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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                   ----------

                                  FORM 10-QSB/A

    [X] AMENDMENT NO. 1 TO QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE
        SECURITIES EXCHANGE ACT OF 1934

                  For the quarterly period ended March 31, 2005

    [ ] TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE EXCHANGE ACT

             For the transition period from __________ to __________

                        Commission file number 333-87224

                       ELECTRONIC SENSOR TECHNOLOGY, INC.
        (Exact Name of Small Business Issuer as Specified in Its Charter)

                 NEVADA                                98-0372780
     (State or Other Jurisdiction of      (I.R.S. Employer Identification No.)
     Incorporation or Organization)

                           1077 Business Center Drive
                         Newbury Park, California 91320
                    (Address of Principal Executive Offices)

                                 (805) 480-1994
                (Issuer's Telephone Number, Including Area Code)

     Check whether the issuer (1) filed all reports required to be filed by
Section 13 or 15(d) of the Securities 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 [ ]  No [X](*)

----------
* We were not required to file reports pursuant to Section 13 or 15(d) of the
Securities Exchange Act during the past 12 months because (i) our registered
common stock was registered under the Securities Act during such period and was
not registered under the Exchange Act, (ii) we did not have any registration
statement that became effective during such period and (iii) we had less than
300 shareholders of record throughout such period. Although we were not required
to do so, we voluntarily filed such reports with the Securities and Exchange
Commission during such period. On March 24, 2006 we filed a registration
statement on Form 10-SB to register our common stock pursuant to the Exchange
Act, which we subsequently withdrew pursuant to the request of the Securities
and Exchange Commission until our registration statement on Form SB-2, for which
an amendment was last filed on May 1, 2006, is declared effective. Once our
registration statement on Form SB-2 is declared effective, we plan to file
another registration statement on Form 10-SB to register our common stock
pursuant to the Exchange Act. Once our registration statement on Form 10-SB is
effective, we will be subject to the filing requirements of the Securities
Exchange Act.


     Indicate by check mark whether the registrant is a shell company (as
defined in Rule 12b-2 of the Exchange Act). Yes [ ] No [X]

     State the number of shares outstanding of each of the issuer's classes of
common equity, as of the latest practicable date. 54,173,745 shares of common
stock as of September 7, 2006

     Transitional Small Business Disclosure Format  Yes [ ] No [X]



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                                EXPLANATORY NOTE

     We are filing this amended quarterly report on Form 10-QSB/A for the three
months ended March 31, 2005 to restate our unaudited consolidated financial
statements at March 31, 2005 and for the period ended March 31, 2005 in order
to: (i) properly account for the fair value of derivative liabilities resulting
from the issuance of freestanding warrants and registration rights granted in
connection with the issuance of such warrants (the effect of this restatement is
described further in Note 3 to the Consolidated Financial Statements included
herein), (ii) correct the classification of a certificate of deposit maintained
by us with East West Bank as unrestricted and properly classify such certificate
of deposit as a restricted asset, and (iii) properly account for the receipt of
a one-time licensing fee for which the amount received is classified as deferred
revenue and amortized to earned revenue over the five (5) year life of the
agreement (the effect of this restatement is described further in Note 7 to the
Consolidated Financial Statements included herein). We have also amended the
cover page in order to correct and clarify certain disclosures contained
therein.

     The following Items of this amended quarterly report on Form 10-QSB/A for
the three months ended March 31, 2005 are amended and restated herein:

     Cover Page:

     o    Disclosure relating to the registration of our common stock under the
          Securities Exchange Act has been removed and corrected to reflect that
          we did not have any equity securities registered under the Exchange
          Act as of March 31, 2005, nor were we subject to the filing
          requirements of Section 13 or 15(d) of the Securities Exchange Act as
          of such date.

     Part I Financial Information:

     o    Item 1. Financial Statements--Consolidated Balance Sheet as of March
          31, 2005 (unaudited), Consolidated Statements of Operations for the
          Three Months Ended March 31, 2005 and March 31, 2004 (unaudited),
          Consolidated Statements of Cash Flows for the Three Months Ended March
          31, 2005 and March 31, 2004 (unaudited) and Notes to Consolidated
          Financial Statements as of March 31, 2005 (unaudited);

     o    Item 2. Management Discussion and Analysis of Operations or Plan of
          Operations (excluding Risk Factors); and

     o    Item 3. Controls and Procedures.

     Part II Other Information:

     o    Item 6. Exhibits--Exhibits 31.1, 31.2, 32.1 and 32.2--currently-dated
          certifications from our President and Chief Executive Officer and
          Treasurer and Vice President of Finance and Administration, as
          required by Section 302 and 906 of the Sarbanes-Oxley Act of 2002.

     The remaining Items are unaffected by the correction in classification,
have not been updated from the disclosure originally contained in our quarterly
report on Form 10-QSB for the three months ended March 31, 2005 filed with the
Securities and Exchange Commission on May 23, 2005 and are not reproduced in
this Form 10-QSB/A. This amended quarterly report on Form 10-QSB/A for the three
months ended March 31, 2005 does not reflect events occurring after the filing
of the quarterly report on Form 10-QSB filed with the Commission on May 23,
2005, nor does it modify or update the disclosures contained in the quarterly
report on Form 10-QSB filed with the Commission on May 23, 2005, other than as
described above and to correct typographical errors contained therein.

