photon counter
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In stockTime Tagger Q420
Time Tagger Q400 is a PCIe ¾ length card that works within an x64 Linux computer. Four count inputs and a fifth input for a frame or synchronisation input.
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In stockTime Tagger Q425
PXIe Time Tagger, 8 channels + frame counter, 5 ps RMS precision, 0.5 ps resolution, 4 ns dead time.