Patent ID: 7174782

Claim:
Apparatus for measuring properties of a fluid flowing therepast, comprising: a. a housing having an opening to receive the flowing fluid, and an exit; b. a duct through the housing permitting at least a portion of the fluid to flow from the leading end opening to the exit; c. a primary chamber in fluid communication with the duct to receive a portion of the fluid flowing through the duct; d. a temperature sensor in the primary chamber; e. a secondary chamber with at least one secondary sensor therein; f. at least one side exit port in the housing; g. a channel fluidly connecting the secondary chamber to at least one side exit port; h. an additional secondary chamber in fluid communication with the primary chamber and containing a third sensor; and i. an aspirator tube in the additional secondary chamber, the aspirator tube comprising a combined sensor chamber and aspirator tube, the aspirator tube being separated from the sensor chamber, and rearwardly facing ports for discharging fluid from the aspirator tube.