FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * ZEFF DANIEL   2. Issuer Name and Ticker or Trading Symbol ELECTRO SENSORS INC [ELSE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 50 CALIFORNIA STREET, SUITE 1500 3. Date of Earliest Transaction (Month/Day/Year) 10/14/2005 (Street) SAN FRANCISCO, CA 94111 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock (1) 10/14/2005   P   289 (2) A $ 3.91 176,954 I See Footnote (2) Common Stock (1) 10/14/2005   P   111 (2) A $ 3.93 177,065 I See Footnote (2) Common Stock (1) 10/14/2005   P   100 (2) A $ 3.98 177,165 I See Footnote (2) Common Stock (1) 10/14/2005   P   100 (2) A $ 3.99 177,265 I See Footnote (2) Common Stock (1) 10/14/2005   P   1,000 (2) A $ 4 178,265 I See Footnote (2) Common Stock (1)               216,506 I See Footnote (3)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
ZEFF DANIEL 50 CALIFORNIA STREET SUITE 1500 SAN FRANCISCO, CA 94111		X
Zeff Holding Company, LLC 50 CALIFORNIA STREET SUITE 1500 SAN FRANCISCO, CA 94111		X
Zeff Capital Partners I, L.P. 50 CALIFORNIA STREET SUITE 1500 SAN FRANCISCO, CA 94111		X

Signatures

/s/ Daniel Zeff		10/17/2005
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	This Form 4 is being filed by Daniel Zeff, Zeff Capital Partners I, L.P. ("Capital") and Zeff Holding Company, LLC ("Holding").
(2)	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.
(3)	These securities are held through Spectrum Galaxy Fund Ltd. ("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.

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