Delay Line Transducers are used for precision thickness gaging or some flaw detections of thin materials. Delay line transducers are single element broadband contact transducers designed specifically to incorporate a short piece of plastic or epoxy material in front of the transducer element. These transducers are recommended for thickness measurements of very thin materials on commercially available thickness gauges and flaw detectors. These transducers are versatile with replaceable head options such as membranes and wear caps. Delay line transducers are longitudinal wave transducers that are specifically designed for precision gauging of very thin, smooth materials.