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Harvard Apparatus Introduces an Optical Biosensor
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Harvard Apparatus has introduced a Fluorescence-based optical Biosensor. In contrast to ion-sensitive chemosensors, it uses a controlled optical source that emits light signals at specified frequencies which excite an ion-specific sensor spot in contact with the test medium. Changes in the parameter of interest are reported as a proportional change in some characteristic (intensity, phase shift, etc.) of the fluorescence. Because they are inherently self-referencing, this detection technology eliminates the potential for measurement error arising from changes in sample properties (i.e. flow rate, viscosity, etc.) over the duration of an experiment. This ensures stable, drift-free calibration and hence reliable measurements throughout the lifespan of a sensing element. Unlike polarographic oxygen electrodes, this technology is non ion-consumptive. These easy-to-use biosensors are free of the maintenance complications inherent in traditional chemosensing: requiring only cleaning and dry storage, there is no need for electrolyte, membrane changes, or pre-polarization of the electrode amplifier.
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Keywords : Biosensor Fluorescence Harvard Apparatus Optical Biosensor Screening Products
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