Patent ID: 6945123

Claim:
A sensor for redundantly measuring the amount of gas flow in a conduit having a gas flow path and for providing a pair of output signals from the sensor, each of which comprises an indication of the amount of gas flow occurring in the conduit, said sensor comprising: a housing suitable for being interposed in the conduit said housing having an orifice through which the gas, the flow of which is to be measured, flows; an anemometer positioned proximate to said orifice for providing a first output signal indicative of a first measurement of the amount of gas flow in the conduit; a first pressure sensor positioned along said gas flow path for measuring gas pressure downstream of said anemometer; a second pressure sensor positioned along said gas flow path for measuring gas pressure upstream of said anemometer; and a differential pressure measurement means coupled to said first and second pressure sensors for providing a second output signal indicative of a second measurement of the amount of gas flow in the conduit that is redundant to that of said first output signal.