Patent · US Expired

Infrared gas analyzer

US4682031A · kind A · utility

6Cited by

2References

3Claims

0Family size

Assignee

Hartmann & Braun Aktiengesellschaft · DE

Inventors

Walter Fabinski · Kriftel, DE
Werner Schaefer · Hofheim, DE

Key dates

Filing date	Apr 25, 1986
Grant date	Jul 21, 1987
Priority date	—
Expiry date	Apr 25, 2006

Classification

Technology area (CPC G)Physics
CPC primaryG01N21/37
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A infrared gas analyzer having measuring and reference chambers and receiving chambers respectively disposed on radiation exit sides of the measuring and reference chambers and being filled with a particular gas; a pressure communicating duct system including a particular chamber interconnects the two receiving chambers is partitioned by a foil of polyvinylidenfluoride being piezo electrically effective to generate an electrical signal on account of a pressure differential between the two receiving chambers, as indication of the concentration of the measuring gas, i.e., host gas that flows through the measuring chamber.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.