Photon counter without display H16721-40

high-speed

The H16721 series is a photon counting head device containing a metal package photomultiplier tube having a GaAsP/GaAs photocathode and a thermoelectric cooler. The thermoelectric cooler reduces thermal noise generated from the photocathode which also offers a high quantum efficiency, allowing measurement to be made with a good S/N ratio even at very low light levels. The H16721-40 has high sensitivity on wavelength from 300 nm to 740 nm. The photomultiplier tube is maintained at a constant temperature by monitoring the output from a thermistor installed near the photomultiplier tube and regulating the current to the thermoelectric cooler. Specifications Photocathode Area Shape - Round Photocathode Area Size - Dia.5 mm Wavelength (Short) - 300 nm Wavelength (Long) - 740 nm Wavelength (Peak) - 610 nm Dimension (W x H x D) - 56 mm x 36 mm x 104 mm Input Voltage - +4.5 V to +5.5 V Max. Input Voltage - +6 V Max. Input Current - 50 mA Count Senstitivity at 400 nm Typ. - 5.3 x 105 s-1・pW-1 Count Senstitivity at 500 nm Typ. - 9.0 x 105 s-1・pW-1 Count Senstitivity at 600 nm Typ. - 10.3 x 105 s-1・pW-1 Count Senstitivity at 700 nm Typ. - 8.5 x 105 s-1・pW-1 Count Linearity - 1.5 x 106 s-1 Dark Count Typ. - 100 s-1 Dark Count Max. - 300 s-1 Pulse-pair Resolution - 70 ns Output Pulse Width - 30 ns Output Pulse Height Min. - 3 V Output Pulse Height Typ. - 3.6 V Recommended Load Resistance - 50 Ω Signal Output Logic - Positive logic Operating Ambient Temperature - +5 ℃ to +35 ℃ Storage Temperature - -20 ℃ to +50 ℃ Weight - 395 g