                                        1


                          PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

                       ELECTRONIC SENSOR TECHNOLOGY, INC.

                           CONSOLIDATED BALANCE SHEET

                                 MARCH 31, 2005
                                   (Restated)
                                   (Unaudited)


                                                                    
                                     ASSETS
CURRENT ASSETS:
  Cash and cash equivalents                                            $     1,879,647
  Certificate of deposit-restricted                                            900,651
  Accounts receivable, net of allowance for doubtful accounts                  137,036
  Prepaid expenses                                                              21,582
  Inventories                                                                  473,436
                                                                       ---------------
     TOTAL CURRENT ASSETS                                                    3,412,352

PROPERTY AND EQUIPMENT, net of accumulated depreciation of $897,555             88,334

SECURITY DEPOSITS                                                               12,817
                                                                       ---------------
                                                                       $     3,513,503
                                                                       ===============

                      LIABILITIES AND STOCKHOLDERS' DEFICIT
CURRENT LIABILITIES:
  Line of credit borrowings                                            $     1,769,137
  Accounts payable and accrued expenses                                        335,101
  Interest payable                                                              21,417
  Derivative liabilities                                                     5,897,800
  Deferred revenues                                                            179,167
  Other current liabilities                                                     34,650
                                                                       ---------------
     TOTAL CURRENT LIABILITIES                                               8,237,272

STOCKHOLDERS' DEFICIT:
  Preferred stock, $.001 par value 50,000,000 shares authorized
   none issued and outstanding                                                      -
  Common stock, $.001 par value, 200,000,000
   shares authorized, 53,968,643 issued and outstanding                         53,969
  Additional paid-in capital                                                 8,420,609
  Accumulated deficit                                                      (13,198,347)
                                                                       ---------------
     TOTAL STOCKHOLDERS' DEFICIT                                            (4,723,769)
                                                                       ---------------
                                                                       $     3,513,503
                                                                       ===============


            See unaudited notes consolidated to financial statements

                                        2


                       ELECTRONIC SENSOR TECHNOLOGY, INC.

                      CONSOLIDATED STATEMENTS OF OPERATIONS

                                   (Unaudited)



                                                               Three Months Ended
                                                                    March 31,
                                                       ----------------------------------
                                                            2005               2004
                                                       ---------------    ---------------
                                                         (Restated)         (Restated)
                                                                    
REVENUES                                               $       219,511    $       326,083

COST OF SALES                                                  290,134            244,341
                                                       ---------------    ---------------
GROSS PROFIT                                                   (70,623)            81,742

OPERATING EXPENSES:
Compensation                                                    59,093             66,599
Selling                                                         39,210              8,314
General and administrative                                     469,647             83,346
                                                       ---------------    ---------------
TOTAL OPERATING EXPENSES                                       567,950            158,259
                                                       ---------------    ---------------

LOSS FROM OPERATIONS                                          (638,573)           (76,517)

OTHER INCOME AND EXPENSE:
Other expense                                                     (239)           (24,834)
Other income - Derivatives                                     119,550                  -
Other expense - Derivatives                                 (2,205,642)                 -
Gain (loss) on sale of property and equipment                   13,257             (7,711)
Interest expense                                               (20,566)           (16,370)
                                                       ---------------    ---------------
TOTAL OTHER INCOME AND EXPENSE                              (2,093,640)           (48,915)
                                                       ---------------    ---------------
NET INCOME (LOSS)                                      $    (2,732,214)   $      (125,432)
                                                       ===============    ===============
Earnings (loss) per share, basic and diluted           $         (0.05)   $         (0.00)
                                                       ===============    ===============
Weighted average number of shares, basic and diluted        52,640,310         49,983,643
                                                       ===============    ===============


            See unaudited notes to consolidated financial statements

                                        3


                       ELECTRONIC SENSOR TECHNOLOGY, INC.
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (Unaudited)



                                                                          Three Months Ended
                                                                               March 31,
                                                                   --------------------------------
                                                                        2005              2004
                                                                   --------------    --------------
                                                                     (Restated)        (Restated)
                                                                               
