Merrimac Announces First Quarter 2005 Financial Results and Conference Call Information

WEST CALDWELL, N.J., May 16, 2005: Merrimac Industries, Inc. (AMEX: MRM), a leader in the design and manufacture of RF Microwave components, assemblies and micro-multifunction modules (MMFM®), today announced plans to release its first quarter 2005 financial results before the market opens on Tuesday, May 17, 2005.

Investors are invited to participate in the financial results conference call on Tuesday, May 17, 2005 at 3:00 p.m. (Eastern) by dialing 1-800-231-9012 (for International callers: 1-719-457-2617) ten minutes prior to the scheduled start time, and reference the Merrimac Industries first quarter 2005 conference call. For those unable to participate, a replay will be available for seven days by dialing 1-888-203-1112, or 1-719-457-0820 for international callers, passcode number 9184550.

This conference call will also be broadcast live over the internet by logging on to the web at this address:

http://phx.corporate-ir.net/playerlink.zhtml?c=73209&s=wm&e=1069532

If you are unable to participate during the live webcast, a link to the archived webcast will be listed on the Merrimac Industries, Inc. website.

http://www.merrimacind.com

About Merrimac

Merrimac Industries, Inc. is a leader in the design and manufacture of RF Microwave signal processing components, subsystem assemblies, and Multi-Mix® micro-multifunction modules (MMFM®), for the worldwide Defense, Satellite Communications (Satcom), Commercial Wireless and Homeland Security market segments. Merrimac is focused on providing Total Integrated Packaging Solutions® with Multi-Mix® Microtechnology, a leading edge competency providing value to our customers through miniaturization and integration. Multi-Mix® MMFM® provides a patented and novel packaging technology that employs a platform modular architecture strategy that incorporates embedded semiconductor devices, MMICs, etched resistors, passive circuit elements and plated-through via holes to form a three-dimensional integrated module applicable to High Power, High Frequency and High Performance mission-critical applications. Merrimac Industries facilities are registered under ISO 9001:2000, an internationally developed set of quality criteria for manufacturing operations.

Merrimac Industries, Inc. and its subsidiary Filtran Microcircuits Inc., are located in West Caldwell, NJ, San Jose, Costa Rica and Ottawa, Ontario, Canada, and have approximately 230 co-workers dedicated to the design and manufacture of signal processing components, gold plating of high-frequency microstrip, bonded stripline and thick metal-backed Teflon (PTFE) micro-circuitry and subsystems providing Total Integrated Packaging Solutions® for wireless applications. Merrimac (MRM) is listed on the American Stock Exchange. Multi-Mix®, Multi-Mix PICO®, MMFM® and Total Integrated Packaging Solutions® are trademarks of Merrimac Industries, Inc. For more information about Merrimac Industries, Inc. and Filtran Microcircuits Inc., please visit http://www.merrimacind.com and http://www.filtranmicro.com.

Contact:

Mason N. Carter, Chairman & CEO
973.575.1300, ext. 1202
E-mail: mnc@merrimacind.com