A digital gas flowmeter (DigiFlux™) using hall effect gas sensor for medical/science use

摘要

This DigiFlux™ digital gas flow sensor (DigiFlux™) can measure the gas flow by its Hall effect gas sensor. DigiFlux™ [FIG. 1] is based on the Hall effect. In DigiFlux™, an air-float with a small magnetic-iron attached to its bottom, is upright on a Hall effect sensor made by a conductor with I/O connector. When the air-float moves up or down caused by the gas influx pressure, the magnetic-iron in the bottom of air-float will cause electromagnetic sense, and will generate Hall voltage (Vh) signal on Hall effect sensor. The Vh signal will be sent to amplifier then to the MCU/DSP for analog-to-digital conversion, then the gas influx flow will be sensed as digital signal and can be processed by MCU/DSP. Based on functional program one can set different modes to measure gas flow. DigiFlux™ can measure gas flow with high-precision even with a small influx of gas.