The PHR 402 and PHR 403 are accessories for the PicoHarp 300 TCSPC unit. They permit to operate up to 4 detectors with either TTL output (PHR 402) or with NIM output (PHR 403) quasi in parallel on one PicoHarp 300. Typical detectors used are the SPCM-AQR(H)-Series from Perkin Elmer or the PDM-Series from Micro Photon Devices (MPD). With the PHR 402/PHR 403 users can collect fluorescence lifetime decays on multiple channels simultaneously. This permits simplified collection of e.g. polarization dependent data as well as sophisticated new multi-dimensional fluorescence detection methods in the life sciences or in general sensitive analytics, down to the single molecule level. The 4-channel routers are powered by the PicoHarp 300 and support both histogramming and Time-tagged Time-resolved (TTTR) modes. The latter allows the recording of each individual photon with its picosecond timing, the arrival time at ns resolution and the detector channel it came from. This permits ultimate flexibility in data analysis e.g. for single molecule burst detection or Fluorescence Correlation Spectroscopy (FCS) combined with fluorescence lifetime information.

For users that require full flexibility in their detector configuration, the PHR 800 is available, which supports almost any detector signal.