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Photon counting head

H11870-03

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The H11870 series is a wide sensitive area photon counting head device containing a 25 mm (1") diameter head-on photomultiplier tube, a high-voltage power supply circuit and a photon counting 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. The H11870 series has a function of over light detection output for indicating the excessive light operating condition.
A mount flange (E6264) is provided as an option for easy installation to measurement equipment.

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Specifications

Photocathode Area Shape Round
Photocathode Area Size Dia.22 mm
Wavelength (Short) 300 nm
Wavelength (Long) 850 nm
Wavelength (Peak) 420 nm
Dimension (W x H x D) φ34.0 x 114 mm
Input Voltage +5 V
Max. Input Voltage +6 V
Max. Input Current 100 mA
Count Senstitivity at 300 nm Typ. 2.1 x 105 s-1・pW-1
Count Senstitivity at 400 nm Typ. 2.5 x 105 s-1・pW-1
Count Senstitivity at 500 nm Typ. 2.0 x 105 s-1・pW-1
Count Senstitivity at 600 nm Typ. 1.3 x 105 s-1・pW-1
Count Senstitivity at 700 nm Typ. 7.8 x 104 s-1・pW-1
Count Linearity 6.0 x 106 s-1
Dark Count Typ. 5000 s-1
Dark Count Max. 15000 s-1
Pulse-pair Resolution 18 ns
Output Pulse Width 9 ns
Output Pulse Height Min. +2 (at 50Ω) V
+4 V
Recommended Load Resistance 50 Ω
Signal Output Logic Positive logic
Operating Ambient Temperature +5 to +40 ℃
Storage Temperature -20 to +50 ℃
Weight 140 g

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