All based on its SFM3xxx platform, they are intended for inspiratory applications at ambient pressure.
SFM3003 has an extended flow range between -150 and 300 slm. It is based on the technology used in the SFM3019 sensor, which was introduced during the COVID-19 pandemic to provide a high volume flow sensors for inspiratory flow measurements in medical ventilators.
Compared to SFM3019, SFM3003 comes with a wider flow range and improved specifications. The flow of air, oxygen and mixtures of them at rates between -30 and 300 slm can be measured, and accuracy maintained without recalibration. It is designed for low pressure drop and fast response.
SFM3013 is a variant of SFM3003, offering additional resistance against over-pressure (up to 1 bar gauge pressure), and is also calibrated for heliox gas. “Both sensors are the ideal solution for high-volume applications that prioritise cost efficiency,” according to the company.
SFM3119 (pictured) is a compact digital flow meter. It is the successor to the SFM3100, and compared to its predecessor SFM3119 comes with a digital I2C output and improved specifications.
It measures flows of air, oxygen and mixtures of them between -10 and 240 slm.
Pressure drop is designed to be low and inspiratory flow sensing applications are foreseen ventilation and anesthesia, and for precise mixing of oxygen and air.
Switzerland-based Sensirion will be showing these sensors at MD&M West in Anaheim California (10 – 12 August, booth 2362).
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August 10, 2021 at 02:28PM
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Improved flow sensors for ventilators - Electronics Weekly
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