| 主权项 |
1. A multigas sensor which comprises:
a multigas sensor element portion including:
a NOx sensor portion which detects a concentration of NOx in a gas to be measured; andtwo ammonia sensor portions which detect a concentration of ammonia in the gas to be measured, the sensor portions being first and second ammonia sensor portions having different ratios between a sensitivity of ammonia and a sensitivity of NOx, wherein the multigas sensor element portion has a plate shape which extends in an axial direction, a temperature detecting portion which controls a temperature of the NOx sensor portion is disposed in the multigas sensor element portion, and the first and second ammonia sensor portions are disposed on an outer surface of the NOx sensor portion, at least parts of the first and second ammonia sensor portions overlapping with a first region of the multigas sensor element portion, the first region being defined in a width direction by ends in the axial direction of the temperature detecting portion. |
