EXHIBIT 16.1 Office of the Chief Accountant Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 April 30, 2002 Dear Sir/Madam: We have read the first five paragraphs of Item 4 included in the Current Report on Form 8-K dated April 30, 2002, of Merrimac Industries, Inc., to be filed with the Securities and Exchange Commission and are in agreement with the statements contained therein. Very truly yours, /s/ Arthur Andersen LLP