The TimeHarp 200 PC-board is a complete system for picosecond time resolved measurements, ideally suited for fluorescence lifetime measurements with the PDL 800-B as an excitation source. An integrated design keeps cost down, improves reliability and permits new applications. The system allows sustained measurement rates up to 3 million counts/sec and provides a time resolution under 40 ps. The system operates in reverse start-stop mode to allow synchronisation with fast laser sources.