Dual heater gas sensor module

A dual heater gas sensor module comprising:

• a housing comprising a front side in which an inflow hole, through which air is introduced, is defined and a rear side in which an outflow hole, through which air is discharged, is defined, the housing being configured to define an outer appearance of the dual heater gas sensor module;
• a controller configured to control an operation of the dual heater gas sensor module;
• a first gas sensor configured to heat the air introduced through the inflow hole of the front side of the housing, wherein the first gas sensor is not provided with a sensing material;
• and
• a second gas sensor configured to measure a specific gas contained in the air discharged through the outflow hole of the rear side of the housing,
• wherein air introduced through the inflow hole of the front side flows through a flow path within the housing to be discharged through the outflow hole of the rear side, wherein the flow path is defined by:
• a first region horizontally connected to the inflow hole and comprising a first floor,
• a second region horizontally connected to the outflow hole and comprising a second floor which is higher than the first floor, and
• a third region connecting the first region and second region and comprising an inclined third floor between the first region and the second region,
• wherein the first gas sensor is disposed at the first floor of the first region,
• wherein the second gas sensor is disposed at the second floor of the second region, and wherein the controller is further configured to:
• set a driving resistance value and a driving voltage value of each of the first gas sensor and the second gas sensor as offset values when the dual heater gas sensor module operates,
• sense change of an external temperature,
• read a resistance change value of the first gas sensor when the change of the external temperature is sensed, and
• change the driving resistance value and the driving voltage value of the second gas sensor to correspond to the resistance change value of the first gas sensor.