[en] The final results of Research Project RP503-1 concerning pressure and differential pressure sensor response time verification are presented. A selected sample of nine typical process sensors have been tested using a specially designed hydraulic signal generator and detailed test procedures to verify their ability to produce valid sensor response time measurements in a simulated in-situ configuration. Design details are provided concerning the hydraulic signal generator, and generic test procedures are included to permit the utility user to quickly implement a response time measurement program for these and other similar sensor types