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income (loss)                                                $   (2,732,214)   $     (125,432)
  Adjustments to reconcile net income (loss) to net
   cash provided by (used in) operating activities:
    Depreciation and amortization                                           1,845               863
    Fair value of derivatives at date of issuance                       2,205,642                 -
    Decrease in fair value of derivative liability                       (119,550)                -
    Donated services                                                            -             6,000
  Changes in assets and liabilities:
    Accounts receivable                                                  (106,349)          221,811
    Inventories                                                             7,212           (44,528)
    Prepaid expenses                                                       (7,324)           (3,644)
    Security deposits                                                         140                 -
    Accounts payable and accrued expenses                                 120,797           (36,080)
    Deferred revenues                                                     (12,500)          229,167
    Due to related party                                                  (60,000)           45,500
    Interest payable                                                       (5,544)           (5,534)
    Other current liabilities                                              (1,016)           (1,515)
                                                                   --------------    --------------
  Net cash provided by (used in) operating activities                    (708,861)          286,608
CASH FLOWS FROM INVESTING ACTIVITIES:
  Proceeds from sale of property and equipment                             16,064             9,716
  Investment in restricted security deposit                              (900,651)                -
  Purchase of property and equipment                                      (55,044)                -
                                                                   --------------    --------------
  Net cash provided by (used in) investing activities                    (939,631)            9,716
                                                                   --------------    --------------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Decrease in line of credit                                             (200,000)         (205,000)
  Repayment of partners' loans payable                                   (110,000)         (230,000)
  Proceeds from issuance of common stock                                3,811,708            62,500
                                                                   --------------    --------------
  Net cash provided by financing activities                             3,501,708          (372,500)
                                                                   --------------    --------------
NET INCREASE (DECREASE) IN CASH                                         1,853,217           (76,176)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD                           26,430           121,069
                                                                   --------------    --------------
CASH AND CASH EQUIVALENTS AT END OF PERIOD                         $    1,879,647    $       44,893
                                                                   ==============    ==============

SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
  Cash paid during the period for:
    Interest                                                       $       21,217    $       16,412
                                                                   ==============    ==============
NON-CASH FINANCING ACTIVITIES
  Fair value of derivative liabilities issued in connection with
   issuance of Shares of common stock                              $    5,897,800    $            -
                                                                   ==============    ==============


            See unaudited notes to consolidated financial statements.

                                        4


                       ELECTRONIC SENSOR TECHNOLOGY, INC.
                          Notes to Financial Statements
                                   (Unaudited)
                                 MARCH 31, 2005

(1)  BASIS OF PRESENTATION

     The accompanying unaudited consolidated financial statements have been
     prepared in accordance with generally accepted accounting principles for
     interim financial statements and with the instructions to Form 10-QSB and
     Article 10 of Regulation S-B. Accordingly, they do not include all the
     information and disclosures required for annual financial statements. These
     financial statements should be read in conjunction with the consolidated
     financial statements and related footnotes thereto for the year ended
     December 31, 2004, included in the current report filed on Form 8-K with
     the Securities and Exchange Commission on April 19, 2005.

     In the opinion of the management of Electronic Sensor Technology, Inc.
     (formerly Bluestone Ventures Inc.) (the "Company"), all adjustments
     (consisting of normal recurring accruals) necessary to present fairly the
     Company's financial position as of March 31, 2005, and the results of
     operations and cash flows for the three month period ending March 31, 2005
     have been included. The results of operations for the three- month period
     ended March 31, 2005 are not necessarily indicative of the results to be
     expected for the full year. For further information, refer to the
     consolidated financial statements and related footnotes thereto for the
     year ended December 31, 2004, included in the current report filed on Form
     8-K with the Securities and Exchange Commission on April 19, 2005.

(2)  BASIS OF CONSOLIDATION

     The accompanying financial statements include the accounts of the Company
     and its wholly owned subsidiaries. All intercompany balances and
     transactions have been eliminated in consolidation.

(3)  NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     (a)  NATURE OF BUSINESS

          The Company develops and manufactures electronic devices used for
          vapor analysis.

     (b)  CASH AND CASH EQUIVALENTS

          The Company considers highly liquid financial instruments with
          maturities of three months or less at the time of purchase to be cash
          equivalents. The Company did not have any cash equivalents at
          March 31, 2005.

     (c)  REVENUE RECOGNITION

          The Company records revenue from direct sales of products to end-users
          when the products are shipped, collection of the purchase price is
          probable and the Company has no significant further obligations to the
          customer. Costs of remaining insignificant Company obligations, if
          any, are accrued as costs of revenue at the time of revenue
          recognition. Cash payments received in advance of product or service
          revenue are recorded as deferred revenue.

     (d)  SHIPPING AND HANDLING

          The Company accounts for shipping and handling costs as a component of
          "Cost of Sales".

                                        5


     (e)  PROPERTY AND EQUIPMENT

          Property and equipment are stated at cost, net of accumulated
          depreciation. Depreciation is computed using the straight-line method
          over the estimated useful lives of five years.

     (f)  INVENTORIES

          Inventories are comprised of raw materials, work in process, and
          finished goods. Inventories are stated at the lower of cost or market
          and are determined using the first-in, first-out method.

     (g)  USE OF ESTIMATES

          The preparation of the financial statements in conformity with
          generally accepted accounting principles requires management to make
          estimates and assumptions that affect the reported amounts of assets
          and liabilities and disclosures of contingent assets and liabilities
          at the date of the financial statements and the recorded amounts of
          revenues and expenses during the reporting period. Actual results
          could differ from those estimates.

     (h)  FAIR VALUE OF FINANCIAL INSTRUMENTS

          The fair value of certain financial instruments, including accounts
          receivable, accounts payable and accrued liabilities, approximates
          their carrying value due to the short maturity of these instruments.

