Swiss sensor manufacturer Sensirion has launched a new digital mass flowmeter for high-volume applications in medical devices, process automation and burner control. The flow channel is designed to achieve a very low pressure drop of less than 3 mbar through the sensor element. The SFM3000 flowmeter bi-directionally measures the flow of air and other nonaggressive gases at rates up to 200 slm with high accuracy and very high speed. It outputs a 14-bit digital signal at a 2-kHz update rate. The signal is internally linearised and temperature compensated. Furthermore, the new mass flowmeter operates from a 5-V–dc supply voltage and features a digital 2-wire interface for direct and easy connection to a microcontroller.
The performance of the SFM3000 gas flow sensor is based on Sensirion’s patented CMOSens technology, which combines the sensor element, signal processing and digital calibration on a tiny microchip. Gas flow is measured by a thermal sensor element to provide an extended dynamic range and enhanced long-term stability compared to other flow measuring technologies. The flowmeter is suited for high-quality mass production and cost-sensitive OEM applications in medical ventilation and anaesthesia.
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