Differential compensated vapor sensor
US6973819B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2003 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | Dec 15, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/007
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Vapor sensing systems and methods are disclosed. An appliance such as a gas water heater, clothes dryer, and the like can be associated with a controller for controlling the appliance. A vapor sensor is also associated with the appliance, such that the vapor sensor comprises an active sensor and an error sensor, wherein the active sensor generates an active signal and the error sensor generates an error signal. An amplifier is also associated with the vapor sensor, such that the amplifier subtracts the error signal from the active signal to generate a compensated signal indicative of the presence of an ignitable vapor within a vicinity of the appliance and thereby instruct the controller to shut down the appliance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.