     (i)  LONG-LIVED ASSETS

          The Company reviews long-lived assets, such as property and equipment,
          to be held and used or disposed of, for impairment whenever events or
          changes in circumstances indicate that the carrying amount of an asset
          may not be recoverable. If the sum of the expected cash flows,
          undiscounted and without interest, is less than the carrying amount of
          the asset, an impairment loss is recognized as the amount by which the
          carrying amount of the asset exceeds its fair value. At March 31, 2005
          no assets were impaired.

     (j)  DERIVATIVE LIABILITIES

          The Company accounts for liquidated damages granted pursuant to
          registration rights which are not included in a separate registration
          right agreement as a combined unit with the warrants which are
          contemporaneously issued with the registration rights pursuant to SFAS
          133 "Accounting for Derivative and Hedging Activities" and EITF 00-19.

          The Company accounts for its embedded conversion features and
          freestanding warrants pursuant to SFAS No. 133, "Accounting for
          Derivative Instruments and Hedging Activities", which requires a
          periodic valuation of their fair value and a corresponding recognition
          of liabilities associated with such derivatives. The recognition of
          derivative liabilities related to the issuance of shares of common
          stock is applied first to the proceeds of such issuance, at the date
          of issuance, and the excess of derivative liabilities over the
          proceeds is recognized as other expense in the accompanying
          consolidated financial

                                        6


          statements. Any subsequent increase or decrease in the fair value of
          the derivative liabilities, which are measured at the balance sheet
          date, are recognized as other expense or other income, respectively.


     (k)  Basic and Diluted Earnings Per Share

          Basic earnings per share are calculated by dividing income available
          to stockholders by the weighted-average number of common shares
          outstanding during each period. Diluted earnings per share are
          computed using the weighted average number of common and dilutive
          common share equivalents outstanding during the period. Dilutive
          common share equivalents consist of shares issuable upon the exercise
          of stock options and warrants embedded conversion features (calculated
          using the reverse treasury stock method). The outstanding options,
          warrants and shares equivalent issuable pursuant to embedded
          conversion features amounted to 5,576,871 and 0 at March 31, 2005 and
          2004, respectively. The outstanding options, warrants and shares
          equivalent issuable pursuant to embedded conversion features and
          warrants at March 31, 2005 are excluded from the loss per share
          computation for that period due to their anti-dilutive effect. The
          Company adjusted the numerator for any changes in income or loss that
          would result if the contract had been recorded as an equity instrument
          for accounting purposes during the period. However, the Company did
          not adjust the numerator for interest charges during the period on the
          convertible debentures because it would have been anti-dilutive.

          The following sets forth the computation of basic and diluted earnings
          per share at March 31:



                                                                    2005              2004
                                                               --------------    --------------
                                                                  (Restated)        (Restated)
                                                                           
          Numerator:
           Net income (loss)                                   $   (2,732,214)   $     (125,432)
           Net other income/expense associated with
            derivative contracts                                    2,086,092                 -
                                                               --------------    --------------
            Net income (loss) for diluted earnings per share
             purposes                                          $     (646,122)   $     (125,432)
                                                               ==============    ==============
          Denominator:
            Denominator for basic earnings per share-
             Weighted average shares outstanding                   52,640,310        49,983,643
            Effect of dilutive warrants, embedded
             conversion features and liquidated damages                     -                 -
                                                               --------------    --------------
            Denominator for diluted earnings per share-
             Weighted average shares outstanding                   52,640,310        49,983,643
                                                               ==============    ==============

          Basic earnings (loss) per share                      $        (0.05)   $        (0.00)
                                                               ==============    ==============
          Diluted earnings (loss) per share                    $        (0.05)   $        (0.00)
                                                               ==============    ==============


(4)  MERGERS AND ACQUISITIONS

     Bluestone Ventures, Inc. ("Bluestone") executed an Agreement and Plan of
     Merger ("Merger Agreement") by and among Bluestone, Amerasia Technology,
     Inc., ("Amerasia"), holder of approximately 55% of the partnership
     interests of Electronic Sensor Technology, L.P., ("EST"), L & G Sensor
     Technology, L.P., ("L&G"), holder of approximately 45% of the partnership
     interests of EST, Amerasia Acquisition Corp., ("AAC") a wholly-owned
     subsidiary of Bluestone, and L & G Acquisition Corp., ("LAC") a wholly
     owned subsidiary of Bluestone on January 31, 2005. Under the Merger
     Agreement (i) AAC merged with and into Amerasia such that Amerasia became a
     wholly-owned subsidiary of Bluestone, (ii) LAC merged with and into L&G
     such that L&G became a wholly-owned subsidiary of Bluestone, (iii) as a
     result of the merger of (i) and (ii), Bluestone indirectly acquired all of
     the partnership interests of EST and (iv) Bluestone issued 20,000,000
     shares of its common stock to the shareholders of Amerasia and L&G. This
     merger has been treated as a purchase only of the partnership interests of
     Electronic Sensor Technology L.P.

     For accounting purposes, the transaction will be treated as a
     recapitalization of EST and accounted for as a reverse acquisition.

