Posted in | Air Flow Meters

Low-Pressure-Drop Flow Meter from Sensirion

The SFM3000 digital flow meter available from Sensirion is ideal for high-volume applications. The sensor bi-directionally measures air flow and other gases with excellent speed and precision. It outputs a 14-bit digital signal, which is internally linearized and temperature compensated. The design of the flow channel promotes a low pressure drop via the sensor element, making it perfect for respiration and ventilation applications.

The SFM3000 is based on CMOSens Technology, which integrates signal processing, sensor element, and digital calibration on a small microchip. In addition, the flow meter includes a digital 2- wire interface and operates from a 5Vdc supply voltage, making it easy to connect directly to a microcontroller. The SFM3000 is suitable or high-quality mass production and OEM applications.

Key Features

The main features of the SFM3000 digital flow meter are:

  • Very low pressure drop < 1.5mbar @ 200sml
  • Flow range: +/-200slm (bidirectional)
  • Ultra fast response time
  • Accuracy 2% m.v.
  • Digital output (I²C)
  • Digitally calibrated and temperature compensated
  • Extended dynamic range
  • Long-term stability


The applications of the SFM3000 digital flow meter are:

  • Process automation
  • Fuel cell control
  • Burner control
  • Spectroscopy
  • Environment monitoring
  • Ventilation, anaesthesia and other medical instruments

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