title: Device for improving ultrasonic transit time measurements with standard pulse echo equipment.
abstract: A simple and inexpensive device is described which in conjunction with conventional pulse echo equipment allows the direct measurement of the time interval between the zeros of selected individual cycles in different echoes with an accuracy better than 0.2 ns.
authors.affiliation: Institut für Experimentalphysik, Universität Innsbruck, A-6020 Innsbruck, Austria.
authors.forename: G A
authors.initials: GA
authors.lastname: Reider
authors.forename: E
authors.initials: E
authors.lastname: Kittinger