Patent · US Expired

Process and device for measuring a gas medium with a chemical sensor

US5569838A · kind A · utility

27Cited by

9References

18Claims

0Family size

Assignee

Testo AG · DE

Inventors

Axel Broedel · Lenzkirch, DE
Thomas Springmann · Kirchzarten, DE
Reinhold Munch · Glückstadt, DE
Armin Bader · Bräunlingen, DE

Key dates

Filing date	Mar 6, 1995
Grant date	Oct 29, 1996
Priority date	—
Expiry date	Mar 6, 2015

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T436/208339
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention relates to a process and a device for measuring a gas medium with a chemical sensor that has a nominal measuring range. The chemical sensor is exposed to a gas mixture consisting of sample gas stream and dilution gas stream. In order to ensure that the chemical sensor always works within its nominal measuring range, the dilution ratio is readjusted. According to the invention, the dilution ratio is determined by substance concentration measurement of a defined substance component.

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