Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1997-06-19
2000-03-21
Larkin, Daniel S.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
G01N 2564
Patent
active
060389222
ABSTRACT:
A sensor for sensing the concentration of a vapor of a volatile liquid in a gas is disclosed. The sensor has a dry-transducer temperature sensor and a wet-transducer temperature sensor. The wet transducer-temperature sensor is covered by a non-woven, non-flaking, liquid-permeable material to allow the liquid to pass from a source to about the wet-transducer temperature sensor and vaporize when the gas is not saturated with the vapor. The vaporization of the volatile liquid causes the temperature at the wet-transducer temperature sensor to have a steady-state temperature lower than the reference temperature measured by the dry-transducer temperature sensor. The difference in the temperature measured by the two temperature sensors being determinable to determine the concentration of the vapor in the gas. In an embodiment, the non-woven, non-flaking, liquid-permeable material is a porous membrane. In another embodiment, it is a gel.
REFERENCES:
patent: 1484129 (1924-02-01), Hermann et al.
patent: 1586351 (1926-05-01), Bristol et al.
patent: 2494769 (1950-01-01), Mabey
patent: 3603135 (1971-09-01), Kawaguchi
patent: 5048336 (1991-09-01), Sugihara et al.
patent: 5460041 (1995-10-01), Andes et al.
patent: 5608374 (1997-03-01), Ikejiri
"Humidity Sensor Theory and Behaivor", (1996), HyCal Tech Info, pp. 1-2.
Grate et al., "Surface Acoustic Wave Vapor Sensors Based on Resonator Devices", (1991), vol. 63(17), pp. 1719-1727, Anal. Chem.
Eisner et al., "Design and Development of a Micro-Thermocouple Sensor for Determining Temperature and Relative Humidity Patterns Within an Airstream", (1989), vol. 111, pp. 283-287, Journal of Biomechanical Engineering.
Tsuchitani et al., "A Humidity Sensor Using Ionic Copolymer and its Application to a Humidity-Temperature Sensor Module", (1988), pp. 375-385, vol. 15, Sensors and Actuators.
"IC Humidity/Temperature Sensor", (1993), (3 pgs.), HY-CAL Engineering (A Unit of General Signal).
MiniCap 2, "Relative Humidity Sensor", (3 pgs.)
W.L. McCabe et al., "Huidification operations", Unit Operations of Chemical Engineeringf, 2nd ed., Chap. 22, pp. 678-706, McGraw Hill, Inc.
R.H. Perry & Chilton (ed.), "Psychrometry", pp. 12-2 to 12-5, Chemical Engineers' Handbook, 5th ed., Section on Psychrometry by F. H. Fuller (Section 12) in portion.
Mauze Ganapati R.
Serikov Vladimir
Agilent Technologie,s Inc.
Larkin Daniel S.
LandOfFree
Thermometric apparatus and method for determining the concentrat does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thermometric apparatus and method for determining the concentrat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermometric apparatus and method for determining the concentrat will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-721529