Exhaust gas sensor module

A fluid treatment system, comprising:

• a housing defining a fluid flow channel through which fluid is flowable in a fluid flow direction from an inlet of the housing to an outlet of the housing;
• a first fluid treatment device positioned within the fluid flow channel between the inlet and outlet of the housing;
• a second fluid treatment device positioned within the fluid flow channel between the first fluid treatment device and the outlet of the housing;
• and
• at least one sensor module comprising:
• a sensor probe positioned within the fluid flow channel between the first and second fluid treatment devices, the sensor probe comprising a plurality of hollow arms extending radially outward from a radially inward portion of the fluid flow channel to a radially outward portion of the fluid flow channel, each of the plurality of arms comprising a plurality of apertures facing a direction substantially opposite the fluid flow direction, the apertures being communicable in fluid receiving communication with a sample portion of fluid flowing through the fluid flow channel,
• at least one sensor communicable in sensing communication with fluid received through the apertures, and
• an extractor portion coupled to the sensor probe, the extractor portion comprising the sensor and the extractor portion being communicable in fluid receiving communication with the plurality of hollow arms of the sensor probe, and wherein the extractor portion comprises an outlet positioned between the second fluid treatment device and the outlet of the housing, the outlet of the extractor portion being communicable in fluid supplying communication with fluid flowing through the fluid flow channel of the housing, wherein the extractor portion comprises a bypass line extending through the second fluid treatment device, the bypass line fluidly coupling the sensor probe and the outlet of the extractor portion.

A method for sensing characteristics of a fluid flowing through a fluid conduit, comprising:

• positioning a sensor module at least partially within the fluid conduit, the sensor module comprising a plurality of hollow arms each having a plurality of racially-aligned apertures collectively defining an inlet of the sensor module and at least one fluid extractor coupled to the plurality of arms, the at least one fluid extractor comprising an outlet of the sensor module, the inlet positioned between a first fluid treatment device and a second fluid treatment device, the outlet of the at least one fluid extractor positioned between the second fluid treatment device and an outlet of the fluid conduit, the outlet of the at least one fluid extractor being communicable in fluid supplying communication with fluid flowing through the plurality of hollow arms, the at least one fluid extractor further comprising a bypass line extending about the second fluid treatment device, the bypass line fluidly coupling a sensor probe and the outlet of the sensor module;
• creating a pressure differential between the inlet and outlet of the sensor module;
• entraining a portion of the fluid flowing through the fluid conduit into the plurality of apertures, through the plurality of hollow arms, and through the at least one fluid extractor via the created pressure differential;
• and
• sensing at least one characteristic of the portion of fluid flowing through the at least one fluid extractor using the sensor probe.