R2121 查看數據表（PDF） - Hamamatsu Photonics
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R2121 Datasheet PDF : 4 Pages
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FLAME SENSOR UVtron®
Type No.
Feature
Dimen-
sional
Outline
Bulb
Material
Spectral
Electrode
Material
Weight
Response (nm)
(g) Symbol (Fig. 2)
Supply
Voltage
(V dc)
Maximum Rating
Average A
Discharge
Current
(mA)
Peak B Operation
Current
Ambient
Temperature
(mA)
(°C)
For Fire Detection
R244
High-voltage operation,
standard type
1
UV Glass
Ni
3
185 to 260/A
575
3
R259
Low-voltage operation,
standard type
1
UV Glass
Ni
3
185 to 260/A
420
3
R1753-01
Low-voltage operation,
high-sensitivity
2
UV Glass
Ni
4
185 to 260/A
420
3
R2868
Low-voltage operation,
small size
3
UV Glass
Ni
1.5 185 to 260/A
400
1
R9454
Small size,
resist mechanical shock
4
UV Glass
Ni
1.5 185 to 260/A
500
1
R9533
Low-voltage operation,
resist mechanical shock
5
UV Glass
Ni
2.5 185 to 260/A
400
1
50
-20 to +125
50
-20 to +125
50
-20 to +125
30
-20 to +60
30
-20 to +60
30
-20 to +125
For Burner Monitoring
R259-01
Low-voltage operation,
standard type
1
UV Glass
Mo
3
185 to 300/B
420
5
R1868
Low-voltage,
high-current operation
6
UV Glass
W
4
185 to 280/C
425
(300G)
10
R2121
High-voltage,
high-current operation
6
UV Glass
W
4
185 to 280/C
575
(400G)
10
100
-20 to +125
200
-20 to +125
200
-20 to +125
A Even at these current values, the electrodes are not consumed immediately, but the service life is noticeably reduced. Use the tube within the recommended
current values.
B This is the maximum momentary current that can be handled if its full width at half maximum is less than 10 µs.
iP
10 µs
t
C These are representative values for a wavelength of 200 nm and a light input of 10 pW/cm2. Think of these values as relative sensitivity values. In actual use,
the sensitivity will vary with the wavelength of the ultraviolet radiation and the drive circuitry employed.
D Measured under room illuminations (approximately 500 lux) and recommended operating conditions. Note that these values will increase somewhat in
outdoor uses due to the effect of sunlight.
E This is the service life under the recommend operating conditions. Since high ambient temperatures will reduce the service life, when using the tube in a
high-temperature application, such as a burner monitor, consider using air-cooling.
F When configuring the tube with an external quenching circuit, use circuit constants so that the quenching time becomes longer than these values listed.
When using a pulse driven circuit using CR, if the applied voltage is in the recommended range, the quenching time tq can be calculated with the following
formula. (Refer to the diagram of the recommended operating circuit.)
tq 0.5 × C1 · R1
G The RMS voltage when pulsating current is supplied.
Figure 1: Dimensional Outline (Unit: mm)
1R244, R259, R259-01
2R1753-01
15 MAX.
20.2 MAX.
11.5±1.0
11±1
3R2868
CATHODE
ANODE
TOP VIEW
A – A'
9.0 ± 0.5
FLEXIBLE
LEAD: 0.5
ANODE
CATHODE
TPT A0038EA
CATHODE
ANODE
A
ANODE
A'
UV GLASS BULB
CATHODE 5 × 12
HARD PIN
1
4 PIN BASE
JEDEC No. E9-37
CATHODE
3
72 °C
1
ANODE
ANODE
6 (MESH)
8
CATHODE
TPT A0039EA
LEAD:
0.65 ± 0.05
SIDE VIEW
12 MAX.
ANODE LEAD
CATHODE LEAD
8±1
TPT A0023EB
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