Photon counting head
The H11890 series is a compact photon counting head consisting of a metal package photomultiplier tube along with a high speed photon counting circuit and a high-voltage power supply unit. The high voltage supply for the photomultiplier tube and the discriminator level are preset to optimum values, allowing photon counting measurement by just connecting to a PC. Photon counting measurement data transfer, counter gate time and other necessary adjustments are controlled by commands from the PC through the USB interface.
|Photocathode Area Shape||Round|
|Photocathode Area Size||Dia.8 mm|
|Wavelength (Short)||230 nm|
|Wavelength (Long)||870 nm|
|Wavelength (Peak)||400 nm|
|Dimension (W x H x D)||22.0 x 40.0 x 48.0 mm|
|Input Voltage||USB Bus Power V|
|Max. Input Voltage||6 V|
|Max. Input Current||50 mA|
|Count Senstitivity at 300 nm Typ.||2.7 x 105 s-1・pW-1|
|Count Senstitivity at 400 nm Typ.||3.6 x 105 s-1・pW-1|
|Count Senstitivity at 500 nm Typ.||2.8 x 105 s-1・pW-1|
|Count Senstitivity at 600 nm Typ.||2.0 x 105 s-1・pW-1|
|Count Senstitivity at 700 nm Typ.||1.2 x 105 s-1・pW-1|
|Count Senstitivity at 800 nm Typ.||3.0 x 104 s-1・pW-1|
|Count Linearity||5.0 x 106 s-1|
|Dark Count Typ.||600 s-1|
|Dark Count Max.||1000 s-1|
|Pulse-pair Resolution||20 ns|
|Operating Ambient Temperature||+5 to +40 ℃|
|Storage Temperature||-20 to +50 ℃|
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