PHOTOMULTIPLIER TUBE R2949 (Low Dark Counts Type of R928) Modified R928, 8 × 6mm Photocathode Area Size Low Dark Counts, Extended Red Multialkali, High Sensitivity For Photon Counting Applications FEATURES Low Dark Counts .
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300cps (at 25°C) Low Dark Current .
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2nA (after 30min.
) Wide Spectral Response .
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185 to 900 nm High Cathode Sensitivity Luminous .
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200µ A/lm Radiant at 400nm .
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68mA/W High Anode Sensitivity (at 1000V) Luminous .
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