Alcohol concentration sensor testing apparatus
US5205151A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1991 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | May 22, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/2852
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for testing an alcohol concentration sensor used in measuring an alcohol concentration of a fluid containing alcohol. The alcohol concentration sensor includes a capacitive probe having a capacity dependent upon the alcohol concentration of the fluid, and a circuit sensitive to the capacity of the capacitive probe for producing an output signal indicative of a sensed alcohol concentration. The apparatus comprises a plurality of capacitors having different capacities each corresponding to a predetermined alcohol concentration. A selected one of the capacitors is connected in parallel with the capacitive probe. When the selected capacitor is connected with the capacitive probe, the output signal is read.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.