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SGP40

VOC sensor for indoor air quality applications

SGP40 is a digital VOC (volatile organic compounds) sensor designed for easy integration into air treatment devices and air quality monitors. 

 

Based on our patented CMOSens® Technology, the SGP40 offers a complete sensor system on a single chip and features a digital I²C interface, a temperature-controlled micro-hotplate and a humidity-compensated indoor air quality signal. In combination with our powerful VOC Algorithm (part of the gas index algorithm software), the sensor signal can be directly used to evaluate indoor air quality, e.g., for triggering the gradual fan control of an air treatment device. Both the SGP40 chip and VOC algorithm feature unrivaled robustness in the final application over their lifetimes. Pushing the multipixel and multi-hotplate approach to the next level of individual control of each sensing element, the SGP40 enables a drastic reduction in power consumption, making it suitable for battery-driven applications as well. On top of that, the SGP40 is compliant with the relevant healthy building standards RESET® and WELL Building Standard™ – for more information please refer to the application note "Compliance of Sensirion’s VOC Sensors with RESET and WELL" below. 

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Specification

VOC
Sensor outputTwo digital 16-bit raw signalsTwo digital 16-bit raw signals
Processed output0-500 VOC Index0-500 VOC Index
Measurement range
0 - 1000ppm
0 - 1000ppm
Response time (τ63%)< 10s< 10s
Device-to-device var.15 - 15% m.v.15 - 15% m.v.
Limit of detection< 0.05 ppm of ethanol equivalents or < 10 % of concentration setpoint, whichever is larger< 0.05 ppm of ethanol equivalents or < 10 % of concentration setpoint, whichever is larger
Switch-on time
1.0h
1.0h
On-chip humidity compensationYesYes
Generic
Supply voltage1.7 - 3.6V1.7 - 3.6V
Average supply current2600uA2600uA
Max. supply current3000uA3000uA
InterfacesI²CI²C
Size (LxWxH)2.44 x 2.44 x 0.85mm

