The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 1997
Filed:
Mar. 01, 1996
Brian Curtiss, Boulder, CO (US);
Analytical Spectral Devices, Inc., Boulder, CO (US);
Abstract
A spectrophotometric system uses an immersible spectrophotometric probe that can be directly interfaced to a pH/ISE meter for calibration and read-out. The probe contains a light source, a photodetector, and interface circuitry for converting the signal from the photodetector to an output voltage within a predetermined range suitable for the pH/ISE meter (e.g., 0-1.8 volts). The probe housing can also include a sample chamber to provide a predefined optical path from the light source through a portion of the sample fluid to the photodetector. An optical filter can be included in the optical path to allow measurements within a selected wavelength range. The pH/ISE meter receives the output voltage from the probe, applies a calibration function, and displays the resulting value. In the preferred embodiment, the probe is designed as a unitary structure that is plug-compatible with most conventional pH/ISE meters. This allows the present spectrophotometric probe to be used interchangeably with conventional pH probes and other ISE probes.