Modulated oxygen-flux method and apparatus to improve the perfor

Details Modulated oxygen-flux method and apparatus to improve the perfor Modulated oxygen-flux method and apparatus to improve the perfor

1998-02-10

2000-10-17

Soderquist, Arlen

Chemistry: analytical and immunological testing

Measurement includes temperature change of the material...

436133, 436134, 436137, 436139, 436143, 436151, 436152, 436159, 436160, 422 94, 422 98, G01N 2522, G01N 2530, G01N 3300

Patent

active

061330426

ABSTRACT:
A method and apparatus is provided for modulating the flux of oxygen impinging on a calorimetric gas sensor. The method and apparatus are based on modulating the oxygen concentration of a gas mixture presented to the microcalorimeter between a predetermined high level and at a substantially zero value to create a modulated output to reduce the noise of the sensor and to eliminate its zero-offset.

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Logothetis et al. Sens. Actuators, B 1992, B9, 183-189.
J. H. Visser et al. Sens. Actuators, B 1992, B9, 233-239.

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