QUEBEC, Canada, Nov. 8 -- Burleigh Instruments Inc., a supplier of dense wavelength division multiplexing (DWDM) wavelength measurement instruments and positioning equipment in Victor, N.Y., has agreed to be acquired by Exfo Electro-Optical Engineering Inc. for $235 million in Exfo stock and $40 million in cash. "This acquisition increases the breadth and scope of our industrial and scientific product line with a number of complementary, high-performance DWDM test instruments," said Germain Lamonde, chairman, CEO and president of Exfo. "In addition, we will be able to expand the capabilities of our automated test systems by offering precision alignment as well as testing during the assembly and packaging of optical components. This dynamic manufacturing process will help our customers increase yields, reduce costs, improve productivity and lessen human intervention on the production floor." Exfo designs, manufactures and markets fiber optic test, measurement and monitoring instruments for the telecommunications industry.