EXHIBIT 31.1

# CERTIFICATION PURSUANT
TOSECTION 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-KSB/A of Electro-Sensors Inc.
| | -- |  | --------------------------------------------------------------------

| | 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;
| | -- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | 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;
| | -- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | 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:
| | -- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| |  | (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;
| |  | --- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| |  | (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
| |  | --- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| |  | (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
| |  | --- |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | 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):
| | -- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| |  | (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
| |  | --- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| |  | (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.
| |  | --- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | October 24, 2005                                    | By: | /s/ Bradley D. Slye
| | --------------------------------------------------- | --- | -------------------
| | Bradley D. Slye                                    
| | Chief Executive Officer and Chief Financial Officer
|

---