FLAME SENSOR UVTRON is an ultraviolet ON / OFF sensor 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) GSolar Blind Characteristics (Not Sensitive to Visible and Infrared Light) 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. ©2010 Hamamatsu Photonics K.K.

FLAME SENSOR UVTRON ® Parameter Dimensional Outline Electrode Material Spectral Response / Symbol (Fig. 1) Maximum Rating Average Discharge Current A Operation Ambient Temperature Discharge Starting Voltage (DC) Max. Discharge Sustaining Voltage (DC) Typ. Recommended Operating Parameters Average Discharge Current Quenching Time F Suitable Socket (Sold Separately) (Fig. 3) 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...

Figure 2: Dimensional Outline (Unit: mm) 1R244, R259, R259-01 ANODE LEAD SIDE VIEW SIDE VIEW ANODE LEAD CATHODE LEAD BOTTOM VIEW Figure 4: Recommended Driver Circuits Figure 3: Suitable Sockets (Unit: mm) Sold Separately E678-9C SIDE VIEW SUPPLY VOLTAGE PULSE OUTPUT * This 4.7 kΩ resistor must be connected within 2.5 cm from the tip of the UVTRON anode lead. TPT C0016EA

FLAME SENSOR UVTRON ® IPRECAUTIONS FOR USING THE UVTRON GUVTRON 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...