Datasheet > R2868

R2868

更新时间： 2024-11-15 22:24:47

品牌	Logo	应用领域
HAMAMATSU		传感器
页数	文件大小	规格书
2页	146K
描述
FLAME SENSOR UV TRON

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FLAME SENSOR

UV TRON^®R2868

Quick Detection of Flame from Distance,

Compact UV Sensor with High Sensitivity and Wide Directivity,

Suitable for Flame Detectors and Fire Alarms.

HamamatsuR2868isaUVTRONultravioletdetectorthatmakes

use of the photoelectric effect of metal and the gas multiplication

effect. It has a narrow spectral sensitivity of 185 to 260 nm, being

completely insensitive to visible light. Unlike semiconductor

detectors, it does not require optical visible-cut filters, thus

making it easy to use.

In spite of its small size, the R2868 has wide angular sensitivity

(directivity) and can reliably and quickly detect weak ultraviolet

radiations emitted from flame due to use of the metal plate

cathode (eg. it can detect the flame of a cigarette lighter at a

distance of more than 5 m.).

The R2868 is well suited for use in flame detectors and fire

alarms, and also in detection of invisible discharge phenomena

such as corona discharge of high-voltage transmission lines.

NOTES:

APPLICATIONS

1) This is the maximum momentary current that can be handled if its full width

at half maximum is less than 10 µs.

2) Ifthetubeisoperatednearthisorhigher,theservicelifeisnoticeablyreduced.

Use the tube within the recommended current values.

● Flame detectors for gas/oil lighters and matches

● Fire alarms

3) Measuredunderroomilluminations(approximately500lux)andrecommended

operating conditions. Note that these values may increase if the following

● Combustion monitors for burners

● Inspection of ultraviolet leakage

● Detection of discharge

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.

● Ultraviolet switching

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.

GENERAL

4) These 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.

Parameters

Spectral Response

Rating

185 to 260

UV glass

Units

—

Window Material

Weight

Figure 1: UV TRON’s Spectral Response and Various

Light Sources

Approx. 1.5

See Fig. 3

Dimensional Outline

—

TPT B0009EA

100

MAXIMUM RATINGS

UV TRON s

SPECTRAL

RESPONSE

Parameters

Rating

Units

Vdc

Supply Voltage

400

Peak Current ¹⁾

Average Discharge Current ²⁾

SUNLIGHT

Operating Temperature

-20 to +60

°C

CHARACTERISTICS (at 25°C)

GAS

TUNGSTEN

FLAME

LIGHT

Parameters

Discharge Starting Voltage (with UV radiation)

Recommended Operating Voltage

Recommended Average Discharge Current

Background ³⁾

Rating

280

Units

Vdc Max.

Vdc

325±25

100

200

300

400

500

600

700

800

900

µA

cpm Max

cpm Typ.

WAVELENGTH (nm)

VISIBLE

Sensitivity ⁴⁾

5000

ULTRAVIOLET

INFRARED

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.

中文翻译

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R2868_15	HAMAMATSU	获取价格	FLAME SENSOR UVTRON
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R289H025126M3035	EPCOS	获取价格	Aluminum Electrolytic Capacitor, Polarized, Aluminum, 25V, 20% +Tol, 20% -Tol, 12000uF
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