EXHIBIT 31.1

# CERTIFICATION PURSUANT TO
SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Bradley D. Slye, Chief Executive Officer and Chief Financial Officer of
Electro-Sensors, Inc., certify that:

| | 1. |  | I have reviewed this report on Form 10-QSB of Electro-Sensors Inc.
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| | 2. |  | Based on my knowledge, this report does not contain any untrue
statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances
under which such statements were made, not misleading with respect to the period covered by this report;
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| | 3. |  | Based on my knowledge, the financial statements, and other
financial information included in this report, fairly present in all material respects the financial condition, results of
operations and cash flows of the small business issuer as of, and for, the periods presented in this report;
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| | 4. |  | The small business issuers other certifying officers and I
are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e)
and 15d-15(e)) for the small business issuer and have:
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| | (a)    Designed such disclosure controls and
procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material
information relating to the small business issuer, including its consolidated subsidiaries, is made known to us by others within
those entities, particularly during the period in which this report is being prepared;
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| | (b)    Evaluated the effectiveness of the
small business issuers disclosure controls and procedures and presented in this report our conclusions about the
effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such
evaluation; and
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| | (c)    Disclosed in this report any change in
the small business issuers internal control over financial reporting that occurred during the small business issuers
most recent fiscal quarter (the small business issuers fourth fiscal quarter in the case of an annual report) that has
materially affected, or is reasonably likely to materially affect, the small business issuers internal control over
financial reporting; and
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| | 5. |  | The small business issuers other certifying officers and I
have disclosed, based on our most recent evaluation of internal control over financial reporting, to the small business
issuers auditors and the audit committee of the small business issuers board of directors (or persons performing the
equivalent functions):
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| | (a)    All significant deficiencies and
material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to
adversely affect the small business issuers ability to record, process, summarize and report financial information; and
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| | (b)    Any fraud, whether or not material,
that involves management or other employees who have a significant role in the small business issuers internal control over
financial reporting.
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|August 5, 2005
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