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Photon Counters  
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SR400 Dual Gated Photon Counter
  • Two independent counting channels
  • Count rates to 200 MHz
  • 5 ns pulse-pair resolution
  • Gated and continuous modes
  • Time-resolved counting
SR430 Multi-Channel Scaler/Averager
  • 5 ns to 10 ms bin width
  • Count rates up to 100 MHz
  • 1k to 32k bins per record
  • Built-in discriminator
  • No interchannel dead time

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