission>2006-03-02</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000033113</issuerCik>
        <issuerName>ENVIRONMENTAL TECTONICS CORP</issuerName>
        <issuerTradingSymbol>ETC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001351137</rptOwnerCik>
            <rptOwnerName>Gemmill Alan Mark</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>941 UPPER HASTINGS WAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>VIRGINIA BEACH</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>23452</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Option to Purchase</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>5.12</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2006-02-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2006-02-28</value>
            </exerciseDate>
            <expirationDate>
                <value>2016-02-28</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <ownerSignature>
        <signatureName>Alan Mark Gemmill</signatureName>
        <signatureDate>2006-03-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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