Patent ID: 8024146

Claim:
A mass flow sensor apparatus for sensing a mass flow rate of a fluid traveling down a flow channel, wherein the fluid is a known fluid type of two or more fluid types each having different fluid characteristics, comprising: a mass flow sensor for sensing the mass flow rate of the fluid traveling down the flow channel, the mass flow sensor providing a mass flow rate signal; a non-volatile memory storing: a first set of coefficients that correspond to a first fluid type of the two or more fluid types; a second set of coefficients that correspond to a second fluid type of the two or more fluid types, wherein the first set of coefficients are different from the second set of coefficients; and a controller that: reads the first set of coefficients from the non-volatile memory and compensates the mass flow rate signal using the first set of coefficients when the first fluid type is traveling down the flow channel; and reads the second set of coefficients from the non-volatile memory and compensates the mass flow rate signal using the second set of coefficients when the second fluid type is traveling down the flow channel.