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End of life

SFA30

  • All products
  • •Formaldehyde sensors
  • •SFA30

Formaldehyde sensor with ultra low cross-sensitivity to ethanol

The SFA30 is a digital formaldehyde sensor designed for easy integration into air purifiers, demand-controlled ventilation systems, or indoor air quality monitors.

Based on the electrochemical measurement principle, the SFA30 offers excellent performance with a uniquely low cross-sensitivity to other VOCs. The integrated humidity and temperature sensor provides accurate readings and enables a fully temperature/humidity compensated and factory calibrated formaldehyde concentration output in ppb. Selectable digital UART and I²C interface options, a standard electrical connector, and versatile mounting options make the integration easy. Relying on our experience in environmental sensing and a patented electrochemical cell with anti-dry technology, the SFA30 offers excellent long-term stability and 6 years service lifetime. On top of that, the SFA30 is compliant with the relevant healthy building standards RESET® and WELL Building Standard™.

 

Download our free article on formaldehyde here.

Successor productSee inventoryDistributor listContact sales

Successor product

NameDescriptionSeriesCategory
SFA40Miniature, low power consumption formaldehyde sensor for indoor air quality...SFA40Formaldehyde sensors

SFA40

Miniature, low power consumption formaldehyde sensor for indoor air quality applications

SFA40

Formaldehyde sensors

Specification

Formaldehyde
Measurement range0 - 1000ppb0 - 1000ppb
Accuracy
±20 ppb or ±20% m.v.
±20 ppb or ±20% m.v.
Sensor outputFormaldehyde concentration in ppb, RH, TFormaldehyde concentration in ppb, RH, T
Cross sensitivity to ethanol< 0.5%< 0.5%

Downloads

Datasheet SFA30
  • 01/2025•
  • PDF•
  • 511.2 KB
DatasheetDownload Datasheet SFA3001/2025Download Datasheet SFA30PDFDownload Datasheet SFA30511.2 KBDownload Datasheet SFA30
Laboratory testing guide SFA30
  • 03/2024•
  • PDF•
  • 327.0 KB
Application noteDownload Laboratory testing guide SFA3003/2024Download Laboratory testing guide SFA30PDFDownload Laboratory testing guide SFA30327.0 KBDownload Laboratory testing guide SFA30
Arduino snippets SFA30
  • Link•
SoftwareDownload Arduino snippets SFA30Download Arduino snippets SFA30LinkDownload Arduino snippets SFA30Download Arduino snippets SFA30
Makecode SFA30
  • Link•
SoftwareDownload Makecode SFA30Download Makecode SFA30LinkDownload Makecode SFA30Download Makecode SFA30
REACH and RoHS declaration SFA3x
  • 04/2026•
  • PDF•
  • 114.6 KB
CertificateDownload REACH and RoHS declaration SFA3x04/2026Download REACH and RoHS declaration SFA3xPDFDownload REACH and RoHS declaration SFA3x114.6 KBDownload REACH and RoHS declaration SFA3x
Description I²C SFA30
  • 01/2021•
  • PDF•
  • 269.0 KB
Application noteDownload Description I²C SFA3001/2021Download Description I²C SFA30PDFDownload Description I²C SFA30269.0 KBDownload Description I²C SFA30
Handling and assembly instructions SFA30
  • 04/2021•
  • PDF•
  • 384.4 KB
Application noteDownload Handling and assembly instructions SFA3004/2021Download Handling and assembly instructions SFA30PDFDownload Handling and assembly instructions SFA30384.4 KBDownload Handling and assembly instructions SFA30
Design-in guide SFA30
  • 11/2020•
  • PDF•
  • 807.4 KB
GuideDownload Design-in guide SFA3011/2020Download Design-in guide SFA30PDFDownload Design-in guide SFA30807.4 KBDownload Design-in guide SFA30
Arduino driver I2C SFA3x
  • Link•
SoftwareDownload Arduino driver I2C SFA3xDownload Arduino driver I2C SFA3xLinkDownload Arduino driver I2C SFA3xDownload Arduino driver I2C SFA3x
Arduino driver UART SFA3x
  • Link•
SoftwareDownload Arduino driver UART SFA3xDownload Arduino driver UART SFA3xLinkDownload Arduino driver UART SFA3xDownload Arduino driver UART SFA3x
BLE gadget SFA30
  • Link•
SoftwareDownload BLE gadget SFA30Download BLE gadget SFA30LinkDownload BLE gadget SFA30Download BLE gadget SFA30
Embedded drivers SFA3x
  • Link•
SoftwareDownload Embedded drivers SFA3xDownload Embedded drivers SFA3xLinkDownload Embedded drivers SFA3xDownload Embedded drivers SFA3x
Raspberry Pi drivers I2C SFA3x
  • Link•
SoftwareDownload Raspberry Pi drivers I2C SFA3xDownload Raspberry Pi drivers I2C SFA3xLinkDownload Raspberry Pi drivers I2C SFA3xDownload Raspberry Pi drivers I2C SFA3x
Raspberry Pi drivers UART SFA3x
  • Link•
SoftwareDownload Raspberry Pi drivers UART SFA3xDownload Raspberry Pi drivers UART SFA3xLinkDownload Raspberry Pi drivers UART SFA3xDownload Raspberry Pi drivers UART SFA3x
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 SFA30
  • STEP•
  • 5.9 MB
Drawings/CADDownload STEP file SFA30Download STEP file SFA30STEPDownload STEP file SFA305.9 MBDownload STEP file SFA30
Formaldehyde product flyer
  • 02/2026•
  • PDF•
  • 561.1 KB
FlyerDownload Formaldehyde product flyer02/2026Download Formaldehyde product flyerPDFDownload Formaldehyde product flyer561.1 KBDownload Formaldehyde product flyer
Indoor air quality brochure
  • 11/2025•
  • PDF•
  • 7.0 MB
FlyerDownload Indoor air quality brochure11/2025Download Indoor air quality brochurePDFDownload Indoor air quality brochure7.0 MBDownload Indoor air quality brochure
  • Home
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  • SFA30
Limit of detection< 20ppb< 20ppb
Lifetime> 6years> 6years
Humidity
Typ. relative humidity accuracy2.5%RH2.5%RH
Operating relative humidity range10 - 90%RH10 - 90%RH
Generic
Supply voltage3.15 - 5.5V3.15 - 5.5V
Average supply current1000uA1000uA
Max. supply current5000uA5000uA
Operating temperature range [°C]0 - 40°C0 - 40°C
InterfacesI²C, UARTI²C, UART
Size (LxWxH)46 x 24 x 5.5mm46 x 24 x 5.5mm
Temperature
Typ. temperature accuracy0.2°C0.2°C

Sensor evaluation

Buy the following products to evaluate this sensor

NameDescriptionSeriesCategory
SEK-SFA30Formaldehyde evaluation kit SFA30SEK-SFAxxFormaldehyde sensors

SEK-SFA30

Formaldehyde evaluation kit SFA30

SEK-SFAxx

Formaldehyde 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

Air conditioners

Highest comfort and maximum energy efficiency enabled by advanced sensors for air conditioner

Learn more

Air purifiers

Air quality monitoring with our air purifier sensor

Learn more

Demand-controlled ventilators

Maximized well-being and optimum energy efficiency with our DCV sensor

Learn more

Room sensors

Precise visualization and characterization of indoor air

Learn more

Smart speakers

Air quality sensors turn smart speakers into intelligent indoor air monitors

Learn more

Thermostats

Why thermostats depend on accurate sensors

Learn more

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