Sensor for monitoring concentration of gaseous substances

Details Sensor for monitoring concentration of gaseous substances Sensor for monitoring concentration of gaseous substances

1997-03-17

1999-10-19

Brock, Michael

Measuring and testing

Gas analysis

Detector detail

73 3106, 338 34, G01N 2712

Patent

active

059692316

ABSTRACT:
The invention provides a sensor arrangement for monitoring the concentrat of moisture and gaseous substances in ambient air. A gas sensitive intermediate layer is sandwiched between top and bottom electrodes, each of which comprises first and second interdigitated conductive elements, which are coupled to an opposite polarity voltage. The top and bottom electrodes are super-imposed on opposite sides of the gas-sensitive intermediate layer, with fingers of the top electrode having a voltage polarity which is opposite that of adjacent super-imposed fingers of the bottom electrode.

REFERENCES:
patent: 3255324 (1966-06-01), Ovshinsky
patent: 3705375 (1972-12-01), Hershler
patent: 4328478 (1982-05-01), Murata et al.
patent: 4377944 (1983-03-01), Hishii et al.
patent: 4422129 (1983-12-01), Briant et al.
patent: 4447352 (1984-05-01), Inoue et al.
patent: 4464647 (1984-08-01), Yokomizo et al.
patent: 5618496 (1997-04-01), Hasumi et al.

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