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FLAME SENSOR
UVtron (R)
UVtron is an ultraviolet detector tube that uses the photoelectric effect of metal and gas multiplication effect of electric current by means of discharge. It has a very narrow range of sensitivity from 185 nm to 300 nm and is completely insensitive to visible light. Because it used the discharge phenomenon, its sensitive is high and an adequate output voltage is obtained, making it possible to design a high-sensitivity, quick response ultraviolet detection with simple circuitry. The UVtron reliably detects faint ultraviolet emissions from flames, making it ideal for applications such as fire alarms, arson surveillance, and burner combustion monitor devices. The UVtron can also detect discharges such as corona discharges from high-voltage power transmission lines.
FEATURES
GCapability of Detecting Very Weak Ultraviolet Rays (from 1 pW) GNot Sensitive to Visible and Infrared Light (Solar Blind Characteristics) GHigh Reliability and long service life (10 000 hours of Continual Discharge Operation) GHigh Speed Response (A Few Milliseconds) GLow Current Operation GCompact and Lightweight
APPLICATIONS
GCombustion Monitoring Apparatus for Gas and Oil Burner GFire Alarm Apparatus GArson Watch Monitors GPhotoelectronic Counter GDetection of Ultraviolet Ray Leakage GDetection of Discharge Phenomenon
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. (c)2007 Hamamatsu Photonics K.K.
FLAME SENSOR UVtron (R)
Type No. Feature Spectral DimenBulb Electrode Response (nm) Weight sional Material Material Outline Symbol (Fig. 2) (g) 1 1 2 3 4 5 Supply Voltage (V dc)
Average A Discharge Current
Maximum Rating Peak Current (mA) (mA)
B
Operation Ambient Temperature
(C)
For Fire Detection
R244 R259 R1753-01 R2868 R9454 R9533
High-voltage operation, standard type Low-voltage operation, standard type Low-voltage operation, high-sensitivity Low-voltage operation, small size Small size, resist mechanical shock Low-voltage operation, resist mechanical shock Low-voltage operation, standard type Low-voltage, high-current operation High-voltage, high-current operation
UV Glass UV Glass UV Glass UV Glass UV Glass UV Glass
Ni Ni Ni Ni Ni Ni
3 3 4 1.5 1.5 2.5
185 to 260/A 185 to 260/A 185 to 260/A 185 to 260/A 185 to 260/A 185 to 260/A
575 420 420 400 500 400
3 3 3 1 1 1
50 50 50 30 30 30
-20 to +125 -20 to +125 -20 to +125 -20 to +60 -20 to +60 -20 to +125
For Burner Monitoring
R259-01 R1868 R2121 1 6 6 UV Glass UV Glass UV Glass Mo W W 3 4 4 185 to 300/B 185 to 280/C 185 to 280/C 420 425 (300G) 575 (400G) 5 10 10 100 200 200 -20 to +125 -20 to +125 -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 s.
iP
10 s 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 x C1 * R1 G The RMS voltage when pulsating current is supplied.
Figure 1: Dimensional Outline (Unit: mm) 1R244, R259, R259-01
15 MAX. ANODE 20.2 MAX. 11.51.0 262 342 111 9.0 0.5 TOP VIEW A - A'
2R1753-01
3R2868
CATHODE
32 MAX.
6 MAX.
CATHODE 202
ANODE
A ANODE
A' UV GLASS BULB CATHODE 5 x 12
38 MIN.
44 MAX. HARD PIN 1 4 PIN BASE JEDEC No. E9-37
18 MAX.
23 1
FLEXIBLE LEAD: 0.5
7 MAX.
32 MIN.
12 MAX.
ANODE CATHODE 3 72 C 1 8 ANODE 6 (MESH)
41 8 1
ANODE LEAD CATHODE LEAD 81
LEAD: 0.65 0.05 CATHODE SIDE VIEW
CATHODE
ANODE
TPT A0038EA
TPT A0039EA
TPT A0023EB
Characteristics (at 25 C)
Discharge Discharge Starting Voltage Sustaining Voltage Max. Typ.
