Heated infrared gas analyzer using a pyroelectric infrared sensor
US4950900A · kind A · utility
11Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1989 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Mar 8, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0231
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An infrared gas analyzer using a pyroelectric infrared sensor, which includes a heating unit for heating the infrared sensor, a heating sensor for detecting its heating temperature and a temperature sensor for detecting the ambient temperature of the infrared sensor, and controls the heating unit so as to retain the ambient temperature of the infrared sensor at a constant so that the output error is small irrespective of the change in ambient temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.