
WAVELENGTH (nm)
C
Q
0.01
1
10
100
100
300
200
400
500
600
700
800
0.1
CATHODE RADIANT
SENSITIVITY
QUANTUM EFFICIENCY
PHOTOMULTIPLIER TUBE
R6925
Unit
nm
nm
Parameter
Spectral Response
Wavelength of Maximum Response
Photocathode
Material
Minimum Effective Area
Window Material
Dynode
Secondary Emitting Surface
Structure
Number of Stages
Direct Interelectrode Capacitances
Anode to Last Dynode
Anode to All Other Electrodes
Base
185 to 730
410
Bialkali
8
×
24
UV glass
—
mm
Bialkali
Circular-cage
9
—
—
—
4
6
pF
pF
11-pin base
JEDEC No.B11-88
45
E678-11A(option)
E717-21(option)
Weight
Suitable Socket
Suitable Socket Assembly
g
—
—
Figure 1: Typical Spectral Response
Description/Value
High Sensitivity Bialkali Photocathode
28mm (1-1/8 Inch) Diameter, 9-Stage, Side-On Type
FEATURES
Spectral Response ............................ 185 to 730 nm
Cathode Sensitivity
Luminous........................................70
μ
A/lm Typ.
Radiant at 410 nm .......................... 68mA/W Typ.
Anode Sensitivity (at 1000V)
Luminous.........................................500A/lm Typ.
Radiant at 410 nm ................... 4.8
×
10
5
A/W Typ.
APPLICATIONS
Fluorescence Spectrophotometers
Emission Spectrophotometers
Atomic Absorption Spectrophotometers
TPMSB0123EA
TPMSF0073
GENERAL
Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications are
subject to change without notice. No patent rights are granted to any of the circuits described herein. 1997 Hamamatsu Photonics K.K
Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office.