     Bluestone also entered into various Subscription Agreements with certain
     investors on January 31, 2005. Under these Subscription Agreements,
     Bluestone issued 3,985,000 shares of its common stock ("shares") and
     warrants to purchase 3,985,000 shares at $1.00 per share to certain
     investors for gross proceeds of $3,985,000. Bluestone received the gross
     proceeds of the sale of these shares on February 1, 2005. Bluestone
     received net proceeds of approximately $3,822,000. This amount was net of
     legal fees, including counsel fees for the investors and EST of
     approximately $163,000.

     By virtue of the Mergers, all shares of common stock of Amerasia were
     converted into the right to receive shares of common stock of Bluestone at
     an exchange ratio of 4.6223537 shares of Bluestone common stock for each
     share of Amerasia common stock and all shares of common stock L&G were
     converted into the right to receive shares of common stock of Bluestone at
     an exchange ratio of 90 shares of Bluestone common stock for each share of
     L&G common stock. In addition, all 200,000 Class C limited partnership
     units of Electronic Sensor Technology L.P. were automatically converted
     into 200,000 shares of Bluestone common stock.

     The purchase price for the Mergers was 20,000,000 shares of Bluestone
     common stock. The closing of the mergers occurred on February 1, 2005 (the
     "Closing Date").

     In January 2005 the loans payable to three partners of Electronic Sensor
     Technology L.P., totaling $1,198,630 were converted into 1,198,630 shares
     of common stock of Bluestone.

     In January 2005 the notes payable to related parties of $1,272,000 plus
     accrued interest were converted into 1,585,111 shares of common stock of
     Bluestone. Bluestone has changed its name to Electronic Sensor Technology,
     Inc. as of February 2005.

     The Company adopted a Stock Incentive Option Plan in April 2005. There were
     969,500 initial options granted to former EST limited partnership
     employees.

(5)  DERIVATIVE LIABILITIES

     During February 2005, we recognized derivative liabilities of approximately
     $6.0 million pursuant to the issuance of 3,985,000 freestanding warrants
     and granting certain registration rights which provided for liquidated
     damages in the event of failure to timely register the shares in connection
     with the issuance of shares of common stock and the related warrants.

                                        7


     There are no liquidated damages provided for untimely effectiveness of the
     registration of shares pursuant to piggy-back registration rights. The
     Company intends to register all shares and warrants pursuant to the
     subscriber piggy-back registration rights.

     The agreement pursuant to which the warrants were issued and the
     registration rights were granted provided for liquidated damages pursuant
     to demand registration rights in the event of a failure to timely register
     the shares after demand is made by the holders of a majority of the
     warrants and shares of common stock issued pursuant to such agreement. The
     demand registration rights of these investors are such that if the Company
     fails to register the investors shares, including the shares underlying the
     warrants, the Company will pay a cash penalty amounting to 1% of the amount
     invested per month, $39,850, if the registration statement is not filed
     within 60 days of demand or is not declared effective within 150 days from
     the date of initial filing. The maximum liability associated with the
     liquidated damages amounts to 49% of the gross proceeds associated with the
     issuance of shares of common stock, which amounts to $1,952,650. The
     percentage of liquidated damages amounts to the difference between 60
     months, which is the inherent time limitation under which the underlying
     shares would be free-trading (three year term and two year holding period)
     and 11 months, which is the grace period for registering the shares (no
     demand permitted for four months, two-month period to file and five-month
     period to become effective), times the penalty percentage, which is 1%. The
     Company believes that the likelihood that it will incur any liabilities
     resulting from the liquidated damages pursuant to the demand registration
     rights is remote considering that it will register the shares and the
     shares underlying the warrants pursuant to piggy-back registration rights,
     which do not contain liquidated damages.

     Because the registration rights were not granted under a separate
     registration rights agreement, we considered those features in evaluating
     whether the associated warrants should be classified as derivative
     liabilities. Considering that the amount of the maximum penalty is 49%, the
     Company cannot conclude that that this discount represents a reasonable
     approximation of the difference between registered and unregistered shares
     under paragraph 16 of EITF 00-19. Accordingly, the warrants issued in
     connection with the February 2005 transaction are considered derivative
     liabilities.

     The fair value of the warrants issued in connection with the February 2005
     transaction at the date of issuance of the warrants and the granting of
     registration rights and at March 31, 2005 is as follows:

                                   At issuance     At March 31, 2005
                                  -------------   -------------------
     Freestanding warrants           $6,017,350            $5,897,800

     The Company used the following assumptions, using the Black Scholes Model
     to measure the identified derivatives as follows:

     Freestanding warrants

                                          At issuance       At March 31, 2005
                                        ---------------   ---------------------
       Market price:                              $2.40                   $2.32
       Exercise price:                            $1.00                   $1.00
       Term:                                    3 years              2.91 years
       Volatility:                                   39%                     39%
       Risk-free interest rate:                    2.78%                   2.78%
       Number of warrants:                    3,985,000               3,985,000

(6)  LINE OF CREDIT

     In September 2004, the Company's subsidiary renewed its revolving line of
     credit agreement for borrowings up to $1,800,000. The line of credit was
     assumed and renewed by the Company. Borrowings under this

                                        8


     agreement bear interest at prime, are guaranteed by certain related parties
     and are collateralized with the assets of the Company and by the
     certificate of deposit.

