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Bio-Rad Laboratories has received US Patent No. 7,683,299, "Extended dynamic range system design using a photomultiplier tube and solid state detector." The patent claims a means for detecting and measuring light emitted from a sample, where the light has a large dynaluminous intensity covering six or more orders of magnitude. The claimed system allows the simultaneous measurement of the emitted light in two intensity ranges using two detectors, one that includes a photomultiplier tube and another that includes a solid-state detector such as a photodiode.

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