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NRND

SFM4100-20-Ar

  • All products
  • •Gas flow sensors
  • •SFM4xxx

Pressure-resistant flow sensor for Ar, 20slm, push-in fittings

Designed for anaesthesia equipment, the CMOSens® mass flow meter SFM4100 precisely measures air and other non-aggressive gases. It provides an impressively wide dynamic measuring range up to 20 slm. The sensor unit has a digital I²C interface, provides a fully calibrated and temperature compensated output signal, and operates reliably at pressures of up to 7 bar. Its outstanding long-term stability makes the SFM4100 first choice for products that require a high rate of deployment with long service intervals. For OEM projects, more than one gas calibration can be stored simultaneously in each sensor device. Self-test features allow testing of the entire signal chain (from capture of the analogue signal through digital signal chain) while the mass flow meter is in use. This makes the SFM4100 an optimal solution for safety-critical applications.
Successor productSee inventoryDistributor listContact sales

Successor product

NameDescriptionSeriesCategory
SFM4300-20-PPressure-resistant multi-gas flow sensor, 20slm, push-in fittingsSFM4xxxGas flow sensors

SFM4300-20-P

Pressure-resistant multi-gas flow sensor, 20slm, push-in fittings

SFM4xxx

Gas flow sensors

Specification

Gas flow
Full scale flow rate0 - 20slm0 - 20slm
Typical accuracy±3% m.v.±3% m.v.
CalibrationArAr
Sensor outputArAr
Maximum operating pressure

Downloads

Datasheet SFM4100
  • 01/2024•
  • PDF•
  • 481.6 KB
DatasheetDownload Datasheet SFM410001/2024Download Datasheet SFM4100PDFDownload Datasheet SFM4100481.6 KBDownload Datasheet SFM4100
CRC calculation SFM4100
  • 06/2009•
  • PDF•
  • 43.4 KB
Application noteDownload CRC calculation SFM410006/2009Download CRC calculation SFM4100PDFDownload CRC calculation SFM410043.4 KBDownload CRC calculation SFM4100
Sample code note SFM4100
  • 07/2009•
  • PDF•
  • 103.0 KB
Application noteDownload Sample code note SFM410007/2009Download Sample code note SFM4100PDFDownload Sample code note SFM4100103.0 KBDownload Sample code note SFM4100
Sample code SFM4100
  • 07/2009•
  • PDF•
  • 103.0 KB
SoftwareDownload Sample code SFM410007/2009Download Sample code SFM4100PDFDownload Sample code SFM4100103.0 KBDownload Sample code SFM4100
STEP file SFM4100 (Straight)
  • ZIP•
  • 2.9 MB
Drawings/CADDownload STEP file SFM4100 (Straight)Download STEP file SFM4100 (Straight)ZIPDownload STEP file SFM4100 (Straight)2.9 MBDownload STEP file SFM4100 (Straight)
Calibration certification SFM4100
  • 08/2010•
  • PDF•
  • 18.8 KB
CertificateDownload Calibration certification SFM410008/2010Download Calibration certification SFM4100PDFDownload Calibration certification SFM410018.8 KBDownload Calibration certification SFM4100
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
Reference and flow conversions calculator
  • XLSX•
  • 30.3 KB
Application noteDownload Reference and flow conversions calculatorDownload Reference and flow conversions calculatorXLSXDownload Reference and flow conversions calculator30.3 KBDownload Reference and flow conversions calculator
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
Engineering guide SFM
  • 01/2021•
  • PDF•
  • 592.1 KB
GuideDownload Engineering guide SFM01/2021Download Engineering guide SFMPDFDownload Engineering guide SFM592.1 KBDownload Engineering guide SFM
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)
Calibration certification gas flow sensors
  • 01/2023•
  • PDF•
  • 114.2 KB
CertificateDownload Calibration certification gas flow sensors01/2023Download Calibration certification gas flow sensorsPDFDownload Calibration certification gas flow sensors114.2 KBDownload Calibration certification gas flow 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
  • Home
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  • SFM4100-20-Ar
6
bar
6
bar
Fluidic connector portsLegris carstick (6 mm)Legris carstick (6 mm)
Generic
Supply voltage3.5 - 9V3.5 - 9V
Max. supply current12500uA12500uA
InterfacesI²CI²C
Size (LxWxH)93 x 31.88 x 27.2mm93 x 31.88 x 27.2mm

Sensor evaluation

Buy the following products to evaluate this sensor

NameDescriptionSeriesCategory
SEK-SensorBridgeConnecting bridge with two sensor portsSEK-SensorBridge
SEK-SFM4100Gas flow sensors evaluation kit SFM4100SEK-SFMxxxxGas flow sensors

SEK-SensorBridge

Connecting bridge with two sensor ports

SEK-SensorBridge

SEK-SFM4100

Gas flow sensors evaluation kit SFM4100

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

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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