Toxic gas monitor having automatic calibration

Details Toxic gas monitor having automatic calibration Toxic gas monitor having automatic calibration

1977-11-03

1979-05-01

Swisher, S. Clement

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

G01N 3100

Patent

active

041517385

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.

REFERENCES:
patent: 3441863 (1969-04-01), Moriyaso
patent: 3504521 (1970-04-01), Luckers
patent: 3516002 (1970-06-01), Hillis
patent: 4032856 (1977-06-01), Goldner

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