Photon counting head


The H9319 series photon counting heads are designed to perform photon counting by just connecting to a PC. The H9319 series includes a 25 mm (1") diameter head-on photomultiplier tube, a photon counting circuit, a high-voltage power supply circuit, counter and a microprocessor. Data transfer, measurement time and other necessary adjustments can be controlled by commands from the PC through the RS-232C interface. Since the H9319 series performs linearity correction by the internal microprocessor, it provides excellent count linearity within a range of +/-1 % at 20 x 106 s-1.


Photocathode Area Shape Round
Photocathode Area Size Dia.22 mm
Wavelength (Short) 300 nm
Wavelength (Long) 650 nm
Wavelength (Peak) 420 nm
Dimension (W x H x D) Dia.35 mm x 120.0 mm
Input Voltage +4.75 V to +5.25 V
Max. Input Voltage 6 V
Max. Input Current 60 mA
Count Senstitivity at 300 nm Typ. 2.3 x 105 s-1・pW-1
Count Senstitivity at 400 nm Typ. 4.1 x 105 s-1・pW-1
Count Senstitivity at 500 nm Typ. 3.4 x 105 s-1・pW-1
Count Senstitivity at 600 nm Typ. 5.7 x 104 s-1・pW-1
Count Linearity 2.0 x 107 s-1
Dark Count Typ. 150 s-1
Dark Count Max. 300 s-1
Operating Ambient Temperature +5 ℃ to +50 ℃
Storage Temperature -20 ℃ to +50 ℃
Weight 280 g

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