| 摘要 |
A gas sensor ( 1 ) with a detector element ( 2 ), which is specific of the gas to be measured and sends a measured signal that depends on the measured gas concentration, has increased measuring sensitivity for measurements in the concentration range from less than 1 ppb to a few ppb. The detector element ( 2 ) is exposed in a gas admission adapter ( 4 ) to a gas to be measured via a diaphragm ( 3 ) arranged in front of it, wherein the gas admission adapter ( 4 ) has at least a first opening ( 20 ) for the entry of the gas to be measured as well as at least a second opening ( 30 ), which is connected with a pressure modulator, which generates periodic gas pressure vibrations in the gas admission adapter ( 4 ) and is designed, for example, as a pump ( 5 ).
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