Profile: Sigma Transducers, Inc. specializes in the manufacture of focused dual angle beam transducers. Our product line includes front index, single wedge angle beam, mechanized, high temperature, wedgemount, immersion and contact transducers. Our Sigma front index transducer are available as mechanized units for automated scanning systems. Our Sigma mechanized unit includes a stainless steel case with gimble holes drilled into sides, tubes for couplant feed interface and grooves machined into wedge contact surface.