Stanford Research SR400 Dual-Channel Gated Photon Counter
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Stanford Research SR400 Dual-Channel Gated Photon Counter

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Stock # 93755-1
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Stanford Research SR400 Dual-Channel Gated Photon Counter

  • Two Independent Counting Channels
  • Count Rates to 200 MHz
  • 5 ns Pulse-Pair Resolution
  • Gated and Continuous Modes
  • Built-In Discriminators
  • Gate and Discriminator Outputs


The SR400 Dual-Channel Gated Photon Counter offers a convenient, integrated approach to photon counting that avoids the complexity and expense of older counting systems. No longer is it necessary to mix and match amplifiers, discriminators, gate generators and counters. The SR400 combines all these modules into a single, integrated, microprocessor-controlled instrument. Complex measurement tasks such as background subtraction, synchronous detection, source compensation, and pile-up correction can all be performed easily with the SR400. The SR400 has two independent channels that can count at rates up to 200 MHz. Different counting modes allow you to count for a fixed amount of time, until a certain number of counts have been received, or for a fixed number of triggers. Each counting channel has its own gate generator which provides counting gates as short as 5 ns or as long as 1s. The gates can be set in a fixed position relative to the trigger signal, or scanned to measure lifetimes or recover time-varying waveforms.

Product Family: SR400

Important Notice: Please note that any additional items included with this equipment such as accessories, manuals, cables, calibration data, software, etc. are specifically listed in the above stock item description and/or displayed in the photos of the equipment. Please contact one of our Customer Support Specialists if you have any questions about what is included with this equipment or if you require any additional information.

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Stanford Research SR400 Dual-Channel Gated Photon CounterStanford Research SR400 Dual-Channel Gated Photon CounterStanford Research SR400 Dual-Channel Gated Photon Counter
Stanford Research SR400 Dual-Channel Gated Photon Counter

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