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SFM3300-D

Proximal flow sensor for respiratory devices, single-use, 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 rate
-250 - 250
-250 - 250slm
Typical accuracy
±3% m.v.
±3% m.v.
Calibration
AIR and O₂
AIR and O₂
Sensor output
Flow and T
Flow and T
Maximum operating pressure
1.1
1.1bar
Fluidic connector ports
Medical cone (22 mm)
Medical cone (22 mm)
Generic
Supply voltage
4.75 - 5.5
4.75 - 5.5V
Max. supply current
10000
10000uA
Interfaces
I²C
I²C
Size (LxWxH)
69.3 x 25.3 x 22
69.3 x 25.3 x 22mm

Downloads

Datasheet SFM3300

07/2022

File

373.1 KB

Datasheet07/2022PDF373.1 KB
Cleaning methods SFM3x00-AW

01/2021

File

188.0 KB

Application note01/2021PDF188.0 KB
Selection guide gas flow sensors

06/2025

File

449.9 KB

Application note06/2025PDF449.9 KB
SFM3x00 I²C Functional Description

05/2022

File

306.1 KB

Application note05/2022PDF306.1 KB
Sample code SFM3000

File

261.6 KB

SoftwareZIP261.6 KB
STEP file SFM3300-D

File

2.1 MB

Drawings/CADSTEP2.1 MB
Product flyer SFM proximal flow sensors

04/2017

File

667.7 KB

Flyer04/2017PDF667.7 KB
Clip-on cap/cable evaluation kit

02/2025

File

498.6 KB

Application note02/2025PDF498.6 KB
High humidity applications

01/2021

File

342.0 KB

Application note01/2021PDF342.0 KB
Reference and flow conversions

09/2021

File

293.7 KB

Application note09/2021PDF293.7 KB
SEK-ControlCenter (all devices)

Link

SoftwareLink
STEP file SFM cap for AW/D type sensors

File

4.6 MB

Drawings/CADSTEP4.6 MB
REACH and RoHS declaration SFM/SGM

01/2025

File

122.8 KB

Certificate01/2025PDF122.8 KB
Gas flow sensors brochure

01/2024

File

497.6 KB

Flyer01/2024PDF497.6 KB

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

Go to download center

Start testing our sensors fast and easy with the evaluation kits

How to get started

Smart sensors for your application

Sensirion's sensor solutions are used in a wide range of applications and markets. Our reliable environmental and flow sensors improve energy efficiency, increase health and ensure safety and comfort.

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