PHOTOMULTIPLIER TUBE

Modified R928, 8 × 6mm Photocathode Area Size
Low Dark Counts, Extended Red Multialkali, High Sensitivity
For Photon Counting Applications

The R2949 is a 28mm (1-1/8 inch) diameter, 9-stage, side-on type photomultiplier tube having the same extended red multialkali photocathode as the R928. The R2949 features very low dark counts, extremely high quantum efficiency, high gain, good S/N ratio and wide spectral response from UV to near infrared.
The R2949 is well suited for use in various low-level photometries such as general single photon counting applications and fluorescence life time measurement.
The R2949 is directly interchangeable with the R928.

FEATURES
● Low Dark Counts ................................................. 300cps (at 25°C)
● Low Dark Current ............................................. 2nA (after 30min.)
● Wide Spectral Response ........................................ 185 to 900 nm
● High Cathode Sensitivity
    Luminous ...................................................................... 200µA/lm
    Radiant at 400nm ........................................................... 68mA/W
● High Anode Sensitivity (at 1000V)
    Luminous ...................................................................... 2000A/lm
    Radiant at 400nm .................................................... 6.8 × 105A/W
● Low Drift and Hysteresis