L11354-01_ETC_KPIC1079E02 Datasheet, PDF (2/2 Pages) Hamamatsu Corporation – Quick Detection of Flame from Distance, Compact UV Sensor with High Sensitivity and Wide Directivity, Suitable for Flame Detectors and Fire Alarms.

FLAME SENSOR UVTRON^® R2868
Figure 2: Angular Sensitivity (Directivity)
60°
90°
0°
100 %
30°
30°
80
60
40
20
ANODE
CATHODE
60°
60°
90° 90°
0°
100 %
UV EMISSION
30° POINT
80
60
60°
40
20
90°
ANODE
CATHODE
VERTICAL VIEWING
(Left fig.)
HORIZONTAL
VIEWING
(Left fig.)
TPT B0010EA
Figure 3: Dimensional Outline (Unit: mm)
UV GLASS BULB
A
CATHODE
5 × 12
ANODE LEAD
CATHODE LEAD
CATHODE ANODE
TOP VIEW
A – A'
ANODE
A'
32 MIN.
23 ± 1
44 MAX.
SIDE VIEW
ANODE
8 ± 1 4±1
CATHODE
18 MAX.
LEAD: 0.65 ± 0.05
TPT A0023EB
Figure 4: Recommended Operating Circuit
10 MΩ
4.7 kΩ*
+
ANODE
DC 325 V ± 25 V
220 pF
500 V
UVTRON R2868
CATHODE
PULSE OUTPUT
i _{10 kΩ 1000 pF}
–
* Be sure to connect the 4.7 kΩ resistor within 2.5 cm
from the anode lead end of UVTRON.
TPT C0003EB
GUVTRON Driving circuit C3704 series (sold separately)
Hamamatsu also provide the driv-
ing circuit C3704 series for R2868
operation.
C3704 series include a high volt-
age power supply and a signal
processing circuit in printed circuit
board, which allows to operate
R2868 easily as a flame sensor
with the low input voltage (DC 5 V
to 30 V) only.
For the details, please refer to the
data sheet of C3704 series.
IPRECAUTIONS FOR USE
GUltraviolet Radiation
The UVTRON itself emits ultraviolet radiation in operation. When using two or more UVTRONs at the same time in close
position, care should be taken so that they do not optically interfere with each other.
GVibration and shock
UVTRONs have passed vibration and shock tests in compliance with IEC 60068-2-6 (sinusoidal vibration test 1.5 mm
peak to peak, 100 m/s², 10 Hz to 500 Hz) and IEC 60068-2-27 (shock test 1000 m/s², 11 ms). However if subjected to
strong mechanical shocks such as drop impacts, the glass envelope may crack or internal electrodes may deform
resulting in poor electrical characteristics. So use extreme caution when handling the UVTRON. If the leads are machined
or cut with a wire cutter, the internal electrodes may be subjected to vibrations or shocks greater than the above tests,
resulting in poor electrical characteristics as in the case where they are subjected to drop impacts.
GPolarity
Connect the UVTRON with correct polarity. Should it be connected with reverse polarity, operating errors may occur.
IWARRANTY
The UVTRON is covered by a warranty for a period of one year after delivery. The warranty is limited to replacement of any
defective tube due to defects traceable to the manufacturer.
WEB SITE www.hamamatsu.com
HAMAMATSU PHOTONICS K.K., Electron Tube Division
314-5, Shimokanzo, Iwata City, Shizuoka Pref., 438-0193, Japan, Telephone: [phone], Fax: [phone]
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P. O. Box 6910, Bridgewater. N.J. 08807-0910, U.S.A., Telephone: [phone], Fax: [phone] E-mail: [e-mail]
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: [phone], Fax: [phone] E-mail: [e-mail]
France: Hamamatsu Photonics France S.A.R.L.: 19, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: [phone], Fax: [phone] E-mail: [e-mail]
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road Welwyn Garden City Hertfordshire AL7 1BW, United Kingdom, Telephone: [phone], Fax: [phone] E-mail: [e-mail]
North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171-41 SOLNA, Sweden, Telephone: [phone], Fax: [phone] E-mail: [e-mail]
Italy: Hamamatsu Photonics Italia: S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: [phone], Fax: [phone] E-mail: [e-mail]
TPT 1008E02
DEC. 2008 IP