UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13D

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                             (AMENDMENT NO. ______)*


                       ELECTRONIC SENSOR TECHNOLOGY, INC.
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                                (Name of Issuer)

                                  Common Stock
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                              (Title of Securities)

                                   285835 10 4
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                                 (CUSIP Number)

                       ELECTRONIC SENSOR TECHNOLOGY, INC.
                           1077 Business Center Circle
                             Newbury Park, CA 91320
                                 (805) 480-1994
                            Attention: Francis Chang
          (Names, Address and Telephone Number of Person Authorized to
                      Receive Notices and Communications)


                                February 1, 2005
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             (Date of Event Which Requires Filing of This Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  that is the subject of this  Schedule  13D, and is filing this
schedule  because of Rule 13d-1(e),  Rule 12d-1(f) or Rule  13d-1(g),  check the
following box. [ ]

Note:  Schedules  filed in paper format shall include a signed original and five
copies of the  schedule,  including  all  exhibits.  See Rule 13d-7(b) for other
parties to whom copies are to be sent.

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).



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CUSIP No.                                                      Page 1 of 4 Pages
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1     Names of Reporting Persons
      IRS Identification Nos. of Above Persons

      TEONG LIM

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2     Check the Appropriate Box if a Member of a Group (See Instructions)

      (a) |_| Not Applicable

      (b) |_| Not Applicable

      Not Applicable

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3     SEC Use Only

4     Source of Funds SC

5     Check if Disclosure  of Legal  Proceedings  is Required  Pursuant to Items
      2(d) or 2(e)

      Not Applicable

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6     Citizenship or Place of Organization      United States
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Number of Shares Beneficially Owned by Each Reporting Person With:

7     Sole Voting Power    5,247,908

8     Shared Voting Power      Not Applicable

9     Sole Dispositive Power    5,247,908

10    Shared Dispositive Power   Not Applicable
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11    Aggregate Amount Beneficially Owned by Each Reporting Person 5,247,908

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12    Check if the  Aggregate  Amount in Row (11) Excludes  Certain  Shares (See
      Instructions)  |_|

      Not Applicable

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13    Percent of Class Represented by Amount in Row (9)     9.6%

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14    Type of Reporting Person (See Instructions) IN

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ITEM 1. SECURITY AND ISSUER.

This statement relates to the common stock ("Common Stock") of Electronic Sensor
Technology,  Inc., a Nevada corporation (the "Issuer").  The principal executive
offices of  Electronic  Sensor  Technology,  Inc.  are located at 1077  Business
Center Circle, Newbury Park, California 91320.

ITEM 2. IDENTITY AND BACKGROUND.

The identity of the person filing this statement is as follows:

a.    Name:               Teong Lim, an individual

b.    Business  Address:  1077 Business  Center Circle
                          Newbury Park,  California 91320

c.    Occupation:         Mr. Lim is a Director and a Vice President
                          of the Issuer

d.    Mr. Lim has not, during the last five years,  been convicted in a criminal
      proceeding (excluding traffic violations or similar misdemeanors).

e.    Mr. Lim was not, during the last five years, a party to a civil proceeding
      of a  judicial  or  administrative  body of  competent  jurisdiction  that
      resulted in a judgment,  decree or final order enjoining future violations
      of, or  prohibiting or mandating  activities  subject to, federal or state
      securities laws or finding any violation with respect to such laws.

f.    Mr. Lim is a citizen of the United States.

ITEM 3. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

On  February 1, 2005,  Teong Lim,  through his  wholly-owned  limited  liability
company,  TC Lim,  LLC (both are  referred  to as "Lim"),  was issued  shares of
common stock ("Common  Stock") from Issuer,  and warrants to purchase  shares of
Common Stock in  connection  with the mergers  ("Mergers")  of two  wholly-owned
subsidiaries of Issuer with and into L & G Sensor Technology, Inc., a California
corporation, and Amerasia Technology, Inc., a California corporation,  such that
Issuer  indirectly held all limited  partnership  interests of Electronic Sensor
Technology,  L.P. ("EST LP"), a California  limited  partnership.  In connection
with the Mergers,  Lim converted  833,334  shares of Amerasia  common stock into
3,851,520  shares  of Issuer  common  stock.  In  addition,  Lim also  converted
$359,643 in principal and accrued  interest  from EST LP  promissory  notes into
359,643 shares of Issuer common stock and warrants to purchase 179,822 shares of
Issuer  common stock  exercisable  at $1.00 per share.  The warrants may only be
exercised  if the stock  price is above $1.50 per share  ("Warrants").  Lim also
received  517,899 shares of Common Stock and 258,950 Warrants in connection with
Amerasia's  conversion  of its  EST  LP  promissory  notes  into  Issuer  equity
securities.  Finally,  Mr. Lim holds options to purchase 80,000 shares of Common
Stock at $1.00 per share.



ITEM 4. PURPOSE OF TRANSACTION.

Lim did not acquire the Common  Stock for the  purpose of  acquiring  control of
Issuer.  Except as discussed  in this Item 4, as of the filing date,  Lim has no
plans or  proposals  that  related to or that would result in any of the actions
specified in clauses (b) though (j) of Item 4 of Schedule 13D,  although he may,
in the future,  in  connection  with his review of his  investment in the Common
Stock from time to time  explore a variety of  alternatives,  including  without
limitation  the  aforementioned  actions.  There is no  assurance  that Lim will
develop any plans or proposals with respect to any of the foregoing actions. Any
alternative  which he best may pursue  will  depend  upon a variety of  factors,
including, without limitation, current and anticipated future trading prices for
the Common Stock, the financial  condition,  results of operations and prospects
of Issuer and general economic, financial market and industry conditions.

ITEM 5. INTEREST IN SECURITIES OF THE ISSUER.

Pursuant to Rule 13d-3  promulgated  under the Securities  Exchange Act of 1934,
Lim is  considered  the  beneficial  owner of a total  of  5,247,908  shares  of
Issuer's  Common  Stock,  representing  approximately  9.6%  of all  issued  and
outstanding  shares of Common Stock. Lim has sole voting power and sole power to
dispose of the Common Stock. Other than the Mergers,  Lim has not engaged in any
transactions  involving  Issuer  Common Stock during the past 60 days.  No other
person is known to have the right to receive or the power to direct the  receipt
of dividends  from,  or the proceeds from the sale of, the Common Stock owned by
Lim.

ITEM 6. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO
        SECURITIES OF THE ISSUER.

Not Applicable.

ITEM 7. MATERIAL TO BE FILED AS EXHIBITS.

Not Applicable.



                                    SIGNATURE

After  reasonable  inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

                                       February 23, 2005



                                       /s/ Teong Lim
                                       -----------------------------------------
                                       Teong Lim