Honeycomb catalyst body with sensor device

摘要

There is provided a honeycomb catalyst body 1a including a catalyst-carrying honeycomb structure 15 having partition walls 13 separating and forming cells 11 functioning as fluid passages of the exhaust gas and having catalyst loaded on at least a part of surfaces thereof. A sensor disposition region 17a of a groove, a hole, or an edging where a gas sensor is disposed is formed in the catalyst-carrying honeycomb structure 15, and part (plugged cells 23) of the cells (ordinary cells 27) communicating with the sensor disposition region 17a are plugged with plugging portions 19, and a percentage of the number of plugged cells 23 where the plugging portions are disposed in the sum of the plugged cells 23 where the plugging portions are disposed and through-cells 25 where no plugging portion 19 is disposed among the cells 27 communicating with the sensor disposition region 17a is 15 to 60%.