Electronic instruments maker Ametek Inc. of Berwyn, Pa., has acquired privately held Technical Manufacturing Corp. (TMC) of Peabody, Mass., a manufacturer of vibration isolation systems and optical test benches. Financial terms were not disclosed. TMC’s products are used to isolate highly sensitive instruments such as scanning electron microscopes and ultraprecision machine tools for the microelectronics, life sciences, photonics and ultraprecision manufacturing industries. The company also supplies passive vibration cancellation systems, optical test tables, and acoustic and magnetic isolation hoods. TMC has estimated annual sales of $30 million. It will become part of Ametek Electronic Instrument Group’s Ultra Precision Technologies Div.