Patent · US Expired

Radiation detection and receiving in nondispersive infrared gas analyzer

US4373137A · kind A · utility

7Cited by

3References

3Claims

0Family size

Assignee

Hartmann & Braun Aktiengesellschaft · DE

Inventors

Walter Fabinski · Kriftel, DE
Udo Deptolla · Nieder-Olm, DE
Margareta Ascherfeld · Oberursel, DE

Key dates

Filing date	Jun 13, 1980
Grant date	Feb 8, 1983
Priority date	—
Expiry date	Jun 13, 2000

Classification

Technology area (CPC G)Physics
CPC primaryG01N21/61
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The chopped infrared radiation leaving a measuring and sample gas chamber in an infrared gas analyzer is passed through and into two serially arranged detection chambers which are connected to a differential pressure chamber with capacitive pickup. The chambers are filled with gas of the type whose concentration, in the sample gas, is to be detected. One of the detector chambers contains a thin black wire, a diaphragm on the outside may shield an adjustable portion of that wire from radiation. The wire absorbs all radiation it intercepts and heats the environment.

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