FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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

OMB APPROVAL OMB Number: 3235-0104 Expires: January 31, 2005 Estimated average burden hours per response... 0.5

(Print or Type Responses)

1. Name and Address of Reporting Person *   ZEFF DANIEL 2. Date of Event Requiring Statement (Month/Day/Year) 09/14/2005 3. Issuer Name and Ticker or Trading Symbol ELECTRO SENSORS INC [ELSE] (Last) (First) (Middle) 50 CALIFORNIA STREET, SUITE 1500 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) SAN FRANCISCO, CA 94111 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 Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock (1) 148,566 (2) I See Footnote (2) Common Stock (1) 187,055 (3) I See Footnote (3)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
	Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

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

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	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	Â	  X	Â	Â
Zeff Holding Company, LLC 50 CALIFORNIA STREET SUITE 1500 SAN FRANCISCO, CA 94111	Â	  X	Â	Â
Zeff Capital Partners I, L.P. 50 CALIFORNIA STREET SUITE 1500 SAN FRANCISCO, CA 94111	Â	  X	Â	Â
Spectrum Galaxy Fund Ltd. 50 CALIFORNIA STREET SUITE 1500 SAN FRANCISCO, CA 94111	Â	  X	Â	Â

Signatures

/s/ Daniel Zeff		09/16/2005
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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 3 is being filed by Daniel Zeff, Zeff Holding Company, LLC ("Holding"), Zeff Capital Partners I, L.P. ("Capital") and Spectrum Galaxy Fund Ltd. ("Spectrum").
(2)	This amount reflects the amount of securities held, as of the date indicated in Item 2 above, by 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 5(b)(iv) of Form 3, 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)	This amount reflects the amount of securities held, as of the date indicated in Item 2 above, by 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 5(b)(iv) of Form 3, 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.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.