
PHOTOMULTIPLIER TUBE R821
Figure 1: Typical Spectral Response
TPMH1210E01
JUL. 1998 
HAMAMATSU  PHOTONICS  K.K., Electoron Tube Center 
314-5, Shimokanzo, Toyooka-village, Iwata-gun, Shizuoka-ken, 438-0193, Japan, Telephone: (81)539/62-5248, Fax: (81)539/62-2205
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P. O. Box 6910, Bridgewater. N.J. 08807-0910, U.S.A., Telephone: (1)908-231-0960, Fax: (1)908-231-1218
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany,  Telephone: (49)8152-375-0, Fax: (49)8152-2658
France:Hamamatsu Photonics France S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: (33)1 69 53 71 00,  Fax: (33)1 69 53 71 10
United Kingdom: Hamamatsu Photonics UK Limted: Lough Point, 2 Gladbeck Way, Windmill Hill, Enfield, Middlesex EN2 7JA, United Kingdom, Telephone: (44)181-367-3560, Fax: (44)181-367-6384
North Europe: Hamamatsu Photonics Norden AB: Frgatan 7, S-164-40 Kista Sweden, Telephone: (46)8-703-29-50,  Fax: (46)8-750-58-95
Italy: Hamamatsu Photonics Italia: S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39)02-935 81 733,  Fax: (39)02-935 81 741
TPMHB0511EA
Figure 2: Typical Gain Characteristics
TPMHB0512EA
Figure 3: Dimensional Outline and Basing Diagram (Unit: mm)
TPMHA0432EB
TACCA0047EA
Socket (Supplied)
(E678-12L)
100
10
1
0.1
0.01
100
200
150
250
300
350
400
WAVELENGTH (nm)
C
Q
CATHODE
RADIANT
SENSITIVITY
QUANTUM
EFFICIENCY
500
600
700
800
1000
1500
10
8
10
1
10
3
10
4
10
6
10
7
SUPPLY VOLTAGE (V)
G
10
2
10
5
DY3
DY5
DY7
DY9
P
SHORT PIN
1
2
3
4
5
6
7
8
9
10
11
12
DY10
DY8
DY6
DY4
DY2
K
DY1
19 ± 1
FACEPLATE
PHOTOCATHODE
8
1
12 PIN BASE
15MIN.
35
28.6
   13
3
3
(
360   
13   
9
1
(
   18
   2
7
   18
   13
2
2-R4
2-   3.2