Patent ID: 9207109
Filing Date: 2015-12-08
Classification: G01F

Abstract:
1. A flow sensor assembly for measuring a flow rate of a fluid stream across an operating range of flow rates, comprising: a sensor module comprising: a first flow sensor including a heater and two or more sense elements connected in a bridge configuration for sensing the flow rate of the fluid stream; a second flow sensor for sensing a measure indicative of the flow rate of the fluid stream; a control block operatively coupled to the second flow sensor, and the heater of the first flow sensor, the control block is configured to receive the measure indicative of the flow rate of the fluid stream from the second flow sensor, and based on the measure indicative of the flow rate of the fluid stream from the second flow sensor, drive the heater of the first flow sensor to a heater temperature that causes the bridge of the first flow sensor to provide an analog output signal that: 1) is indicative of the flow rate of the fluid stream; and 2) does not deviate from a perfect linear output by more than 10% over the operating range of flow rates of the flow sensor assembly.