PHOTOMULTIPLIER TUBE
R446
Multialkali Photocathode Sensitive to 870 nm
28 mm (1-1/8 Inch) Diameter, 9-Stage, Side-On Type
The R446 features high quantum efficiency, high current
amplification, good S/N ratio and wide spectral response
from UV to near infrared. The R446 employs a UV-trans-
mitting glass envelope for UV sensitivity extension.
The R446 is well suited for use in broad-band spectro-
photometers, atomic absorption spectrophotometers,
chromatographs, NOx analyzers and other precision pho-
tometric instruments.
FEATURES
GWide
Spectral Response ......................... 185 nm to 870 nm
GCathode
Sensitivity
Luminous ......................................................... 120
µA/lm
Radiant at 330 nm ............................................. 44 mA/W
GAnode
Sensitivity (at 1000 V)
Luminous ........................................................... 600 A/lm
Radiant at 330 nm ...................................... 2.2
×
10
5
A/W
GLow
Drift and Hysteresis
Figure 1: Typical Spectral Response
SPECIFICATIONS
GENERAL
Parameter
Description/Value
185 to 870
Spectral Response
330
Wavelength of Maximum Response
MateriaI
Multialkali
Photocathode
Minimum Effective Area
8
×
24
UV glass
Window Material
Secondary Emitting Surface
Multialkali
Structure
Circular-cage
Dynode
Number of Stages
9
4
Direct Interelectrode Anode to Last Dynode
6
Anode to All Other Electrodes
Capacitances
Base
11-pin base JEDEC No. B11-88
Weight
Approx. 45
Operating Ambient Temperature
-30 to +50
Storage Temperature
-30 to +50
SuitabIe Socket
E678–11A (Sold Separately)
E717–63 (Sold Separately)
SuitabIe Socket Assembly
E717–74 (Sold Separately)
Unit
nm
nm
—
mm
—
—
—
—
pF
pF
—
g
°C
°C
—
—
CATHODE RADIANT SENSITIVITY (mA/W)
QUANTUM EFFICIENCY (%)
TPMSB0090EB
100
CATHODE RADIANT
SENSITIVITY
10
1
QUANTUM
EFFICIENCY
0.1
0.01
100 200 300 400 500 600 700 800 900 1000
WAVELENGTH (nm)
Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office.
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. ©2006 Hamamatsu Photonics K.K.
HAMAMATSU [ HAMAMATSU CORPORATION ]
