form-10ksba_033104
                     U.S. SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D. C. 20549

                                  FORM 10-KSB/A
                                 Amendment No. 1

                   ANNUAL REPORT UNDER SECTION 13 OR 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934
                    FOR THE FISCAL YEAR ENDED MARCH 31, 2004

Commission File Number 0-11740

                             MESA LABORATORIES, INC.
                      -------------------------------------
                 (Name of small business issuer in its charter)

            Colorado                                            84-0872291
            --------                                            -----------
(State or other jurisdiction of                              (I.R.S. Employer Identifica-
incorporation or organization)                                   tion Number)

   12100 West Sixth Avenue  Lakewood, Colorado                     80228
   -------------------------------------------                 ---------------
        (Address of principal executive offices)                 (Zip Code)

Issuer's telephone number:  (303) 987-8000

Securities registered under Section 12(g) of the Exchange Act:

                           Common Stock, No Par Value
                           --------------------------
                                (Title of Class)

Check  whether the issuer (1) filed all reports  required to be filed by Section
13 or 15 (d) of the  Exchange Act during the past 12 months (or for such shorter
period that the registrant was required to file such reports),  and (2) has been
subject to such filing requirements for the past 90 days.

                                             YES   X          NO
                                                 -----            ------

Check if disclosure  of delinquent  filers in response to Item 405 of Regulation
S-B is not contained in this form, and no disclosure  will be contained,  to the
best of registrant's  knowledge,  in definitive proxy or information  statements
incorporated  by reference in Part III of this Form 10-KSB/A or any amendment to
this Form 10-KSB/A. [X]

State issuer's revenues for its most recent fiscal year:  $9,125,848.

State the  aggregate  market value of the voting and  non-voting  equity held by
non-affiliates of the Registrant: As of May 31, 2004: $21,218,916*.

State the number of shares outstanding of each of the issuer's classes of common
equity, as of the latest practicable date: No Par Value Common Stock-- 3,068,241
shares as of May 31, 2004.

Documents incorporated by reference: none.

Transitional Small Business Disclosure Format: Yes       ;  No    X  .
                                                    -----       -----

*    The  aggregate  market value was  determined by  multiplying  the number of
     outstanding  shares  (excluding  those  shares held of record by  officers,
     directors and greater than five percent  shareholders)  by $9.77,  the last
     sales price of the Registrant's  common stock as of May 31, 2004, such date
     being within 60 days prior to the date of filing.


                                EXPLANATORY NOTE

This  Amendment  No. 1 on Form  10-KSB/A to our Annual Report on Form 10-KSB for
the fiscal year ended March 31, 2004,  originally  filed with the Securities and
Exchange  Commission  on June 29,  2004,  amends Item 7  (Independent  Auditor's
Report)  and Item 8A  (Controls  and  Procedures)  of our Annual  Report on Form
10-KSB.  This Form  10-KSB/A is filed in response to comments  received from the
Division of Corporate Finance of the Securities and Exchange Commission. Consent
of our  independent  auditors is attached to this Form  10-KSB/A as Exhibit (23)
(i) and  certifications  from our Chief  Executive  Officer and Chief  Financial
Officer required by Sections 302 and 906 of the  Sarbanes-Oxley  Act of 2002 are
attached to this Form 10-KSB/A as Exhibits 31.1, 31.2, 32.1 and 32.2.


ITEM 7.  FINANCIAL STATEMENTS.



            REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM



Board of Directors and Stockholders
Mesa Laboratories, Inc.
Lakewood, Colorado

We have audited the accompanying balance sheets of Mesa Laboratories, Inc. as of
March 31, 2004 and 2003,  and the related  statements  of income,  stockholders'
equity, and cash flows for the years then ended. These financial  statements are
the responsibility of the Company's management. Our responsibility is to express
an opinion on these financial statements based on our audits.

