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Photon counting modules

C11202 series

Single pixel photon counting
module for low-light-level detection

www.hamamatsu.com

1

Structure

Parameter

Symbol

C11202-050

C11202-100

Unit

Internal photodetector

-

Single-pixel photon counter

-

Photoseinsitive area size

-

ϕ

50

ϕ

100

μ

m

Absolute maximum ratings

Parameter

Symbol

Condition

C11202-050

C11202-100

Unit

Supply voltage

Vs

±

6

V

Operating temperature

Topr

No condensation

-10 to +40

°

C

Storage temperature

Tstg

No condensation

-20 to +70

°

C

Note:  Exceeding the absolute maximum ratings even momentarily may cause a drop in product quality. Always be sure to use the 

product within the absolute maximum ratings.

Electrical and optical characteristics (Typ. Ta=25 °C, 

λ

=

λ

p, Vs=±5 V, unless otherwise noted)

Parameter

Symbol

Condition

C11202-050

C11202-100

Unit

Min.

Typ.

Max.

Min.

Typ.

Max.

Spectral response range

λ

320 to 900

320 to 900

nm

Peak sensitivity wavelength

λ

p

-

450

-

-

450

-

nm

Element temperature 

(set temperature)

Td

-

-20

-

-

-20

-

°

C

Photon detection e

  ciency

PDE

60

70

-

60

70

-

%

Dark count

-

-

7

25

-

30

100

cps

Afterpulse probability

-

100 ns to 500 ns

-

0.1

-

-

0.1

-

%

Comparator output

-

TTL compatible

TTL compatible

-

Maximum count rate

-

-

30

-

-

20

-

Mcps

The C11202 series is a single-photon counting module capable of detecting low light levels. The C11202 series is made up of 
a thermoelectrically cooled single-pixel photon counter (SPPC), an ampli

fi

 er, a comparator, a high-voltage power supply circuit, 

and a temperature controller. The photosensitive area is available in two sizes of 

ϕ

50 

μ

m and 

ϕ

100 

μ

m, and such small photo-

sensitive areas o

 er a low dark count. Modules operate just by connecting them to an external power supply (±5 V).

Low-light-level measurement

High sensitivity in the short wavelength range

Low afterpulse

Fluorescence measurement

Particle diameter measurement

Low dark count

Analytical instrument

Features

Applications

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