Recommended Operating Parameters Service LifeE Typ. (hours) Supply Voltage (V dc)
Average Discharge Current
(V dc)
(V dc)
Sensitivity C Typ. (min-1)
Background D Min. (min-1)
(mA)
Socket Quenching F (Sold Separately) Type No. Time Min. (Fig. 3) (ms)
440 260 260 280 360 280
330 220 185 240 300 230
600 600 10000 5000 4000 10000
5 5 5 10 10 10
10000 10000 10000 10000 10000 10000
50050 32525 32525 32525 40025 35025
0.3 0.3 0.3 0.3 0.3 0.3
1 1 2 2 2 1
-- -- E678-9C -- -- E678-8F
R244 R259 R1753-01 R2868 R9454 R9533
260 240 (170G) 440 (310G)
200 170 310
200 1500 1500
10 10 10
10000 10000 10000
32525 31030 (22020G) 50050 (35035G)
0.5 2 2
1 2 2
-- E678-9C E678-9C
R259-01 R1868 R2121
Figure 2: Spectral Response
100
TPT B0035EA
Figure 3: Sockets (Unit: mm)
E678-9C
35 28.6 10
E678-8F
24 18
RELATIVE SENSITIVITY (%)
B
2- 3.2 2- 2.2 13 2.0
1 A C 0.1 160
23.6
10
2.8 17.4
180
200
220
240
260
280
300
320
TACCA0283EA
11
WAVELENGTH (nm)
TACCA0289EA
4R9454
CATHODE
5R9533
13.5 1.0
6R1868, R2121
ANODE TOP VIEW A - A' 9.0 0.5 TOP VIEW
CATHODE ANODE 20.2 MAX.
45
15
20 2 32 MAX.
M
AX
.
CATHODE
ANODE
A ANODE 44 MAX. 32 MIN.
A' UV GLASS BULB CATHODE 5 x 10
10 2
14 MAX.
7 MAX.
6.4 1.0
18 MAX.
23 1
8- 0.70 0.05
HARD PIN 1
12 MAX. 4.15 MAX. SIDE VIEW ANODE MARK (RED)
4 PIN BASE JEDEC No. E9-37
ANODE 3 72 1
6
41 8 1
ANODE LEAD CATHODE LEAD 81 P.C.D. 7.9 0.1 CATHODE 14-25.71
LEAD: 0.65 0.05 SIDE VIEW
ANODE BOTTOM VIEW
TPT A0035EA
11.9
ANODE
8
TPT A0036EB
152 CATHODE CATHODE
TPT A0040EA
3.4
10
FLAME SENSOR UVtron (R)
Figure 4: Recommended Driver Circuits
+ 10 M 4.7 k* ANODE
SUPPLY VOLTAGE
220 pF 500 V i
CATHODE PULSE OUTPIT 10 k 1000 pF
- * This 4.7 k resistor must be connected within 2.5 cm from the tip of the UVtron anode lead.
TPT C0016EA
IPRECAUTIONS FOR USING THE UV TRON
GUV TRON light emission When the UVtron discharges, it emits ultraviolet radiation. If a number of UVtron are used in close proximity, they must be arranged so that they will not interfere with each other optically. GHumidity Humidity around the leads for the UVtron generates leak current, dropping the anode voltage, and stopping the tube from operating. In particular, if dirt, dust etc. get on the leads, that makes it easier for humidity to be absorbed, so keep the area around the leads clean. GDirt on the window Since the UVtron operates at high voltage, static electricity causes dust to build up on the surface of the glass bulb. This invites lowering of the ultraviolet transmissivity and sensitivity of the UVtron, so periodic maintenance, such as wiping off with gauze dipped in alcohol, is necessary. GSoldering For mounting the UVtron on a printed circuit board, solder it quickly (350 C for less than 5 seconds). If the leads are heated excessively, the glass can crack or the characteristics of the UVtron deteriorate. After soldering, wipe away the solder flux with alcohol or a similar agent. If the leads are left dirty, current leak due to humidity will lower the voltage applied to the UVtron socket available from HAMAMATSU. GVibration and shock UVtrons have passed vibration and shock tests in compliance with JIS C 60068-2-6 (sinusoidal vibration test - R9454, R9533: 3.0 mm peak to peak, 200 m/s2, 10 Hz to 2000 Hz; other types: 1.5 mm peak to peak, 100 m/s2, 10 Hz to 500 Hz) and JIS C 60068-2-27 (shock test - R9454, R9533: 10000 m/s2, 1 ms; other types: 1000 m/s2, 11 ms). However Cif 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. GPolarity Connect the UVtron with correct polarity. Reverse polarity connection will cause malfunction or breakdown.
IWARRANTY
The UV TRON 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: (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 E-mail: usa@hamamatsu.com Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658 E-mail: info@hamamatsu.de France: Hamamatsu Photonics France S.A.R.L.: 19, 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 E-mail: infos@hamamatsu.fr United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road Welwyn Garden City Hertfordshire AL7 1BW, United Kingdom, Telephone: 44-(0)1707-294888, Fax: 44(0)1707-325777 E-mail: info@hamamatsu.co.uk North Europe: Hamamatsu Photonics Norden AB: Smidesvagen 12, SE-171-41 SOLNA, Sweden, Telephone: (46)8-509-031-00, Fax: (46)8-509-031-01 E-mail: info@hamamatsu.se 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 E-mail: info@hamamatsu.it TPT 1021E02
MAY 2007. IP

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