H11901-20

  • High-sensitivity PMT with bialkali photocathode
  • Thermoelectric cooling system (-20°C below ambient)
  • Built-in discriminator circuit
  • USB 2.0 interface
  • Designed for ultra-low-light detection in scientific and industrial applications
Parameter Specification
Detector Type Bialkali PMT (Sb-K-Cs)
Spectral Range 300-650 nm
Peak Wavelength 420 nm
QE @ Peak 25%
Dark Count Rate <50 cps (cooled)
Max Count Rate 5 MHz
Timing Resolution 3 ns FWHM
Cooling Capacity ΔT = -20°C (max)
Output Signals TTL (photon), Analog (0-5V)
Power Supply 12V DC, 1.5A max
Interface USB 2.0
Operating Temp. 0°C to +40°C
Dimensions φ60 × 50 mm
Weight 300 g