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A small, portable, inexpensive instrument for measuring fluorescence lifetimes in optical sensors has been developed, which employs a super-bright blue or red light-emitting diode (LED) as excitation source and a photodiode with a fast high-gain amplifier for the detection of the fluorescence. A time resolution of down to 20 ns can be achieved with a total span of more than 5 μs. Evaluation of the...
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