Endevco Corporation has marked the 6,000th successful field installation of its industry best-selling Model 2221F, a high impedance, piezoelectric accelerometer, designed for high temperature shock and vibration measurements. The exceptional, proven performance characteristics of Model 2221F have enabled it to be used historically across a variety of aerospace, flight test, and other demanding applications, most notably, as part of NASA’s Space Shuttle Return to Flight Program, as well as within the shuttle programs of today. Model 2221F is used to help verify that no detrimental damage has occurred on the leading edge of the shuttle wing, prior to its return from orbit.