Patent ID: 6546812
Filing Date: 2003-04-15
Classification: G01F,G01N

Abstract:
A venturi metering device for measuring the flow of an exhaust gas in a conduit, the venturi metering device comprising:a housing having a longitudinal axis, an entrance section, a throat section, and an exit section, the throat section having a smaller diameter than the entrance and exit sections; a pressure sensing means for sensing the pressure in the throat section and the entrance section, and for producing an electrical output that characterizes the pressure that the pressure sensing means senses; a computer for computing the flow rate through the housing using the electrical output, the computer being operably connected to the pressure sensing means for receiving the electrical output; an entrance heater operably positioned adjacent the entrance section; and an exit heater operably positioned adjacent the exit section, the computer being operably connected to the entrance and exit heaters for controlling the temperature of the entrance and exit heaters to flash vaporize any condensed moisture that flows into the housing.