FLAME SENSOR UVTRON ®
R9454, R9533
Quick Detection of Flame from Distance,
Compact UV Sensor with High Sensitivity and Wide Directivity,
Suitable for Flame Detectors and Fire Alarms.
The UVTRON R9533 and R9454 are ultraviolet ON/OFF sensors that
utilize the photoelectric effect from metal and gas multiplication. These
devices are sensitive only to UV light in a spectral range of 185 nm to
260 nm. This makes them easy to use since they do not require optical
visible-cut filters. Their electrodes are optimized for ruggedness to resist
mechanical shocks up to 10 times (10000 m/s2) greater than the conven-
tional UVTRONs.
The R9533 is a head-on type (UV light enters through the top of the bulb)
that easily installs into equipment. The R9454 is a side-on type (UV light
enters through the side of the bulb) whose outer appearance resembles
the conventional flame sensor R2868. Both these types utilize a plate
cathode and feature high sensitivity and a wide field of view (directivity).
APPLICATIONS
ꢀ Flame detectors for gas / oil lighters and matches
Left: R9533 Right: R9454
ꢀ Fire alarms
ꢀ Arson watch monitors
ꢀ Combustion monitors for burners
ꢀ Inspection of ultraviolet leakage
ꢀ Detection of discharge
ꢀ Ultraviolet switching
SPECIFICATIONS
GENERAL
Parameter
R9454
R9533
Unit
nm
—
Spectral Response
Window Material
Weight
185 to 260
UV glass
Approx. 1.5
Approx. 2.5
g
MAXIMUM RATINGS
Parameter
Supply Voltage (DC)
Peak Current 1
Average Discharge Current 2
Operating Ambient Temperature
R9454
500
R9533
400
Unit
V
mA
mA
°C
30
1
-20 to +60
-20 to +125
CHARACTERISTICS (at 25 °C)
Parameter
Discharge Starting Voltage (with UV radiation) (DC) Max.
Recommended Operating Voltage (DC)
Background 3
Sensitivity 4
R9454
360
400 25
R9533
280
350 25
Unit
V
V
min-1
min-1
Max.
Typ.
10
4000
10000
NOTE: 1This is the maximum momentary current that can be handled if its full width at half maximum is less than 10 µs.
2If the tube is operated near this or higher, the service life is noticeably reduced. Use the tube within the recommended current values.
3Measured under room illuminations (approximately 500 lux) and recommended operating conditions. Note that these values may increase if the
following environmental factors are present.
1. Mercury lamps, sterilization lamps, or halogen lamps are located nearby. 2. Direct or reflected sunlight is incident on the tube.
3. Electrical sparks such as welding sparks are present. 4. Radiation sources are present. 5. High electric field (including static field) generates across the tube.
4These are representative values for a wavelength of 200 nm and a light input of 10 pW/cm2. In actual use, the sensitivity will vary with the wavelength
of the ultraviolet radiation and the drive circuitry employed.
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.
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