Quality Control
We are actively taking measures to improve product quality levels.


Why Hamamatsu?


Our Company

( )

Select your region and country.

Photon counting head



The H12525 series is a photon counting head device containing a 13 mm (1/2") diameter side-on photomultiplier tube, high-speed photon counting circuit, and a high-voltage power supply circuit. The high voltage supply for photomultiplier tube and the discrimination level are preset to optimum values, allowing photon counting measurement by just connecting a +5 V supply.

If you like the product on this page, save it to your wishlist.


Photocathode Area Shape Square
Photocathode Area Size 3.7 x 13 mm
Wavelength (Short) 185 nm
Wavelength (Long) 750 nm
Wavelength (Peak) 420 nm
Dimension (W x H x D) 19.0 x 53.2 x 50.8 mm
Input Voltage +4.75 to +5.25 V
Max. Input Voltage 6 V
Max. Input Current 40 mA
Count Senstitivity at 300 nm Typ. 3.3 x 105 s-1・pW-1
Count Senstitivity at 400 nm Typ. 4.2 x 105 s-1・pW-1
Count Senstitivity at 500 nm Typ. 3.0 x 105 s-1・pW-1
Count Senstitivity at 600 nm Typ. 1.2 x 105 s-1・pW-1
Count Senstitivity at 700 nm Typ. 1.9 x 104 s-1・pW-1
Count Linearity 2.0 x 106 s-1
Dark Count Typ. 50 s-1
Dark Count Max. 100 s-1
Pulse-pair Resolution 20 ns
Output Pulse Width 10 ns
Output Pulse Height Min. 2.0 (Load resistance 50 Ω) V
4.0 (Un-terminated) V
Output Pulse Height Typ. 2.2 (Load resistance 50 Ω) V
4.4 (Un-terminated) V
Recommended Load Resistance 50 Ω
Signal Output Logic Positive logic
Operating Ambient Temperature +5 to +50 ℃
Storage Temperature -20 to +50 ℃
Weight 110 g

Contact us for more information.

  • Literature
  • Price
  • Delivery
  • Custom order
  • Support
  • Other

Contact us

Recommended products