Photon counting head
The H7828 series is a photon counting head device containing a 19 mm (3/4") diameter head-on photomultiplier tube, a 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. Despite its compact size, the effective photosensitive area is as large as 15 mm in diameter, so the incident light can be collected very efficiently. Compared to other PMT modules, the H7828 series has higher resistance to vibration and shock, making them suitable for portable or mobile measurement equipment.
|Photocathode Area Shape||Round|
|Photocathode Area Size||Dia.15 mm|
|Wavelength (Short)||300 nm|
|Wavelength (Long)||650 nm|
|Wavelength (Peak)||420 nm|
|Dimension (W x H x D)||26.0 mm x 50.0 mm x 56.0 mm|
|Input Voltage||+4.5 V to +5.5 V|
|Max. Input Voltage||6 V|
|Max. Input Current||60 mA|
|Count Senstitivity at 300 nm Typ.||2.1 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.||5.0 x 104 s-1・pW-1|
|Count Linearity||1.5 x 106 s-1|
|Dark Count Typ.||200 s-1|
|Dark Count Max.||500 s-1|
|Pulse-pair Resolution||70 ns|
|Output Pulse Width||30 ns|
|Output Pulse Height Min.||3 V|
|Output Pulse Height Typ.||3.5 V|
|Recommended Load Resistance||50 Ω|
|Signal Output Logic||Positive logic|
|Operating Ambient Temperature||+5 ℃ to +40 ℃|
|Storage Temperature||-20 ℃ to +50 ℃|
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