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Product Variations

Specifications

Compact Head-on PMT

Photon Counting Head H7828 Series

The H7828 series are photon counting head devices using a 19 mm (3/4") di-

ameter head-on photomultiplier tube, high-speed photon counting circuit, and

high-voltage power supply circuit. The high voltage supply for photomultiplier

tube and the discrimination level are preset to optimum levels, allowing photon

counting measurement by just connecting a +5 V supply. Despite its compact

size, the effective photosensitive area is as large as 15 mm in diameter, so the

incident light can be collected very efficiently. Compared to other PMT mod-

ules, the H7828 series devices have higher resistance to vibration and shock,

making them suitable for portable or mobile measurement equipment. Two

types of photomultiplier tubes with different spectral response characteristics

are provided for measurement in the visible range or visible to near IR range.

Type No.

H7828

H7828-01

300 nm to 650 nm

300 nm to 850 nm

For visible range

For visible to near IR range

Spectral Response

Features

Parameter

H7828-01

H7828

Input Voltage

Max. Input Voltage

Max. Input Current

Effective Area

Peak Sensitivity Wavelength

Count

Sensitivity

Pulse-pair Resolution

Output Pulse Width

Recommended Load Resistance

Signal Output Logic

Operating Ambient Temperature

Storage Temperature

Weight

+4.5 to +5.5

+6

60

15

1.5

70

30

3.5

3.0

50

Positive logic

+5 to +40

-20 to +50

70

380

1.7

2.1

1.6

1.0

5.9

2000

3500

420

2.1

3.6

2.8

5.0

—

200

500

Unit

V

V

mA

mm

nm

ns

ns

V

Ω

—

°C

°C

g

*1: Random pulse, at 10 % count loss

*2: After 30 minute storage in darkness

*3: With input voltage +5 V, Load resistance 50

Ω and Coaxial cable RG-174/U (450 mm)

300 nm

400 nm

500 nm

600 nm

700 nm

Typ.

Max.

Typ.

Min.

Typ.