GENERAL

PHOTOMULTIPLIER TUBE

R446

Figure 1: Typical Spectral Response

TPMSB0090EB

100

200

300

400

500

600

700 800

900 1000

WAVELENGTH (nm)

0.01

0.1

1

10

100

QUANTUM

EFFICIENCY

CATHODE RADIANT

SENSITIVITY

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.

Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office.

SPECIFICATIONS

FEATURES

GWide Spectral Response .........................

GCathode Sensitivity

Luminous .........................................................

Radiant at 330 nm .............................................

GAnode Sensitivity (at 1000 V)

Luminous ...........................................................

Radiant at 330 nm ......................................

GLow Drift and Hysteresis

185 nm to 870 nm

120

µA/lm

44 mA/W

600 A/lm

2.2

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.

Parameter

Description/Value

Unit

Spectral Response

Wavelength of Maximum Response

Photocathode

Window Material

Dynode

Direct Interelectrode

Capacitances

Base

Weight

Operating Ambient Temperature

Storage Temperature

SuitabIe Socket

SuitabIe Socket Assembly

185 to 870

330

Multialkali

8

× 24

UV glass

Multialkali

Circular-cage

9

4

6

11-pin base JEDEC No. B11-88

Approx. 45

-30 to +50

-30 to +50

E678–11A (Sold Separately)

E717–63 (Sold Separately)

E717–74 (Sold Separately)

nm

nm

—

mm

—

—

—

—

pF

pF

—

g

°C

°C

—

—

MateriaI

Minimum Effective Area

Secondary Emitting Surface

Structure

Number of Stages

Anode to Last Dynode

Anode to All Other Electrodes