Downloads

Datasheet SGP40
  • 09/2021•
  • PDF•
  • 935.9 KB
DatasheetDownload Datasheet SGP4009/2021Download Datasheet SGP40PDFDownload Datasheet SGP40935.9 KBDownload Datasheet SGP40
Compliance of Sensirion’s VOC Sensors with RESET and WELL
  • 04/2023•
  • PDF•
  • 748.3 KB
Application noteDownload Compliance of Sensirion’s VOC Sensors with RESET and WELL04/2023Download Compliance of Sensirion’s VOC Sensors with RESET and WELLPDFDownload Compliance of Sensirion’s VOC Sensors with RESET and WELL748.3 KBDownload Compliance of Sensirion’s VOC Sensors with RESET and WELL
Handling and Assembly Instructions
  • 04/2023•
  • PDF•
  • 365.1 KB
GuideDownload Handling and Assembly Instructions04/2023Download Handling and Assembly InstructionsPDFDownload Handling and Assembly Instructions365.1 KBDownload Handling and Assembly Instructions
Quick testing guide SGP40
  • 08/2020•
  • PDF•
  • 459.9 KB
GuideDownload Quick testing guide SGP4008/2020Download Quick testing guide SGP40PDFDownload Quick testing guide SGP40459.9 KBDownload Quick testing guide SGP40
Arduino driver SGP40
  • 04/2022•
  • Link•
SoftwareDownload Arduino driver SGP4004/2022Download Arduino driver SGP40LinkDownload Arduino driver SGP40Download Arduino driver SGP40
Embedded drivers SGP40
  • Link•
SoftwareDownload Embedded drivers SGP40Download Embedded drivers SGP40LinkDownload Embedded drivers SGP40Download Embedded drivers SGP40
Gas index algorithm
  • Link•
SoftwareDownload Gas index algorithmDownload Gas index algorithmLinkDownload Gas index algorithmDownload Gas index algorithm
Raspberry Pi drivers SGP40
  • Link•
SoftwareDownload Raspberry Pi drivers SGP40Download Raspberry Pi drivers SGP40LinkDownload Raspberry Pi drivers SGP40Download Raspberry Pi drivers SGP40
How can air quality at home be improved?
  • 04/2022•
  • PDF•
  • 260.1 KB
Application noteDownload How can air quality at home be improved?04/2022Download How can air quality at home be improved?PDFDownload How can air quality at home be improved?260.1 KBDownload How can air quality at home be improved?
How can I integrate Sensirion’s VOC and NOx sensors into my air purifier?
  • 04/2022•
  • PDF•
  • 249.8 KB
Application noteDownload How can I integrate Sensirion’s VOC and NOx sensors into my air purifier?04/2022Download How can I integrate Sensirion’s VOC and NOx sensors into my air purifier?PDFDownload How can I integrate Sensirion’s VOC and NOx sensors into my air purifier?249.8 KBDownload How can I integrate Sensirion’s VOC and NOx sensors into my air purifier?
How can I make my air purifier smart/efficient?
  • 04/2022•
  • PDF•
  • 215.4 KB
Application noteDownload How can I make my air purifier smart/efficient?04/2022Download How can I make my air purifier smart/efficient?PDFDownload How can I make my air purifier smart/efficient?215.4 KBDownload How can I make my air purifier smart/efficient?
Is it possible to map the output of a MOX sensor to a norm?
  • 04/2022•
  • PDF•
  • 258.0 KB
Application noteDownload Is it possible to map the output of a MOX sensor to a norm?04/2022Download Is it possible to map the output of a MOX sensor to a norm?PDFDownload Is it possible to map the output of a MOX sensor to a norm?258.0 KBDownload Is it possible to map the output of a MOX sensor to a norm?
What are oxidizing gases?
  • 04/2022•
  • PDF•
  • 214.8 KB
Application noteDownload What are oxidizing gases?04/2022Download What are oxidizing gases?PDFDownload What are oxidizing gases?214.8 KBDownload What are oxidizing gases?
What are reducing gases?
  • 04/2022•
  • PDF•
  • 332.0 KB
Application noteDownload What are reducing gases?04/2022Download What are reducing gases?PDFDownload What are reducing gases?332.0 KBDownload What are reducing gases?
What is a metal oxide (MOX) sensor?
  • 04/2022•
  • PDF•
  • 288.2 KB
Application noteDownload What is a metal oxide (MOX) sensor?04/2022Download What is a metal oxide (MOX) sensor?PDFDownload What is a metal oxide (MOX) sensor?288.2 KBDownload What is a metal oxide (MOX) sensor?
What is Sensirion’s NOx Index?
  • 04/2022•
  • PDF•
  • 341.2 KB
Application noteDownload What is Sensirion’s NOx Index?04/2022Download What is Sensirion’s NOx Index?PDFDownload What is Sensirion’s NOx Index?341.2 KBDownload What is Sensirion’s NOx Index?
What is Sensirion’s VOC Index?
  • 04/2022•
  • PDF•
  • 300.4 KB
Application noteDownload What is Sensirion’s VOC Index?04/2022Download What is Sensirion’s VOC Index?PDFDownload What is Sensirion’s VOC Index?300.4 KBDownload What is Sensirion’s VOC Index?
Design-in guide SGP4x
  • 08/2020•
  • PDF•
  • 304.4 KB
GuideDownload Design-in guide SGP4x08/2020Download Design-in guide SGP4xPDFDownload Design-in guide SGP4x304.4 KBDownload Design-in guide SGP4x
Testing guide SGP4x
  • 03/2021•
  • PDF•
  • 507.9 KB
GuideDownload Testing guide SGP4x03/2021Download Testing guide SGP4xPDFDownload Testing guide SGP4x507.9 KBDownload Testing guide SGP4x
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 SGP40
  • STEP•
  • 1.3 MB
Drawings/CADDownload STEP file SGP40Download STEP file SGP40STEPDownload STEP file SGP401.3 MBDownload STEP file SGP40
REACH and RoHS declaration SGP
  • 04/2026•
  • PDF•
  • 101.0 KB
CertificateDownload REACH and RoHS declaration SGP04/2026Download REACH and RoHS declaration SGPPDFDownload REACH and RoHS declaration SGP101.0 KBDownload REACH and RoHS declaration SGP
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
SGP4x evaluation kit
  • 10/2020•
  • PDF•
  • 1.7 MB
FlyerDownload SGP4x evaluation kit10/2020Download SGP4x evaluation kitPDFDownload SGP4x evaluation kit1.7 MBDownload SGP4x evaluation kit
VOC and NOx product flyer
  • 10/2024•
  • PDF•
  • 341.9 KB
FlyerDownload VOC and NOx product flyer10/2024Download VOC and NOx product flyerPDFDownload VOC and NOx product flyer341.9 KBDownload VOC and NOx product flyer
VOC and NOx product flyer Chinese
  • 03/2025•
  • PDF•
  • 677.9 KB
FlyerDownload VOC and NOx product flyer Chinese03/2025Download VOC and NOx product flyer ChinesePDFDownload VOC and NOx product flyer Chinese677.9 KBDownload VOC and NOx product flyer Chinese
VOC and NOx product flyer Japanese
  • 08/2025•
  • PDF•
  • 3.0 MB
FlyerDownload VOC and NOx product flyer Japanese08/2025Download VOC and NOx product flyer JapanesePDFDownload VOC and NOx product flyer Japanese3.0 MBDownload VOC and NOx product flyer Japanese
  • All products
  • •NOx & VOC sensors
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Sensor evaluation

Buy the following products to evaluate this sensor

NameDescriptionSeriesCategory
SEK-SVM4xEvaluation kit SEK-SVM4x for SGP40/SGP41SEK-SVMxxNOx & VOC sensors

SEK-SVM4x

Evaluation kit SEK-SVM4x for SGP40/SGP41

SEK-SVMxx

NOx & VOC sensors

Download the respective viewer software to start measuring

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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

Smart speakers

Air quality sensors turn smart speakers into intelligent indoor air monitors

Learn more

Thermostats

Why thermostats depend on accurate sensors

Learn more
2.44 x 2.44 x 0.85
mm

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