Patent · US Expired

Nondispersive infrared gas analyzer

US4180732A · kind A · utility

9Cited by

2References

6Claims

0Family size

Assignee

Hartmann & Braun Aktiengesellschaft · DE

Inventors

Walter Fabinski · Kriftel, DE
Udo Deptolla · Nieder-Olm, DE

Key dates

Filing date	Oct 23, 1978
Grant date	Dec 25, 1979
Priority date	—
Expiry date	Oct 23, 1998

Classification

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

Abstract

The sensitivity and selectivity of a two beam analyzer operating with negative filtering and differential absorption-pressure detection is improved by employing differently long cells for the sample gas in the two beam paths, which reduces the effect resulting from overlapping absorption bands of the wanted and of unwanted components in the sample gas.

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