News Release

FOR IMMEDIATE RELEASE

Contact: Mason N. Carter, Chairman & CEO
973-575-1300, ext. 1202
mnc@merrimacind.com

Merrimac Receives Two Multi-Mix® Co-Design Module Contracts From General Dynamics for Next Generation Satcom Receivers

WEST CALDWELL, N.J. May 18, 2007: Merrimac Industries, Inc. (AMEX: MRM), today announced that it received both an Internal Research And Development (IRAD) and a new co-design contract as a follow-on to the IRAD contract for multifunction integrated modules from General Dynamics Advanced Information Systems, a business unit of General Dynamics (NYSE: GD). The initial design efforts are valued at approximately $500,000. Final design and manufacture of the subassembly modules from the IRAD contract was completed and delivered in April 2007.

Merrimac Chairman and CEO Mason N. Carter commented, "Although we have had a long standing customer relationship with General Dynamics, this project has taken our relationship to a new level. The co-design relationship with General Dynamics is evolving into one of strategic significance. Both Merrimac and General Dynamics design and process engineers are co-designing together and utilizing Multi-Mix® as the enabling technology to provide an integrated multifunction module for use in General Dynamics next generation satellite receivers."

About General Dynamics

General Dynamics Advanced Information Systems designs, develops, manufactures, integrates, operates and maintains mission systems for defense, space, intelligence, surveillance, reconnaissance, homeland security and homeland defense customers. Headquartered in Fairfax, Va., the company specializes in ground systems, imagery processing, mission payloads, space vehicles; maritime subsurface, surface and airborne mission systems; and tasking, collection, processing, exploitation, and dissemination programs for national intelligence. More information is available on the Internet at www.gd-ais.com.

General Dynamics, headquartered in Falls Church, Va., employs approximately 82,600 people worldwide, and had 2006 revenues of approximately $24.1 billion. The company is a market leader in mission-critical information systems and technologies; land and expeditionary combat systems, armaments and munitions; shipbuilding and marine systems; and business aviation. More information can be found online at www.generaldynamics.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 used in 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. has facilities located in West Caldwell, NJ, San Jose, Costa Rica and Ottawa, Ontario, Canada, and has approximately 210 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®, System In A Package®, SIP® and Total Integrated Packaging Solutions® are registered trademarks of Merrimac Industries, Inc. For more information about Merrimac Industries, Inc. and its Canadian subsidiary Filtran Microcircuits Inc., please visit http://www.merrimacind.com and http://www.filtranmicro.com .

This Press Release contains statements relating to future results of the Company (including certain projections and business trends) that are “forward-looking statements” as defined in the Private Securities Litigation Reform Act of 1995. Actual results may differ materially from those projected as a result of certain risks and uncertainties. These risks and uncertainties include, but are not limited to: risks associated with demand for and market acceptance of existing and newly developed products as to which the Company has made significant investments, particularly its Multi-Mix® products; the possibilities of impairment charges to the carrying value of our Multi-Mix® assets, thereby resulting in charges to our earnings; risks associated with adequate capacity to obtain raw materials and reduced control over delivery schedules and costs due to reliance on sole source or limited suppliers; slower than anticipated penetration into the satellite communications, defense and wireless markets; failure of our Original Equipment Manufacturer, or OEM, customers to successfully incorporate our products into their systems; changes in product mix resulting in unexpected engineering and research and development costs; delays and increased costs in product development, engineering and production; reliance on a small number of significant customers; the emergence of new or stronger competitors as a result of consolidation movements in the market; the timing and market acceptance of our or our OEM customers’ new or enhanced products; general economic and industry conditions; the risk that the benefits expected from the Company’s acquisition of Filtran Microcircuits Inc. are not realized; the ability to protect proprietary information and technology; competitive products and pricing pressures; our ability and the ability of our OEM customers to keep pace with the rapid technological changes and short product life cycles in our industry and gain market acceptance for new products and technologies; foreign currency fluctuations between the U.S. and Canadian dollars; risks relating to governmental regulatory actions in communications and defense programs; and inventory risks due to technological innovation and product obsolescence, as well as other risks and uncertainties as are detailed from time to time in the Company’s Securities and Exchange Commission filings. These forward-looking statements are made only as of the date hereof, and the Company undertakes no obligation to update or revise the forward-looking statements, whether as a result of new information, future events or otherwise.