---

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

SCHEDULE 13G/A

Under the Securities Exchange Act of 1934
(Amendment No. 4)*

SUTRON CORP

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

869380105

(CUSIP Number)

February 14, 2003

(Date of Event which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

[   ] Rule 13d-1(b)
[X] Rule 13d-1(c)
[   ] Rule 13d-1(d)

^* 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).

---

CUSIP No. 869380105

13G/A

PRIVILEGED DRAFT COPY

* includes 0 shares of Sutron Corp common stock, and 93,600 exercisable options to purchase Sutron Corp common stock out of a total of 93,600 options to purchase Sutron Corp common stock.
** based on 4,289,551 shares issued and outstanding on December 31, 2002.

2

---

CUSIP No. 869380105

13G/A

PRIVILEGED DRAFT COPY

** based on 4,289,551 shares issued and outstanding on December 31, 2002.

3

---

CUSIP No. 869380105

13G/A

PRIVILEGED DRAFT COPY

** based on 4,289,551 shares issued and outstanding on December 31, 2002.

4

---

CUSIP No. 869380105

13G/A

PRIVILEGED DRAFT COPY

** based on 4,289,551 shares issued and outstanding on December 31, 2002.

5

---

CUSIP No. 869380105

13G/A

PRIVILEGED DRAFT COPY

Item 1.

	(a)	Name of Issuer
		Sutron Corp (the “Issuer”)
	(b)	Address of Issuer’s Principal Executive Offices
		22400 Davis Drive, Sterling, Virginia 20164

Item 2.

	(a)	Name of Person Filing
		Raul S. McQuivey
	(b)	Address of the Principal Office or, if none, residence
		22400 Davis Drive, Sterling, Virginia 20164
	(c)	Citizenship
		United States
	(d)	Title of Class of Securities
		Common Stock
	(e)	CUSIP Number
		869380105

Item 3. If this statement is filed pursuant to §§240.13d -1(b) or 240.13d -2(b) or (c), check whether the person filing is a: Not Applicable

	(a)	[_]	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).
	(b)	[_]	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).
	(c)	[_]	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).
	(d)	[_]	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).
	(e)	[_]	An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);
	(f)	[_]	An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);
	(g)	[_]	A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G);
	(h)	[_]	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
	(i)	[_]	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
	(j)	[_]	Group, in accordance with §240.13d-1(b)(1)(ii)(J).

Item 4. Ownership.

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

---

	(a)	Amount beneficially owned: 813,186
	(b)	Percent of class: 19.0%**
	(c)	Number of shares as to which the person has: 813,186

	(i)	Sole power to vote or to direct the vote 0.
	(ii)	Shared power to vote or to direct the vote 719,586.
	(iii)	Sole power to dispose or to direct the disposition 93,600
	(iv)	Shared power to dispose or to direct the disposition of 719,586.

** based on 4,289,551 shares issued and outstanding on December 31, 2002.

Instruction. For computations regarding securities which represent a right to acquire an underlying security see §240.13d -3(d)(1).

Item 5. Ownership of Five Percent or Less of a Class.

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [_].

Instruction. Dissolution of a group requires a response to this item.

Item 6. Ownership of More than Five Percent on Behalf of Another Person.

Raul S. McQuivey and Karen T. McQuivey as sole trustees of both the Raul S. McQuivey Trust dated 3/24/1999 and the Karen T. McQuivey Trust dated 3/24/1999.

Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company.

Not Applicable

Item 8. Identification and Classification of Members of the Group.

Not Applicable

Item 9. Notice of Dissolution of Group.

Not Applicable

Item 10. Certification.

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

---

CUSIP No. 869380105

13G/A

PRIVILEGED DRAFT COPY

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.

---