Micro-PMT module


H12405 series is the most widespread standard type and has a built-in high-voltage power supply. The H12405 is bialkali photocathode micro PMT module with spectral response range from 300 nm to 650 nm.

Spectral response 300 nm to 650 nm
Peak sensitivity wavelength 420 nm
Photocathode material Bialkali
Window material Borosilicate glass
Effective area 1 mm x 3 mm
Input voltage ±4.5 V to ±5.5 V
Max. Input voltage ±5.5 V
Max. Input current +23.5 mA / -3.5 mA
Max. Average output signal voltage +4 V
Max. Control voltage +1.15 V
Recommended control voltage adjustment range +0.5 V to +1.0 V
Control voltage input impedance 1 MΩ
[Cathode] Luminous sensitivity Min. 50 μA/lm
[Cathode] Luminous sensitivity Typ. 80 μA/lm
[Cathode] Radiant sensitivity Typ. 80 mA/W
[Cathode] Blue sensitivity index 8.0
[Anode] Luminous sensitivity Min. 3.0 x 107 V/lm
[Anode] Luminous sensitivity Typ. 1.6 x 108 V/lm
[Anode] Radiant sensitivity Typ. 160 V/nW
Voltage output depending on PMT dark current Typ. 0.3 mV
Voltage output depending on PMT dark current Max. 3 mV
PMT gain 2.0 x 106
Frequency bandwidth DC to 20 kHz
Current-to-voltage conversion factor 1 V / μA
Output offset voltage ±1 mV
Ripple noise (peak to peak) 1.5 mV
Settling time 10 s

Dimensional outline (Unit mm)

Signal input/output

Cable  Color Signal type
UL1430 AWG26 Black GND
Red Low voltage input (+5 V)
Green Low voltage input (-5 V)
Blue Vref output (+1.2 V)
White Vcont input (+0.5 V to +1.0 V)
RG-174/U - Signal output / Signal GND (Coaxial)

Details of input window

Cross section

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