Patent attributes
A Wheatstone bridge flowmeter is formed on a base substrate with a fluid passageway formed over or through a top surface of the base substrate. Resistors forming the Wheatstone bridge and a heater are arranged in a linear physical arrangement along the passageway, such that two resistors on one side of the Wheatstone bridge are sequentially upstream of the heater and two resistors on the other side of the Wheatstone bridge are sequentially downstream of the heater, establishing a sequential arrangement along the fluid passageway of two of the resistors, the heater and the other two resistors. Heating of the fluid by the heater creates a differential in the temperatures of the resistors, thereby changing the output sensing voltages across the Wheatstone bridge.
