Patent · US Expired

Calibration of nondispersive infrared photometer

US5003175A · kind A · utility

7Cited by

8References

5Claims

0Family size

Assignee

Hartmann & Braun Aktiengesellschaft · DE

Inventors

Walter Fabinski · Kriftel, DE
Georg Taubitz · Oberursel, DE
Joachim Hose von Wolfframsdorff · Seeheim-Jugenheim, DE

Key dates

Filing date	Jun 1, 1989
Grant date	Mar 26, 1991
Priority date	—
Expiry date	Jun 1, 2009

Classification

Technology area (CPC G)Physics
CPC primaryG01N2201/1285
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The photometer is calibrated by using a permanently built-in installation of four, similarly configured chambers in a good heat conducting carrier which is slidably interposed between sample and reference chambers on one hand and the detection structure on the other hand. One pair of these chambers is placed in the paths during measurement and is filled with inert gas, the other pair has one chamber filled with calibration gas, the other one with inert gas. All chambers are closed with similar windows.

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