Toxic gas monitor having automatic calibration
US4151738A · kind A · utility
19Cited by
4References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1977 |
| Grant date | May 1, 1979 |
| Priority date | — |
| Expiry date | Nov 3, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0062
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas monitor for monitoring the concentration of particular atmospheric constituent includes a sensor and a signal processor that provides concentration-indicating output signals in response to successive samples admitted to the sensor. The processor multiplies the sensor signals by a calibration signal. It automatically recalibrates the monitor by periodically causing a sample having a standard concentration to be admitted to the sensor and adjusting the calibration signal to provide a corresponding predetermined output signal level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.