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:
Jan. 25, 1994
Filed:
Apr. 17, 1992
Fuji Electric Co., Ltd., Kawasaki, JP;
Abstract
A small, light and portable sensor for detecting and quantifying a harmful high molecular weight substance present in a sample gas in trace amounts is herein disclosed. In the sensor, light and heavy ions are formed by ionizing molecules of the sample gas components in an ionization region. The heavy ions are formed through an ion-molecule reaction. The passage of ions through an ion-passage control region is controlled by directly or indirectly controlling the electric field established between a central electrode and a counter electrode The ions which pass through the control region are collected on a collector electrode. The high molecular weight substance is detected and quantified on the basis of the output from the collector electrode.