An approach to the design and fabrication of a microprocessor based flow meter using resistance and semiconductor probe

摘要

An approach to the design and fabrication of a mass flow meter of a fluid using heat transfer technology is presented. The method uses the application of a simple matched pair of transistors as the flow transducer and compares the results with another flow transducer using a platinum resistance temperature detector. The effect of the temperature of the fluid is eliminated using the bridge circuit with the reference temperature probe placed in the static reference bath within the flow meter.