Humidity sensor and method of using the humidity sensor

Details Humidity sensor and method of using the humidity sensor Humidity sensor and method of using the humidity sensor

2007-05-01

2007-05-01

Cygan, Michael (Department: 2855)

Measuring and testing

Gas analysis

Moisture content or vapor pressure

Reexamination Certificate

active

10857495

ABSTRACT:
A humidity-sensitive porous layer (13) of a humidity-sensitive element section (3) of a humidity sensor (1) is formed of a crystalline phase oxide grains such as Al2O3—SnO2—TiO2and of a glass phase such as silicate glass covering the crystalline phase. The glass phase contains an alkali metal oxide and/or alkaline earth metal oxide such as Li2O. The humidity sensitive porous layer (13) assumes a skeletal structure that is formed of crystalline phase oxide grains covered or coated with the glass phase. A heater (17) of the humidity sensor is controlled to heat the humidity-sensitive element section (3) at a temperature ranging from 500° C. to 800° C. so as to clean off the humidity-sensitive element section while an internal combustion engine is running and exhausting fouling substances. Measurement of Humidity in an exhaust gas exhausted from an exhaust gas purifying apparatus of an internal combustion engine is carried out by using the humidity sensor (1), so long as the exhaust gas temperature does not exceed 100° C. regardless of whether or not the engine is running.

REFERENCES:
patent: 3161056 (1964-12-01), Faus
patent: 3369880 (1968-02-01), Mochel
patent: 4245506 (1981-01-01), Meiklejohn
patent: 4326414 (1982-04-01), Terada et al.
patent: 4481813 (1984-11-01), Tanei et al.
patent: 4500940 (1985-02-01), Kuisma et al.
patent: 4656455 (1987-04-01), Tanino et al.
patent: 4752855 (1988-06-01), Fedter et al.
patent: 4797605 (1989-01-01), Palanisamy
patent: 4801211 (1989-01-01), Yagi et al.
patent: 4938928 (1990-07-01), Koda et al.
patent: 4970122 (1990-11-01), Palanisamy
patent: 6812821 (2004-11-01), Fujita et al.
patent: 2001/0025484 (2001-10-01), Ueno et al.
patent: 05010910 (1983-01-01), None
patent: 060194346 (1985-10-01), None
patent: 2003-91840 (2003-04-01), None

Affiliated with

Also associated with

Rating

Humidity sensor and method of using the humidity sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Humidity sensor and method of using the humidity sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Humidity sensor and method of using the humidity sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3733139