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SFM3300-AW

Proximal flow sensor for respiratory devices, reusable, 250 slm

The SFM3300 mass flow meter is a sensor for proximal flow measurement in respiratory applications such as ventilation or anesthesia. There are two versions available: the SFM3300-AW is autoclavable and washable and the SFM3300-D is single-use. The SFM3300 features outstanding measuring accuracy and robustness as well as a short signal processing time. The digital flow sensor measures bidirectional flow volumes of up to 250 slm and is fully calibrated for air, N2 and O2 gases. The special design of the flow channel results in a low dead space volume and the slightly greater pressure drop ensures more stability compared to variable inlet conditions. The sensor also features medical cones for pneumatic connection to the respiratory cycle and has a mechanical interface for a user-friendly electrical connection. Thanks to its performance characteristics, the SFM3300 mass flow meter is ideally suited for single-use proximal flow measurements in medical ventilation, hospital applications, residential care applications and emergency situations. Like all Sensirion sensors, the SFM3300 is based on the innovative CMOSens® Technology, which combines the sensor element and processing electronics on a single, tiny CMOS microchip. The CMOSens® mass flow sensor offers durably stable and interference-free measurement and enables a very fast and highly precise sensor signal.

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Specification

Gas flow
Full scale flow rate250 - 250slm250 - 250slm
Typical accuracy±3% m.v.±3% m.v.
CalibrationAIR and O₂AIR and O₂
Sensor outputFlow and TFlow and T
Maximum operating pressure1.1bar1.1bar
Fluidic connector portsMedical cone (22 mm)Medical cone (22 mm)
Generic
Supply voltage4.75 - 5.5V4.75 - 5.5V
Max. supply current10000uA10000uA
InterfacesI²CI²C
Size (LxWxH)69.3 x 25.3 x 22mm69.3 x 25.3 x 22mm

Downloads

Datasheet SFM3300
  • 07/2022•
  • PDF•
  • 373.1 KB
DatasheetDownload Datasheet SFM330007/2022Download Datasheet SFM3300PDFDownload Datasheet SFM3300373.1 KBDownload Datasheet SFM3300
Selection guide gas flow sensors
  • 12/2025•
  • PDF•
  • 563.3 KB
Application noteDownload Selection guide gas flow sensors12/2025Download Selection guide gas flow sensorsPDFDownload Selection guide gas flow sensors563.3 KBDownload Selection guide gas flow sensors
SFM3x00 I²C Functional Description
  • 05/2022•
  • PDF•
  • 306.1 KB
Application noteDownload SFM3x00 I²C Functional Description05/2022Download SFM3x00 I²C Functional DescriptionPDFDownload SFM3x00 I²C Functional Description306.1 KBDownload SFM3x00 I²C Functional Description
Sample code SFM3000
  • ZIP•
  • 261.6 KB
SoftwareDownload Sample code SFM3000Download Sample code SFM3000ZIPDownload Sample code SFM3000261.6 KBDownload Sample code SFM3000
STEP file SFM3300-AW
  • STEP•
  • 4.6 MB
Drawings/CADDownload STEP file SFM3300-AWDownload STEP file SFM3300-AWSTEPDownload STEP file SFM3300-AW4.6 MBDownload STEP file SFM3300-AW
Product flyer SFM3300-AW / SFM3200-AW
  • 09/2015•
  • PDF•
  • 260.7 KB
FlyerDownload Product flyer SFM3300-AW / SFM3200-AW09/2015Download Product flyer SFM3300-AW / SFM3200-AWPDFDownload Product flyer SFM3300-AW / SFM3200-AW260.7 KBDownload Product flyer SFM3300-AW / SFM3200-AW
Product flyer SFM proximal flow sensors
  • 04/2017•
  • PDF•
  • 667.7 KB
FlyerDownload Product flyer SFM proximal flow sensors04/2017Download Product flyer SFM proximal flow sensorsPDFDownload Product flyer SFM proximal flow sensors667.7 KBDownload Product flyer SFM proximal flow sensors
Clip-on cap/cable evaluation kit
  • 08/2026•
  • PDF•
  • 523.4 KB
Application noteDownload Clip-on cap/cable evaluation kit08/2026Download Clip-on cap/cable evaluation kitPDFDownload Clip-on cap/cable evaluation kit523.4 KBDownload Clip-on cap/cable evaluation kit
High humidity applications
  • 01/2021•
  • PDF•
  • 342.0 KB
Application noteDownload High humidity applications01/2021Download High humidity applicationsPDFDownload High humidity applications342.0 KBDownload High humidity applications
Reference and flow conversions
  • 09/2021•
  • PDF•
  • 293.7 KB
Application noteDownload Reference and flow conversions09/2021Download Reference and flow conversionsPDFDownload Reference and flow conversions293.7 KBDownload Reference and flow conversions
SEK-ControlCenter (all devices)
  • Link•
SoftwareDownload SEK-ControlCenter (all devices)Download SEK-ControlCenter (all devices)LinkDownload SEK-ControlCenter (all devices)Download SEK-ControlCenter (all devices)
STEP file SFM cap for AW/D type sensors
  • STEP•
  • 4.6 MB
Drawings/CADDownload STEP file SFM cap for AW/D type sensorsDownload STEP file SFM cap for AW/D type sensorsSTEPDownload STEP file SFM cap for AW/D type sensors4.6 MBDownload STEP file SFM cap for AW/D type sensors
REACH and RoHS declaration SFM/SGM
  • 04/2026•
  • PDF•
  • 104.6 KB
CertificateDownload REACH and RoHS declaration SFM/SGM04/2026Download REACH and RoHS declaration SFM/SGMPDFDownload REACH and RoHS declaration SFM/SGM104.6 KBDownload REACH and RoHS declaration SFM/SGM
Gas flow sensors brochure
  • 10/2025•
  • PDF•
  • 497.6 KB
FlyerDownload Gas flow sensors brochure10/2025Download Gas flow sensors brochurePDFDownload Gas flow sensors brochure497.6 KBDownload Gas flow sensors brochure
  • All products
  • •Gas flow sensors
  • •SFM3xxx-AW/D

Sensor evaluation

Buy the following products to evaluate this sensor

NameDescriptionSeriesCategory
SEK-SFM3xxx-AW/D EvaluationskitGas flow sensors evaluation kit SFM3xxx-AW/DSEK-SFMxxxxGas flow sensors

SEK-SFM3xxx-AW/D Evaluationskit

Gas flow sensors evaluation kit SFM3xxx-AW/D

SEK-SFMxxxx

Gas flow sensors

Download the respective viewer software to start measuring

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Applications for this product

Mechanical ventilators

Precise and safe patient ventilation using ventilator flow sensors

Learn more

Anesthesia flow sensor

Unlock precise gas mixing at minimal flows with ultra-accurate anesthesia low flow sensors

Learn more
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