-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 QdIrce+Nif/cjX6hCkUSalPbYhC3kxverjQgU+Ph/x0gVRQ96onilo/llnExBuG2
 P+/ekERYaMYycMHAZczP2g==

<SEC-DOCUMENT>0001140361-07-001056.txt : 20070111
<SEC-HEADER>0001140361-07-001056.hdr.sgml : 20070111
<ACCEPTANCE-DATETIME>20070111155357
ACCESSION NUMBER:		0001140361-07-001056
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070109
FILED AS OF DATE:		20070111
DATE AS OF CHANGE:		20070111

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SENTRY TECHNOLOGY CORP
		CENTRAL INDEX KEY:			0001030708
		STANDARD INDUSTRIAL CLASSIFICATION:	COMMUNICATIONS EQUIPMENT, NEC [3669]
		IRS NUMBER:				113349733
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1881 LAKELAND AVENUE
		CITY:			RONKONKOMA
		STATE:			NY
		ZIP:			11779
		BUSINESS PHONE:		6317392000

	MAIL ADDRESS:	
		STREET 1:		1881 LAKELAND AVENUE
		CITY:			RONKONKOMA
		STATE:			NY
		ZIP:			11779

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FURST ROBERT D JR
		CENTRAL INDEX KEY:			0001134256

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12727
		FILM NUMBER:		07525943

	BUSINESS ADDRESS:	
		STREET 1:		3900 WALDEN RD
		CITY:			DEEPHAVEN
		STATE:			MN
		ZIP:			55391
		BUSINESS PHONE:		952-847-2453

	MAIL ADDRESS:	
		STREET 1:		C/O ALTERNATIVE STRATEGY ADVISERS, LLC
		STREET 2:		601 CARLSON PARKWAY, SUITE 610
		CITY:			MINNETONKA
		STATE:			MN
		ZIP:			55305
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4/A
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2007-01-09</periodOfReport>

    <dateOfOriginalSubmission>2007-01-11</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001030708</issuerCik>
        <issuerName>SENTRY TECHNOLOGY CORP</issuerName>
        <issuerTradingSymbol>SKVY</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001134256</rptOwnerCik>
            <rptOwnerName>FURST ROBERT D JR</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ALTERNATIVE STRATEGY ADVISERS LLC</rptOwnerStreet1>
            <rptOwnerStreet2>601 CARLSON PARKWAY, SUITE 610</rptOwnerStreet2>
            <rptOwnerCity>MINNETONKA</rptOwnerCity>
            <rptOwnerState>MN</rptOwnerState>
            <rptOwnerZipCode>55305</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-01-09</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2007-01-09</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.052</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>16716714</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-01-10</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2007-01-10</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>40000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.054</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>16756714</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Robert D. Furst, Jr.</signatureName>
        <signatureDate>2007-01-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----