(7)  RESTATEMENT OF INTERIM FINANCIAL STATEMENTS

     In connection with the filing of an amendment to our registration statement
     on Form SB-2/A with the Securities and Exchange Commission, and after
     reviewing certain accounting principles we had applied in our financial
     statements for the periods ended March 31, 2005, June 30, 2005, September
     30, 2005, and March 31, 2006 previously filed with the Commission,
     management has determined that those financial statements should no longer
     be relied upon as they did not properly account for certain liquidated
     damages associated with a $3.985 million private placement of warrants and
     shares of our common stock that occurred in February 2005. Previously, the
     Company had not reflected the liquidated damages at their fair value nor
     their effect on other outstanding convertible instruments. Pursuant to the
     terms of the warrants that the Company issued and the registration rights
     granted in such private placement, the warrant holders are entitled to
     liquidated damages pursuant to demand registration rights in the event of a
     failure to timely register the shares after demand is made by the holders
     of a majority of the warrants and shares of common stock issued pursuant to
     such agreement. The demand registration rights of these investors are such
     that if the Company fails to register the investors shares, including the
     shares underlying the warrants, the Company will pay a cash penalty
     amounting to 1% of the amount invested per month, $39,850, if the
     registration statement is not filed within 60 days of demand or is not
     declared effective within 150 days from the date of initial filing. The
     maximum liability associated with the liquidated damages amounts to 49% of
     the gross proceeds associated with the issuance of shares of common stock,
     which amounts to $1,952,650. The percentage of liquidated damages amounts
     to the difference between 60 months, which is the inherent time limitation
     under which the underlying shares would be free-trading (three year term
     and two year holding period) and 11 months, which is the grace period for
     registering the shares (no demand permitted for four months, two-month
     period to file and five-month period to become effective), times the
     penalty percentage, which is 1%. The Company believes that the likelihood
     that it will incur any liabilities resulting from the liquidated damages
     pursuant to the demand registration rights is remote considering that it
     will register the shares and the shares underlying the warrants pursuant to
     piggy-back registration rights, which do not contain liquidated damages.
     Because the registration rights were not granted under a separate
     registration rights agreement, we considered those features in evaluating
     whether the associated warrants should be classified as derivative
     liabilities. Considering that the amount of the maximum penalty is 49%, the
     Company cannot conclude that that this discount represents a reasonable
     approximation of the difference between registered and unregistered shares
     under paragraph 16 of EITF 00-19. Accordingly, the warrants issued in
     connection with the February 2005 transaction are considered derivative
     liabilities.

     Furthermore, the Company failed to indicate that its certificate of deposit
     was restricted as it is used as collateral to secure its line of credit.
     The Company had accounted for its restricted certificate of deposit as part
     of cash and cash equivalents in its statement of cash flows while it should
     have accounted for its purchase of the certificate of deposit as an
     investing activity.

     Additionally, the Company did not properly account for a prior year
     one-time advance from a customer related to a five (5) year licensing
     agreement with this customer. The Company had accounted for the entire
     amount as revenue at the time the funds were received. The funds, at the
     time of its receipt, should have, instead, been accounted for as deferred
     revenue and then amortized to earned revenue over the five (5) year life of
     the agreement.

     The proper accounting for such liquidated damages provision, the restricted
     certificate of deposit, and the advancement of funds from a customer for
     licensing rights affects the following figures in our quarterly financial
     statements:

     Increase in certificate of deposit-restricted ($900,651), derivative
     liabilities ($5,897,800), deferred revenues ($179,167), accumulated deficit
     ($2,265,261), revenues ($12,500), other income-derivatives ($119,500),
     other expense-derivatives ($2,205,642), net loss ($2,073,593), loss per
     share ($.04), and cash used in investing activities ($900,651)on the
     statement of cash flows.

                                        9


     Decrease in additional paid-in capital ($3,811,707).

                                       10


ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS.

You should read the following discussion and analysis of our financial condition
and results of operations together with our interim financial statements and the
related notes appearing at the beginning of this report. The interim financial
statements and this Management's Discussion and Analysis of Financial Condition
and Results of Operations should be read in conjunction with the financial
statements and notes thereto for the year ended December 31, 2004 and the
related Management's Discussion and Analysis of Financial Condition and Results
of Operations, both of which are contained in our annual report on Form 10-KSB
filed with the Securities and Exchange Commission on April 15, 2005 and the
consolidated financial statements and related footnotes thereto for the year
ended December 31, 2004, included in the current report filed on Form 8-K with
the Securities and Exchange Commission on April 19, 2005.

The following discussion and other parts of this Form 10-QSB contain
forward-looking statements that involve risks and uncertainties. Forward-looking
statements can be identified by words such as "anticipates," "expects,"
"believes," "plans," and similar terms. Our actual results could differ
materially from any future performance suggested in this report as a result of
factors, including those discussed in "Factors That May Affect Future Operating
Results" and elsewhere in this report and in our Annual Report on Form 10-KSB
for the fiscal year ended December 31, 2004. All forward-looking statements are
based on information currently available to the Company and we assume no
obligation to update such forward-looking statements, except as required by law.
Service marks, trademarks and trade names referred to in this Form 10-QSB are
the property of their respective owners.

