POWER OF ATTORNEY





 The undersigned hereby constitutes and appoints Bradley D. Slye

("Attorney-in-Fact"), the undersigned's true and lawful attorney-in-fact

and agent with full power of substitution and resubstitution, for the

undersigned and in the undersigned's name, place and stead, in any and

all capacities, to sign any or all Forms 3, 4 or Forms 5 relating to

beneficial ownership of securities of Electro Sensors, Inc. (the

"Issuer"), to file the same, with all exhibits thereto and other

documents in connection therewith, with the Securities and Exchange

Commission and to deliver a copy of the same to the Issuer, granting unto

said attorney-in-fact and agent full power and authority to do and

perform each and every act and thing requisite and necessary to be done

in and about the premises, as fully to all intents and purposes as the

undersigned might or could do in person, hereby ratifying and confirming

all said attorney-in-fact and agent, or his or her substitute or

substitutes, may lawfully do or cause to be done by virtue thereof.  The

undersigned acknowledges that the foregoing attorney-in-fact, in serving

in such capacity at the request of the undersigned, is not assuming any

of the undersigned's responsibilities to comply with Section 16 of the

Securities Exchange Act of 1934.





 This Power of Attorney shall remain in effect until such time as

the undersigned is no longer subject to the provisions of Section 16 of

the Securities Exchange Act of 1934 with respect to securities of the

Issuer or until this Power of Attorney is replaced by a later dated Power

of Attorney or revoked by the undersigned in writing.





 The undersigned hereby indemnifies the Attorneys-in-Fact for all

losses and costs the Attorneys-in-Fact may incur in connection with or

arising from the Attorneys-in-Fact's execution of their authorities

granted hereunder.





 IN WITNESS WHEREOF, the undersigned has caused this Power of

Attorney to be executed as of this 2nd day of August, 2012.





     /s/ Joseph A. Marino