Patent ID: 9201032
Filing Date: 2015-12-01
Classification: G01N

Abstract:
1. A gas sensor for detecting combustible gases, the gas sensor comprising: a catalytic sensor element, which is heated during operation; a housing defining a flow channel, the housing enclosing the catalytic sensor element on all sides, the housing having a gas-permeable inlet opening and a gas-permeable outlet opening, the flow channel connecting the gas-permeable inlet opening and the gas-permeable outlet opening; and electric lines connected with the sensor element, the electric lines having terminals located outside of the housing, the flow channel having a first cylindrical section with a first greatest cross sectional dimension, a second cylindrical section located vertically above the first cylindrical section with a second greatest cross sectional dimension and a conical section, said catalytic sensor being arranged in said first cylindrical section, said first cylindrical section being connected to said second cylindrical section via said conical section, wherein the first dimension is greater than the second dimension, in order to enhance a convective flow from the bottom through the inlet opening upwardly and through the outlet opening.