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Fiber Optic Probes for pH Measurement
Fiber Optic Probes for pH Measurement
The adhesive films have been treated with a sol-gel formulation, which then have been soaked with a color indicator for a pH measurement. The spectrum of the adhesive film will be transmitted by the optical probes, either by reflection or transmission. Any change in the color may be detected by a change at a specific wavelength. The results generated by classical optical pH sensors are not reliable in solutions with a high ionic content. The formulation used with these adhesive films guarantees reliable pH values even with extremely high or low salinity. The probes may be connected to a tabletop spectrometer, where all the features of the Spectra-Suite software may be used, which allows an easy calibration, reporting the measured values directly in pH, guarantees the proper documentation, and the export of the data to other programs. The probes may also be connected to a portable handheld spectrometer, which uses a simplified software, with a preinstalled calibration. For further evaluation the measurements may be stored on a memory card.

Ocean Optics, USA (02/11/2011)
Mark NTL110-15




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