The portable ultrasonic transducer characterization station (TCS) was developed in support of the U.S. Air Force Manufacturing Technology Contract F33615-85-C-5036, “Advanced Ultrasonic NDE Transducer Performance and Producibility”. The program objective is to develop and demonstrate multiple commercial sources of well characterized, reproducible ultrasonic transducers. The overall task of this MANTECH program is to develop procedures to help users write performance specifications and to develop tools to help suppliers design ultrasonic transducers to meet performance specifications.