Abstract

An LED (Light Emitting Diode) - electrode system for on-line measurement of biomass in small scale laboratory fermenters has been developed. The system comprises a high intensity light emitting diode (LED) of 500 mcd luminosity coupled with a photodiode detector. Detector output is amplified and fed to a microprocessor control and logging system. Satisfactory operation has been achieved over 12 months intensive use.

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