Sensor element for determination of concentration of substances

Details Sensor element for determination of concentration of substances Sensor element for determination of concentration of substances

1987-04-17

1988-07-05

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2504611, 356417, G01N 2100, G01N 2164

Patent

active

047556676

ABSTRACT:
A sensor element for use in determining the concentrations of substances contained in gaseous and liquid samples includes a carrier layer and an indicator layer containing one or more indicator substances whose optical properties change depending on the concentration of the substances to be measured, the carrier layer being provided with at least one photosensitive element with electrical contacts in planar arrangement, the indicator layer acting as a waveguide for excitation radiation coupled therein by an optical element.

REFERENCES:
patent: 3604927 (1971-09-01), Hirschfeld
patent: 3962581 (1976-06-01), Zimmerman
patent: 4269516 (1981-05-01), Libbers et al.

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