Photon counter H12775

high-speed

The H12775 is a photon counting head device containing of a 10-mm (1/2") diameter head-on 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 H12775 has a function of over light detection output for indicating the excessive light operating condition. Specifications Photocathode Area Shape : Round Photocathode Area Size : Dia.10 mm Wavelength (Short) : 300 nm Wavelength (Long) : 650 nm Wavelength (Peak) : 420 nm Dimension (W x H x D) : 25.0 x 40.0 x 68.0 mm Input Voltage : +4.75 to +5.25 V Max. Input Voltage : +6 V Max. Input Current : 40 mA Count Senstitivity at 300 nm Typ. : 2.5 x 105 s-1・pW-1 Count Senstitivity at 400 nm Typ. : 4.4 x 105 s-1・pW-1 Count Senstitivity at 500 nm Typ. : 3.6 x 105 s-1・pW-1 Count Senstitivity at 600 nm Typ. : 1.2 x 105 s-1・pW-1 Count Linearity : 5.0 x 106 s-1 Dark Count Typ. : 30 s-1 Dark Count Max. : 100 s-1 Pulse-pair Resolution : 20 ns Output Pulse Width : 10 ns Output Pulse Height Min. : +2.0 (Load resistance 50Ω) V +4.0 (Un-terminated) V Output Pulse Height Typ. : +2.2 (Load resistance 50Ω) V +4.4 (Un-terminated) V Recommended Load Resistance : 50 Ω Signal Output Logic : Positive logic Operating Ambient Temperature : +5 to +40 ℃ Storage Temperature : -20 to +50 ℃ Weight : 79 g