Tests gauge LED sensors for fuel-dye measurements

Certain classes of diesel fuel are dyed red under regulations of the US Environmental Protection Agency and Internal Revenue Service. The goals of these regulations are to minimize emissions and ensure tax-exempt fuel is not used on public roadways.This article reports on development of a low-cost, rugged sensor for measuring fuel-dye concentrations that can be mounted on a pipeline sight glass at fuel refineries and terminals.Studies conducted in this development used three different light-emitting diode/photodiode sensors to measure Solvent Red 26 in kerosine and Solvent Red 164 in diesel at concentrations ranging 0-43 mg/l. The sensors were tested with three different types of sample c...

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