H11901-20

  • Type: Compact head-on photomultiplier tube module
  • Application: Low-light detection, spectroscopy, medical diagnostics, analytical instruments
  • Window Material: UV-transparent glass
  • Photocathode: Bialkali (Sb-Rb-Cs, high quantum efficiency in UV/blue range)
  • Dynode Structure: Circular-cage, 10 stages
  • Built-in Components: High-voltage power supply (HV circuit) and voltage divider
Parameter Value / Description
Spectral Response 185–700 nm (Peak: ~420 nm)
Cathode Sensitivity Typical 70 μA/lm (at 400 nm)
Anode Sensitivity Min. 50 A/lm (with HV supply)
Gain 1×10⁶ (typical at rated voltage)
Dark Current Max. 5 nA (at rated voltage, 25°C)
Rise Time 2.2 ns (typical)
Operating Voltage DC 900–1250 V (adjustable)
Output Connector BNC (analog signal)
Dimensions 30 mm (W) × 30 mm (H) × 60 mm (L)