<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2006-08-08</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000027082</issuerCik>
        <issuerName>DATAMETRICS CORP</issuerName>
        <issuerTradingSymbol>DMCP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001386798</rptOwnerCik>
            <rptOwnerName>Philip S. Sassower 1996 Charitable Remainder Annuity Trust</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>110 EAST 59TH STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1901</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000908269</rptOwnerCik>
            <rptOwnerName>SASSOWER PHILIP S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>110 EAST 59TH STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1901</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1588556</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The amounts shown in Table I as directly owned securities represent the beneficial ownership of the Issuer's securities by Philip S. Sassower 1996 Charitable Remainder Annuity Trust, a portion of which may be attributable to Philip S. Sassower as trustee of the Philip S. Sassower 1996 Charitable Remainder Annuity Trust.</footnote>
        <footnote id="F2">Philip S. Sassower is a trustee of the Philip S. Sassower 1996 Charitable Remainder Annuity Trust and is a beneficial owner of the Issuer's securities held by the Philip S. Sassower 1996 Charitable Remainder Annuity Trust.  Philip S. Sassower is also a managing member of SG Phoenix Ventures LLC, the managing member of SG DMTI Capital LLC; SG DMTI Capital LLC is the owner of 1,000,000 shares of Series B Preferred Stock, 174,887 shares of Common Stock and Warrants exercisable into 12,877,162 shares of Common Stock of the Issuer.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Philip S. Sassower 1996 Charitable Remainder Annuity Trust</signatureName>
        <signatureDate>2007-01-17</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Philip S. Sassower</signatureName>
        <signatureDate>2007-01-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
