FLAME SENSOR UVtron ® 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 ●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 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 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. ©2007 Hamamatsu Photonics K.K. FLAME SENSOR UVtron ® Type No. Spectral DimenBulb Electrode Response (nm) Weight sional Material Material Outline Symbol (Fig. 2) (g) Feature Maximum Rating Peak Current (mA) (mA) Supply Voltage (V dc) Average A Discharge Current 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 1 UV Glass Ni 3 185 to 260/A 575 3 50 -20 to +125 1 UV Glass Ni 3 185 to 260/A 420 3 50 -20 to +125 2 UV Glass Ni 4 185 to 260/A 420 3 50 -20 to +125 3 UV Glass Ni 1.5 185 to 260/A 400 1 30 -20 to +60 4 UV Glass Ni 1.5 185 to 260/A 500 1 30 -20 to +60 5 UV Glass Ni 2.5 185 to 260/A 400 1 30 -20 to +125 1 UV Glass Mo 3 185 to 300/B 420 5 100 -20 to +125 10 200 -20 to +125 10 200 -20 to +125 For Burner Monitoring Low-voltage operation, standard type Low-voltage, high-current operation High-voltage, high-current operation R259-01 R1868 R2121 6 UV Glass W 4 185 to 280/C 6 UV Glass W 4 185 to 280/C 425 (300G) 575 (400G) 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 3R2868 CATHODE 15 MAX. ANODE TOP VIEW A – A' 20.2 MAX. 11.5±1.0 11±1 20±2 CATHODE 3 ANODE TPT A0038EA 32 MIN. 12 MAX. ANODE 6 (MESH) 72 °C 1 CATHODE 5 × 12 23 ± 1 4 PIN BASE JEDEC No. E9-37 A' UV GLASS BULB ANODE 8 LEAD: 0.65 ± 0.05 CATHODE TPT A0039EA 4±1 8 ± 1 HARD PIN 1 ANODE CATHODE A ANODE 44 MAX. FLEXIBLE LEAD: 0.5 CATHODE 18 MAX. 7 MAX. 38 MIN. 6 MAX. 32 MAX. 26±2 34±2 9.0 ± 0.5 ANODE LEAD CATHODE LEAD 8±1 SIDE VIEW TPT A0023EB Characteristics (at 25 °C) Discharge Discharge Starting Voltage Sustaining Voltage Max. Typ. Sensitivity C Typ. (min-1) Recommended Operating Parameters Background D Min. (min-1) Service LifeE Typ. (hours) Supply Voltage (V dc) Average Discharge Current Socket Quenching F (Sold Separately) Type No. Time Min. (Fig. 3) (V dc) (V dc) 440 330 600 5 10000 500±50 0.3 1 — R244 260 220 600 5 10000 325±25 0.3 1 — R259 260 185 10000 5 10000 325±25 0.3 2 E678-9C 280 240 5000 10 10000 325±25 0.3 2 — R2868 360 300 4000 10 10000 400±25 0.3 2 — R9454 280 230 10000 10 10000 350±25 0.3 1 E678-8F R9533 260 200 200 10 10000 325±25 0.5 1 — 2 2 E678-9C R1868 2 2 E678-9C R2121 240 (170G) 440 (310G) 170 1500 10 10000 310 1500 10 10000 310±30 (220±20G) 500±50 (350±35G) Figure 2: Spectral Response 100 (mA) (ms) R259-01 Figure 3: Sockets (Unit: mm) E678-9C TPT B0035EA E678-8F 35 28.6 10 RELATIVE SENSITIVITY (%) R1753-01 18 23.6 10 24 B 2- 3.2 2- 2.2 13 2.8 2.0 1 17.4 3.4 C 0.1 160 10 A 180 200 220 240 260 280 300 320 11 WAVELENGTH (nm) TACCA0283EA 4R9454 5R9533 TACCA0289EA 6R1868, R2121 13.5 ± 1.0 CATHODE ANODE CATHODE TOP VIEW A – A' ANODE 20.2 MAX. TOP VIEW 9.0 ± 0.5 45 8- 0.70 ± 0.05 HARD PIN 1 4 PIN BASE JEDEC No. E9-37 12 MAX. 4.15 MAX. ANODE MARK (RED) 4±1 8 ± 1 SIDE VIEW ANODE 3 6 1 8 CATHODE ANODE LEAD CATHODE LEAD 8±1 SIDE VIEW TPT A0036EB 72 ° 14-25.71° CATHODE P.C.D. 7.9 ± 0.1 LEAD: 0.65 ± 0.05 ° 15±2 32 MIN. 14 MAX. 18 MAX. 23 ± 1 44 MAX. CATHODE 5 × 10 . 32 MAX. UV GLASS BULB ANODE 7 MAX. A' 10 ± 2 A ANODE 6.4 ± 1.0 CATHODE 20 ± 2 15 M AX 11.9 ANODE ANODE CATHODE BOTTOM VIEW TPT A0035EA TPT A0040EA FLAME SENSOR UVtron ® Figure 4: Recommended Driver Circuits 10 MΩ + 4.7 kΩ* ANODE SUPPLY VOLTAGE CATHODE 220 pF 500 V PULSE OUTPIT i 10 kΩ 1000 pF – * This 4.7 kΩ resistor must be connected within 2.5 cm from the tip of the UVtron anode lead. TPT C0016EA ■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 area 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/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. ●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. 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: [email protected] Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658 E-mail: [email protected] 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: [email protected] 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: [email protected] North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171-41 SOLNA, Sweden, Telephone: (46)8-509-031-00, Fax: (46)8-509-031-01 E-mail: [email protected] 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: [email protected] TPT 1021E02 MAY 2007. 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