--------------------------------------------------------------------------------

OVERVIEW

We are engaged in the development, manufacturing, and sales of a patented
product we call zNose(R): a device designed to detect and analyze chemical odors
and vapors, or, in other words, an electronic "nose". We believe the zNose(R) is
superior to other electronic "noses" because of its speed, specificity and
sensitivity. The zNose(R) is capable of measuring and quantifying the chemistry
of any compound, fragrance, vapor or odor with parts per trillion sensitivity in
10 seconds. We also believe the zNose(R) has the unique ability to quantify and
speciate the subject chemical vapor by creating visual olfactory images. This
enables the measured odor or vapor to be easily identified by the user.

We believe that our products will have broad applications in the homeland
security and laboratory instrumentation markets. We are involved in ongoing
product research and development efforts in that regard. We have also
concentrated our efforts on further product development, testing and proving and
assembling our sales and support organization.

The Company was originally incorporated under the name "Bluestone Ventures,
Inc.", on July 12, 2000. From inception until February 1, 2005, we engaged in
the business of acquiring, exploring and developing certain mining properties in
Canada. Upon the acquisition of Electronic Sensor Technology, LP (the "ELP"), we
abandoned our mining business and adopted ELP's business of developing,
manufacturing and selling the vapor analysis device. Prior to the closing of the
Mergers, on January 26, 2005, we changed our name to "Electronic Sensor
Technology, Inc."

Our executive offices are located at 1077 Business Center Circle, Newbury Park,
California 91320 and our telephone number is (805) 480-1994.

RESULTS OF OPERATIONS

The following table sets forth, as a percentage of revenues, certain items
included in the Company's Income Statements (see Financial Statements and Notes)
for the periods indicated:

                                       11





                                                    Three months ended March 31,
                                                    ----------------------------
                                                        2005            2004
                                                     (Restated)      (Restated)
                                                    -----------    -------------
                                                                       
STATEMENTS OF OPERATIONS DATA:
     Revenues....................................           100%             100%
     Cost of sales...............................           132%              75%
     Gross profit (loss) ........................           (32%)             25%
     Operating expenses..........................           259%              49%
     (Loss) from operations......................          (291%)            (24%)
     Other (expense).............................          (954%)            (15%)
     Net loss....................................        (1,245%)            (39%)


QUARTER ENDED MARCH 31, 2005 COMPARED TO QUARTER ENDED MARCH 31, 2004

Revenues for the quarter ended March 31, 2005 were $219,500 compared to $326,100
in 2004. Our revenues experienced a decline of 33% due to the slip of deliveries
of some newly re-designed parts.

Gross loss was ($70,600) for the first quarter ended March 31, 2005 compared to
a gross profit of $81,700 for the quarter ended March 31, 2004. This decrease of
$152,300 resulted from increased manufacturing overheads from additional
personnel.

Compensation expenses in the first quarter of 2005 were $59,100 as compared to
$66,600 in 2004. As a percentage of sales, total compensation expenses increased
from 20% of sales to 27% of sales. The decrease of $7,500 was due to decrease of
sales commissions.

Selling expenses in the first quarter of 2005 were $39,200 as compared to $8,300
in 2004. As a percentage of sales, total selling expenses increased from 3% of
sales to 18% of sales. This increase of $30,900 was due to increase of personnel
costs.

General and administrative expenses for the first quarter of 2005 were $469,600
as compared to $83,300 in 2004. As a percentage of sales, general and
administration expenses increased from 26% of sales to 214% of sales. This
increase of $386,300 was primarily due to consulting and professional fees in
connection with the reverse merger.

Interest expense for the first quarter of 2005 was $20,566 as compared to
$16,370 for the same period in 2004. This increase in interest expense, is due
to expanded line of credit and higher interest rate.

Net loss was $2,732,214 for the period ended March 31, 2005 as compared to a
loss of $125,432 for the period ended March 31, 2004. The increase was primarily
due to a combination of higher operating expenses in the first quarter of 2005,
including expenses related to our merger in February 2005, increased sales
activities, increased personnel costs and an expanded new product development
effort, and the recognition of derivative liabilities, as described further
below.

Other income-derivatives primarily consist of the decrease in the fair value of
derivative liabilities between the date of issuance of such derivatives and the
end of the first quarter of 2005. The increase in other income-derivative during
the first quarter of 2005 when compared to the same period in 2004 is primarily
attributable to a decrease in the quoted price of our common stock. We are
unable to determine whether we will record further decreases in the fair value
of derivative liabilities in the foreseeable future, which would be recorded as
other income-derivatives. Such decreases would be generally triggered by a
decrease in the fair value of our stock price, upon satisfaction of liquidated
damages pursuant to registration rights, or, possibly, upon satisfaction of our
convertible debentures. No such derivatives were issued during the first quarter
of 2004.

Other expense-derivatives primarily consist of the recognition of derivative
liabilities we issued during the first quarter of 2005. No such derivatives were
issued during the first quarter of 2004.

