 | The CH345 is a photon counting head device consisting of a head-on photomultiplier tube,a high-voltage power supply and a comparative shaping circuit.This device is mainly used for weak light detection and precise measurement in the field of biology,medicine,chemistry and so on.The product is preset to optimum values,allowing photon counting measurement by just connecting a supply. |
| Catalog【428 KB/PDF】 |
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Specifications (25℃)
Parameter | Value | Unit | |||
Input Voltage | +4.75～+5.25 | V | |||
Max. Input Current | 100 | mA | |||
Effective Area | Φ22 | mm | |||
Spectral Response | 300～650 | nm | |||
Peak Sensitivity Wavelength | 420 | nm | |||
Peak Sensitivity Wavelength | Typ. | 300nm | 3.1×105 | s-1·pW-1 | |
400nm | 4.3×105 | ||||
500nm | 4.1×105 | ||||
600nm | 9.2×104 | ||||
Count Linearity | No corrected | 6×106 | s-1 | ||
Corrected | 20×106 | ||||
Dark Count | Typ. | 100 | s-1 | ||
Max. | 200 | ||||
Consistency | ±10% | -- | |||
Instability for 8 hours（CV） | Typ. | 1% | -- | ||
Signal Output Logic | Positive TTL | -- | |||
Output Pulse Height | Min. | 2.2 | V | ||
Typ. | 2.4 | ||||
Output Pulse Width | Typ. | 9 | ns | ||
Pulse-Pair Resolution | Typ. | 17 | ns | ||
Recommended Load Resistance | 50 | Ω | |||
Operating Ambient | Temperature | +5～+40 | ℃ | ||
Humidity | Max. | 90%RH | -- | ||
Storage Ambient | Temperature | -20 ~ +50 | ℃ | ||
Humidity | Max. | 93%RH | -- | ||
Weight | 280 | g | |||