R1868 HAMAMATSU [Hamamatsu Corporation], R1868 Datasheet

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R1868

Manufacturer Part Number
R1868
Description
FLAME SENSOR
Manufacturer
HAMAMATSU [Hamamatsu Corporation]
Datasheet
1.R1868.pdf (4 pages)
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.
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.
Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office.
FLAME SENSOR
UVtron
GCapability of Detecting Very Weak Ultraviolet Rays
GNot Sensitive to Visible and Infrared Light
GHigh Reliability and long service life
GHigh Speed Response (A Few Milliseconds)
GLow Current Operation
GCompact and Lightweight
GCombustion Monitoring Apparatus for Gas and Oil
GFire Alarm Apparatus
GArson Watch Monitors
GPhotoelectronic Counter
GDetection of Ultraviolet Ray Leakage
GDetection of Discharge Phenomenon
(from 1 pW)
(Solar Blind Characteristics)
(10 000 hours of Continual Discharge Operation)
Burner
FEATURES
APPLICATIONS
®

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R1868 Summary of contents

Page 1

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 ...

Page 2

... For Burner Monitoring Low-voltage operation, 1 R259-01 standard type Low-voltage, 6 R1868 high-current operation High-voltage, 6 R2121 high-current operation 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. ...

Page 3

... E678-9C 0.3 2 — 0.3 2 — 0.3 1 E678-8F 0.5 1 — E678- E678-9C E678- 2 TACCA0283EA 6R1868, R2121 20.2 MAX. HARD PIN 4 PIN BASE 1 JEDEC No. E9-37 ANODE MARK (RED) ANODE 3 72 ° 1 ANODE 11.9 Type No. R244 R259 R1753-01 R2868 R9454 R9533 R259-01 R1868 R2121 TACCA0289EA CATHODE 6 8 CATHODE ...

Page 4

UVtron FLAME SENSOR Figure 4: Recommended Driver Circuits 10 MΩ 4.7 kΩ* + 220 pF SUPPLY VOLTAGE 500 V – * This 4.7 kΩ resistor must be connected within 2.5 cm from the tip of the UVtron anode lead. IPRECAUTIONS ...

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