-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 remwil3QC+5pIMx5QBmRPg==

<SEC-DOCUMENT>0001193805-05-001963.txt : 20050927
<SEC-HEADER>0001193805-05-001963.hdr.sgml : 20050927
<ACCEPTANCE-DATETIME>20050927152411
ACCESSION NUMBER:		0001193805-05-001963
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20050926
FILED AS OF DATE:		20050927
DATE AS OF CHANGE:		20050927

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ELECTRO SENSORS INC
		CENTRAL INDEX KEY:			0000351789
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL [3823]
		IRS NUMBER:				410943459
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		6111 BLUE CIRCLE DR
		CITY:			MINNETONKA
		STATE:			MN
		ZIP:			55343-9108
		BUSINESS PHONE:		9529300100

	MAIL ADDRESS:	
		STREET 1:		6111 BLUE CIRCLE DR
		CITY:			MINNETONKA
		STATE:			MN
		ZIP:			55343

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Spectrum Galaxy Fund Ltd.
		CENTRAL INDEX KEY:			0001313253

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-09587
		FILM NUMBER:		051105282

	BUSINESS ADDRESS:	
		STREET 1:		9 COLUMBUS CENTER
		STREET 2:		PELICAN DRIVE
		CITY:			ROAD TOWN, TORTOLA
		STATE:			D8
		ZIP:			D8
		BUSINESS PHONE:		415-439-5273

	MAIL ADDRESS:	
		STREET 1:		50 CALIFORNIA STREET
		STREET 2:		SUITE 1500
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Zeff Capital Partners I, L.P.
		CENTRAL INDEX KEY:			0001311996
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-09587
		FILM NUMBER:		051105283

	BUSINESS ADDRESS:	
		STREET 1:		C/O ZEFF HOLDING COMPANY, LLC
		STREET 2:		50 CALIFORNIA STREET
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111
		BUSINESS PHONE:		(415) 439-5273

	MAIL ADDRESS:	
		STREET 1:		C/O ZEFF HOLDING COMPANY, LLC
		STREET 2:		50 CALIFORNIA STREET
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Zeff Holding Company, LLC
		CENTRAL INDEX KEY:			0001311997

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-09587
		FILM NUMBER:		051105284

	BUSINESS ADDRESS:	
		STREET 1:		50 CALIFORNIA STREET
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111
		BUSINESS PHONE:		(415) 439-5273

	MAIL ADDRESS:	
		STREET 1:		50 CALIFORNIA STREET
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ZEFF DANIEL
		CENTRAL INDEX KEY:			0001271640

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-09587
		FILM NUMBER:		051105285

	BUSINESS ADDRESS:	
		STREET 1:		50 CALIFORNIA STREET
		STREET 2:		SUITE 1500
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111
		BUSINESS PHONE:		4154395273
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>e501013_ex.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-09-26</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000351789</issuerCik>
        <issuerName>ELECTRO SENSORS INC</issuerName>
        <issuerTradingSymbol>ELSE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001271640</rptOwnerCik>
            <rptOwnerName>ZEFF DANIEL</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>50 CALIFORNIA STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1500</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001311997</rptOwnerCik>
            <rptOwnerName>Zeff Holding Company, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>50 CALIFORNIA STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1500</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001311996</rptOwnerCik>
            <rptOwnerName>Zeff Capital Partners I, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>50 CALIFORNIA STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1500</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001313253</rptOwnerCik>
            <rptOwnerName>Spectrum Galaxy Fund Ltd.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>50 CALIFORNIA STREET</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1500</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2005-09-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>569</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>4.20</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>213307</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2005-09-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>431</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>4.20</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>167068</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">This Form 4 is being filed by Daniel Zeff, Spectrum Galaxy Fund Ltd. (&quot;Spectrum&quot;), Zeff Capital Partners I, L.P. (&quot;Capital&quot;)
 and Zeff Holding Company, LLC (&quot;Holding&quot;).</footnote>
        <footnote id="F2">This transaction was effected through Spectrum.  Mr. Zeff provides discretionary investment management services to Zeff
 Capital Offshore Fund, a class of shares of Spectrum, a company incorporated in the British Virgin Islands.  In accordance
 with Instruction 4(b)(iv) of Form 4, the entire amount of the Issuer's securities held by Spectrum is reported herein.  Mr.
 Zeff disclaims, for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership of such securities,
 except to the extent of his indirect pecuniary interest therein, and this report shall not be deemed an admission that Mr.
 Zeff is the beneficial owner of such securities for purposes of Section 16 or for any other purposes.  Each of Holding and
 Capital disclaims beneficial ownership over all shares held by Spectrum.</footnote>
        <footnote id="F3">This transaction was effected through Capital.  Mr. Zeff is the sole manager and member of Holding, which in turn serves as
 the general partner for Capital.  In accordance with Instruction 4(b)(iv) of Form 4, the entire amount of the Issuer's
 securities held by Capital is reported herein.  Each of Mr. Zeff and Holding disclaims, for purposes of Section 16 of the
 Securities Exchange Act of 1934, beneficial ownership of such securities, except to the extent of its/his indirect pecuniary
 interest therein, and this report shall not be deemed an admission that any of Mr. Zeff or Holding is the beneficial owner
 of such securities for purposes of Section 16 or for any other purposes.  Spectrum disclaims beneficial ownership over all
 shares held through Capital.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Daniel Zeff</signatureName>
        <signatureDate>2005-09-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>e501013_ex99-1.txt
<DESCRIPTION>INFORMATION REGARDING JOINT FILERS
<TEXT>

                                                                      Exhibit 99

                       Information Regarding Joint Filers

Designated Filer of Form 4:        Daniel Zeff

Date of Event Requiring Statement: September 26, 2005

Issuer Name and Ticker Symbol:     Electro-Sensors, Inc. (ELSE)

Names:   Zeff Holding Company, LLC, Zeff Capital Partners I, L.P. and Spectrum
         Galaxy Fund Ltd.

Address: 50 California Street
         Suite 1500
         San Francisco, CA 94111

Signatures:

The undersigned, Zeff Holding Company, LLC, Zeff Capital Partners I, L.P. and
Spectrum Galaxy Fund Ltd., are jointly filing the attached Statement of Changes
in Beneficial Ownership of Securities on Form 4 with Daniel Zeff with respect to
the beneficial ownership of securities of Electro-Sensors, Inc.

ZEFF HOLDING COMPANY, LLC            ZEFF CAPITAL PARTNERS I, L.P

                                     By: Zeff Holding Company, LLC, as general
                                         partner


By: /s/ Daniel Zeff                      By: /s/ Daniel Zeff
    ----------------------------             -------------------------------
Name: Daniel Zeff                            Name: Daniel Zeff
Title: Manager                               Title: Manager

SPECTRUM GALAXY FUND LTD.


By: /s/ Dion R. Friedland
    ----------------------------
Name: Dion R. Friedland
Title: Director
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
