Method and apparatus for calibrating a gas detector sensor
US5672806A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1994 |
| Grant date | Sep 30, 1997 |
| Priority date | — |
| Expiry date | Oct 31, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0063
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved method and apparatus for calibrating a gas sensor which exhibits a change in electrical characteristics in response to exposure to a gas. The apparatus comprises a resistor array and a chart. The chart comprises a list of predetermined resistor combinations corresponding to a range of output levels for the sensor. The resistor array is coupled to the output of the sensor. When exposed to a gas, the sensor exhibits a change in conductivity producing an output which generates an output signal with the resistor array. The level of the output signal is measured. The measured level is then compared to predetermined values on the chart which also lists the appropriate resistor combination for each value or range of values. The resistor combination is then set as indicated by the chart.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.