Measuring apparatus for detecting gases

Details Measuring apparatus for detecting gases Measuring apparatus for detecting gases

1991-02-22

1992-03-03

Niebling, John

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204409, 20415317, G01N 2627

Patent

active

050929801

ABSTRACT:
The invention is directed to a measuring apparatus for detecting gases with the aid of an electrochemical sensor with a diffusion barrier being disposed ahead of the sensor. The measuring apparatus is improved in such a manner that the sensor is adaptable with respect to its sensitivity to different measuring ranges during operation without external intervention. The speed of response of the sensor is also increased. Diffusion openings in the diffusion barrier are closable with a valve arrangement associated with the valve openings. The valve arrangement is connected via a valve drive unit to a measurement value comparator for changing the operating position of the particular valve to be actuated.

REFERENCES:
patent: 3787308 (1974-01-01), Malaspina et al.
patent: 4479865 (1984-10-01), Beder et al.
patent: 4620918 (1986-11-01), Bukamier et al.
patent: 4988429 (1991-01-01), Matthiessen

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