LIQUIDITY AND CAPITAL RESOURCES

In the first quarter of 2005 net cash used by the Company for operating
activities was $708,900. In the first quarter of 2004, the cash provided by
Company's operations was $286,600. Cash used in the first quarter of 2005 was

                                       12


comprised of the net loss incurred for the quarter of $2,732,200, plus net
non-cash expenses (including depreciation and amortization of $1,800, the fair
value of issued derivatives of $2,205,600, less decrease in fair value of
derivative liability of $119,600) of $2,087,800, less the net change in
operating assets and liabilities of $64,600. Cash provided from operations in
the first quarter of 2004 consisted of the net loss of $125,400 plus net
non-cash expenses of $6,900, plus the net change in operating assets and
liabilities of cash of $405,100 for a total of $286,600.

Investing activities used cash of $939,600 in the first quarter of 2005,
primarily from the purchase of a certificate of deposit used as collateral for
our line credit, and purchase of property and equipment. Investing activities
provided $9,700 during the first quarter ended March 31, 2004 from the sale of
property and equipment.

Financing activities for the first quarter of 2005 provided cash of $3.5
million, primarily from the issuance of common stock ($3,811,700) less partial
repayment of the line of credit ($200,000) and repayment of partners' loan
($110,000). $373,000 of cash was used in financing activities during the first
quarter of 2004 for repayment of the line of credit ($205,000) and partners'
loan ($230,000).

At March 31, 2005 the Company had cash of $1.9 million compared to $45,000 at
March 31, 2004. At March 31, 2005, the Company had a working deficit of $4.8
million, as compared to a working deficit of $5.5 million at March 31, 2004. The
Company, at present, has a credit facility in place with East West Bank for $1.8
million.

Although we have a bank operating line of credit, there can be no assurance that
these proceeds will be adequate for our capital needs. There can no assurance
that any required or desired financing will be available through any other bank
borrowings, debt, or equity offerings, or otherwise, on acceptable terms. If
future financing requirements are satisfied through the issuance of equity
securities, investors may experience significant dilution in the net book value
per share of common stock and there is no guarantee that a market will exist for
the sale of the Company's shares.

The Company's primary capital needs are to fund its growth strategy, which
includes creating a sales and marketing staff for the marketing, advertising and
selling of the zNose(R) family of chemical detection products, increasing
distribution channels, introducing new products, improving existing product
lines and development of a strong corporate infrastructure.

SEASONALITY AND QUARTERLY RESULTS

We do not foresee any seasonality to our revenues or our results of operations.

INFLATION

Our raw materials and finished products are sourced from cost-competitive
industries. As such, we do not foresee any material inflationary trends for our
product sources.

                                       13


ITEM 3. CONTROLS AND PROCEDURES

Within 90 days prior to the date of this Form 10-QSB, the Company carried out an
evaluation, under the supervision and with the participation of the Company's
management, including the Company's President and Chief Executive Officer along
with the Company's Chief Financial Officer, of the effectiveness of the design
and operation of the Company's disclosure controls and procedures pursuant to
Exchange Act Rule 13a-15(b). Based upon that evaluation, the Company's President
and Chief Executive Officer along with the Company's Chief Financial Officer
concluded that the Company's disclosure controls and procedures are effective in
timely alerting them to material information relating to the Company required to
be included in this Form 10-QSB.

There have been no changes in the Company's internal controls or in other
factors, which could significantly affect the internal controls subsequent to
the date the Company carried out its evaluation.

                                       19


                           PART II - OTHER INFORMATION

ITEM 6.  EXHIBITS

     A.   EXHIBITS

Exhibit
  No.     Description
-------   ----------------------------------------------------------------------
31.1      Certification of Chief Executive Officer Pursuant to Rule 13a-14(a)/
          15d-14(a) of the Exchange Act.

31.2      Certification of Principal Financial and Accounting Officer Pursuant
          to Rule 13a-14(a)/15d-14(a) of the Exchange Act.

32.1      Certification of Chief Executive Officer Pursuant to Rule 13a-14(b) or
          15d-14(b) of the Exchange Act and 18 U.S.C. 1350.

32.2      Certification of Principal Financial and Accounting Officer Pursuant
          to Rule 13a-14(b) or 15d-14(b) of the Exchange Act and 18 U.S.C. 1350.

--------------------------------------------------------------------------------

                                       20


                                   SIGNATURES

In accordance with the requirements of the Exchange Act, the registrant caused
this amended report to be signed on its behalf by the undersigned, thereunto
duly authorized.


                                           ELECTRONIC SENSOR TECHNOLOGY, INC.


Dated September 25, 2006                   By:    /s/ Teong C. Lim
                                                  -----------------------------
                                           Name:  Teong C. Lim
                                           Title: President and Chief Executive
                                                  Officer
                                                  (Principal Executive Officer)


Dated September 25, 2006                   By:    /s/ Francis Chang
                                                  -----------------------------
                                           Name:  Francis Chang
                                           Title: Secretary, Treasurer and Vice
                                                  President of Finance and
                                                  Administration
                                                  (Principal Accounting Officer)

                                       21