The H12386 series is a photon counting head device consisting of a metal package photomultiplier tube, along with 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.
The H12386 series has also over light detection function to output a signal at the state that an output count falls by excessive incident light. By this signal, measurement data can be judged that it is normal or not.

Specifications
• Photocathode Area Shape : Round
• Photocathode Area Size : Dia.8 mm
• Wavelength (Short) : 185 nm
• Wavelength (Long) : 700 nm
• Wavelength (Peak) : 400 nm
• Dimension (W x H x D) : 30.0 mm x 22.0 mm x 54.0 mm
• Input Voltage : +4.75 V to +5.25 V
• Max. Input Voltage : 6 V
• Max. Input Current : 40 mA
• Count Senstitivity at 200 nm Typ. : 9.7 x 104 s-1・pW-1
• Count Senstitivity at 300 nm Typ. : 3.7 x 105 s-1・pW-1
• Count Senstitivity at 400 nm Typ. : 4.9 x 105 s-1・pW-1
• Count Senstitivity at 500 nm Typ. : 3.7 x 105 s-1・pW-1
• Count Senstitivity at 600 nm Typ. : 1.1 x 105 s-1・pW-1
• Count Senstitivity at 700 nm Typ. : 7.7 x 103 s-1・pW-1
• Count Linearity : 5.0 x 106 s-1
• Dark Count Typ. : 50 s-1
• Dark Count Max. : 100 s-1
• Pulse-pair Resolution : 20 ns
• Output Pulse Width : 10 ns
• Output Pulse Height Min. : 2 V
• Output Pulse Height Typ. : 2.2 V
• Recommended Load Resistance : 50 Ω
• Signal Output Logic : Positive logic
• Operating Ambient Temperature : +5 ℃ to +40 ℃
• Storage Temperature : -20 ℃ to +50 ℃
• Weight : 61 g

Parameter Name	Parameter Value
Type	pulse preset photon
Display	analog
Applications	industrial
Other characteristics	high-speed