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:
Sep. 05, 2000
Filed:
Jan. 26, 1998
Ruey-Long Tang, Hacienda Heights, CA (US);
Winston Z Ho, Hacienda Hts., CA (US);
Other;
Abstract
An on-site monitor is disclosed for providing automatic measurements of chemical concentrations in a liquid or gaseous environment. The opto-electronic monitor has an extended probe, which can be inserted into the liquid or to be in contact with the ambiance, comprising a indicator chamber for continuously supplying fresh indicator material, a light source, and a detector. The light source and the detector are either embodied outside of liquid or into the extended plastic probe inside the liquid. A delivery unit, which is activated by a timer, delivers a small amount of indicator material into the liquid or a sampling cavity. The indicator material reacts with the ions in the liquid automatically. The light source has a wavelength which matches with the indicator's absorption wavelength and the detector measures the transmission (or reflection) through the indicator material or solution. The optical signal is converted into an electrical signal, calibrated with a known standard, and then displayed on an LED digital meter. The invention has the advantage of automatically and continuously measuring the chemicals on-site with self-powered, low maintenance, and simple operation.