We conducted our audits in accordance  with the standards of the Public  Company
Accounting Oversight Board (United States). Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement.  An audit includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements.  An audit also includes assessing the accounting principles used and
significant  estimates  made by  management,  as well as evaluating  the overall
financial  statement  presentation.   We  believe  that  our  audits  provide  a
reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all material respects,  the financial position of Mesa Laboratories,  Inc. as of
March 31, 2004 and 2003,  and the results of its  operations  and its cash flows
for the years then ended,  in conformity with  accounting  principles  generally
accepted in the United States of America.

                                        /s/ Ehrhardt Keefe Steiner & Hottman PC
                                            Ehrhardt Keefe Steiner & Hottman PC
April 28, 2004
Denver, Colorado





ITEM 8A.  CONTROLS AND PROCEDURES.

     We maintain  disclosure controls and procedures (as defined in Exchange Act
Rules  13a-15(e)  and  15d-15(e))  that are designed to ensure that  information
required  to be  disclosed  by us in the  reports  we file or  submit  under the
Securities Exchange Act of 1934, as amended, is recorded, processed, summarized,
and reported,  within the time periods  specified in the Securities and Exchange
Commission's  rules  and  forms and that such  information  is  accumulated  and
communicated to our management,  including our principal executive and principal
financial officers,  or persons performing similar functions,  as appropriate to
allow  timely  decisions  regarding  required  disclosure.  Our Chief  Executive
Officer and Chief Financial  Officer  evaluated the  effectiveness of the design
and  operation of our  disclosure  controls and  procedures as of the end of the
period covered in this Annual Report of Form 10-KSB/A. Based on that evaluation,
our Chief  Executive  Officer and Chief  Financial  Officer  concluded  that our
disclosure controls and procedures were effective as of the end of such period.

     There  have  been  no  changes  in the  Company's  internal  controls  over
financial  reporting  during the  quarter  ended March 31,  2004  identified  in
connection  with the Company's  evaluation that has materially  affected,  or is
reasonably  likely to materially  affect,  the Company's  internal controls over
financial reporting.


SIGNATURES

In  accordance  with  Section 13 or 15(d) of the Exchange  Act,  the  registrant
caused this report to be signed on its behalf by the undersigned, thereunto duly
authorized.

                             MESA LABORATORIES, INC.
                          -----------------------------
                                   Registrant


Date: April 8, 2005                                 By:  /s/Luke R. Schmieder
      -------------                                      --------------------
                                                 Luke R. Schmieder, President

EXHIBITS INDEX
--------------


(23)(i) Consent of Ehrhardt Keefe Steiner & Hottman PC,  independent  registered
     public   accounting  firm,  to  the   incorporation  by  reference  in  the
     Registration  Statements  on Form S-8 (file  numbers  33-89808,  333-02074,
     333-18161,  333-48556 and 333-122911) of their report dated April 28, 2004,
     included in the  Registrant's  Report on Form  10-KSB/A for the fiscal year
     ended March 31, 2004.

(31.1) Certification of Chief Executive Officer Pursuant to Rule 13a-14(a).

(31.2) Certification of Chief Financial Officer Pursuant to Rule 13a-14(a).

(32.1) Certification  of Chief Executive  Officer Pursuant to Rule 13a-14(a) and
       18 U.S.C. Section 1350.

(32.2) Certification  of Chief Financial  Officer Pursuant to Rule 13a-14(a) and
        18 U.S.C. Section 1350.

EXHIBIT (23) (i)




             INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM CONSENT





We consent  to the  incorporation  by  reference  in the  Annual  Report on Form
10-KSB/A under the Securities  Exchange Act of 1934 of Mesa  Laboratories,  Inc.
for the year  ended  March 31,  2004 of our  reports  dated  April 28,  2004 and
contained  in  registration  Statements  NO.  33-89808,  333-02074,   333-18161,
333-48556  and  333-122911  of Mesa  Laboratories,  Inc.  on Form S-8  under the
Securities  Act of  1933  insofar  as  such  reports  relate  to  the  financial
statements of Mesa Laboratories, Inc. for the year ended March 31, 2004.





                                     /s/ Ehrhardt Keefe Steiner & Hottman PC
                                         Ehrhardt Keefe Steiner & Hottman PC

April 22, 2005
Denver, Colorado