R928

PHOTOMULTlPLlER TUBES R928, R955 Extended Red, High Sensitivity, Multialkali Photocathode 28mm (1-1/8 Inch) Diameter, 9-Stage, Side-On FEATURES Wide Spectral Response R928 ........................................................ 185 to 900 nm R955 ........................................................ 160 to 900 nm High Cathode Sensitivity Luminous ...................................................... 250 A/lm Radiant at 400nm ............................................. 74mA/W High Anode Sensitivity (at 1000V) Luminous ........................................................ 2500A/lm Radiant at 400nm ..................................... 7.4 105 A/W Low Drift and Hysteresis The R928 and R955 feature extremely high quantum efficiency, high current amplification, good S/N ratio and wide spectral response from UV to near infrared. The R928 employs a UV glass envelope and the R955 has a fused silica envelope for UV sensitivity extension. The R928 and R955 are well suited for use in broad-band spectrophotometers, atomic absorption spectrophotometers, emission spectrophotometers and other precision photometric instruments. GENERAL Parameter Spectral Response R928 R955 Wavelength of Maximum Response Photocathode MateriaI Minimum Effective Area Window Material R928 R955 Dynode Secondary Emitting Surface Structure Number of Stages Direct Interelectrode Capacitances Anode to Last Dynode Anode to All Other Electrodes Base Weight SuitabIe Socket SuitabIe Socket Assembly Multialkal...