flame sensor uvtron 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. ?007 hamamatsu photoni cs k.k. subject to local technical requirements and regulations, availability of products included in this promotional material may var y. please consult with our sales office. features applications combustion monitoring apparatus for gas and oil burner fire alarm apparatus arson watch monitors photoelectronic counter detection of ultraviolet ray leakage detection of discharge phenomenon capability of detecting very weak ultraviolet rays (from 1 pw) not sensitive to visible and infrared light (solar blind characteristics) high reliability and long service life (10 000 hours of continual discharge operation) high speed response (a few milliseconds) low current operation compact and lightweight uvtron is an ultraviolet detector tube that uses the photo- electric 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 insensi- tive to visible light. because it used the discharge phenom- enon, 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 dis- charges from high-voltage power transmission lines.
flame sensor uvtron 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. c these are representative values for a wavelength of 200 nm and a light input of 10 pw/cm 2 . 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 inc rease 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 t han 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 ca lculated with the following formula. (refer to the diagram of the recommended operating circuit.) tq 0.5 c 1 r 1 g the rms voltage when pulsating current is supplied. 10 s t i p figure 1: dimensional outline (unit: mm) 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 1 1 2 3 4 5 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 -20 to +125 -20 to +125 -20 to +125 -20 to +60 -20 to +60 -20 to +125 dimen- sional outline feature type no. electrode material bulb material 185 to 260/a 185 to 260/a 185 to 260/a 185 to 260/a 185 to 260/a 185 to 260/a spectral response (nm) symbol (fig. 2) weight 50 50 50 30 30 30 ( c) (ma) b 3 3 3 1 1 1 average discharge current (ma) a 575 420 420 400 500 400 supply voltage operation ambient temperature peak current (v dc) (g) maximum rating r259-01 r1868 r2121 low-voltage operation, standard type low-voltage, high-current operation high-voltage, high-current operation 1 6 6 uv glass uv glass uv glass mo w w 3 4 4 -20 to +125 -20 to +125 -20 to +125 185 to 300/b 185 to 280/c 185 to 280/c 100 200 200 5 10 10 420 425 (300 g ) 575 (400 g ) for fire detection for burner monitoring 1 r244, r259, r259-01 3 r2868 2 r1753-01 tpt a0023eb tpt a0038ea tpt a0039ea anode cathode flexible lead: 0.5 26 2 6 max. 15 max. 34 2 38 min. 3 1 6 8 anode (mesh) cathode anode cathode 72 c 32 max. 11.5 1.0 11 1 20.2 max. 7 max. hard pin 1 20 2 4 pin base jedec no. e9-37 cathode 5 12 uv glass bulb anode a' a 9.0 0.5 8 1 23 1 8 1 18 max. 32 min. 44 max. 4 1 cathode lead cathode anode lead 12 max. side view top view a?' lead: 0.65 0.05 anode cathode anode
figure 2: spectral response tpt b0035ea e678-9c e678-8f r244 r259 r1753-01 r2868 R9454 r9533 type no. socket (sold separately) (fig. 3) 0.3 0.3 0.3 0.3 0.3 0.3 (ma) 1 1 2 2 2 1 (ms) 10000 10000 10000 10000 10000 10000 service life typ. (hours) f e c 5 5 5 10 10 10 background min. supply voltage (min -1 ) d 600 600 10000 5000 4000 10000 sensitivity typ. (min -1 ) 330 220 185 240 300 230 (v dc) 440 260 260 280 360 280 discharge starting voltage max. discharge sustaining voltage typ. average discharge current quenching time min. (v dc) 500 50 325 25 325 25 325 25 400 25 350 25 e678-9c e678-9c r259-01 r1868 r2121 0.5 2 2 1 2 2 10000 10000 10000 10 10 10 200 1500 1500 200 170 310 260 240 (170 g ) 440 (310 g ) 325 25 310 30 (220 20 g ) 500 50 (350 35 g ) (v dc) recommended operating parameters characteristics (at 25 c) 4 R9454 5 r9533 6 r1868, r2121 tpt a0036eb tpt a0035ea tpt a0040ea 160 0.1 1 10 100 180 200 220 240 wavelength (nm) 260 280 300 320 relative sensitivity (%) b a c 9.0 0.5 8 1 12 max. side view a' a cathode 5 10 uv glass bulb anode 18 max. 32 min. 44 max. 23 1 8 1 4 1 cathode lead anode lead cathode anode top view a a' cathode anode lead: 0.65 0.05 top view side view bottom view 4.15 max. 6.4 1.0 10 2 14 max. 20 2 13.5 1.0 p.c.d. 7.9 0.1 14-25.71 cathode anode 8- 0.70 0.05 anode cathode 3 1 6 8 cathode cathode anode anode 72 32 max. 15 max. 20.2 max. 7 max. hard pin 1 15 2 4 pin base jedec no. e9-37 11.9 anode mark (red) 45 figure 3: sockets (unit: mm) tacca0289ea tacca0283ea e678-8f e678-9c 23.6 10 28.6 35 2- 3.2 2.0 17.4 24 18 2- 2.2 13 11 2.8 3.4 10
tpt 1021e02 may 2007. ip flame sensor uvtron figure 4: recommended driver circuits precautions for using the uv tron uv 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. humidity 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 ar ea around the leads clean. dirt 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. soldering 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. vibration 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/s 2 , 10 hz to 2000 hz; other types: 1.5 mm peak to peak, 100 m/s 2 , 10 hz to 500 hz) and jis c 60068-2-27 (shock test - R9454, r9533: 10000 m/s 2 , 1 ms; other types: 1000 m/s 2 , 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. polarity connect the uvtron with correct polarity. reverse polarity connection will cause malfunction or breakdown. warranty 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. tpt c0016ea 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, fa x: (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, f ax: (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: (3 3)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, teleph one: 44-(0)1707-294888, fax: 44(0)1707-325777 e-mail: info@hamamatsu.co.uk north europe: hamamatsu photonics norden ab: smidesv ? gen 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 web site www.hamamatsu.com 1000 pf + supply voltage 220 pf 500 v 10 m ? 4.7 k ? * anode cathode pulse outpit 10 k ? * this 4.7 k ? resistor must be connected within 2.5 cm from the tip of the uvtron anode lead. i
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