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Back to catalog

SEN66

  • All products
  • •Particulate matter sensors
  • •SEN6x

Sensing platform for PM, RH/T, VOC, NOx and CO2 measurements

Experience the future of air quality sensing with the compact and powerful SEN66. It combines multiple sensors in a never-before-seen form factor and can measure up to nine environmental parameters (PM1, PM2.5, PM4, PM10, T, RH, VOC Index, NOx Index, CO2). The innovative design simplifies integration, reduces costs, and allows for customization. At the core of the SEN66 is a brand-new, miniaturized, MEMS-based particulate matter sensing component – the SPS6x.

 

Applications requiring compliance with IAQ standards – such as RESET®, WELL Building Standard™ and California Title 24 Building Energy Efficiency Standards – are well served by the SEN66.

 

Learn more about the SEN6x series here.

See inventoryContact sales

Specification

Particulate matter
Mass concentration precision±10%±10%
Mass concentration range0 - 1000μg/m³0 - 1000μg/m³
Lifetime> 10years> 10years
Particle size rangePM1.0, PM2.5, PM4 and PM10PM1.0, PM2.5, PM4 and PM10
Humidity

Downloads

Drivers for SEN66
  • 02/2025•
  • Link•
Drivers and Sample CodeDownload Drivers for SEN6602/2025Download Drivers for SEN66LinkDownload Drivers for SEN66Download Drivers for SEN66
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
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?
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?
Mechanical Design and Assembly Guidelines
  • 08/2026•
  • PDF•
  • 1013.2 KB
GuideDownload Mechanical Design and Assembly Guidelines08/2026Download Mechanical Design and Assembly GuidelinesPDFDownload Mechanical Design and Assembly Guidelines1013.2 KBDownload Mechanical Design and Assembly Guidelines
Calibration Certificate SEN5x/SEN6x
  • PDF•
  • 199.5 KB
CertificateDownload Calibration Certificate SEN5x/SEN6xDownload Calibration Certificate SEN5x/SEN6xPDFDownload Calibration Certificate SEN5x/SEN6x199.5 KBDownload Calibration Certificate SEN5x/SEN6x
Datasheet SEN6x
  • 12/2025•
  • PDF•
  • 1.4 MB
DatasheetDownload Datasheet SEN6x12/2025Download Datasheet SEN6xPDFDownload Datasheet SEN6x1.4 MBDownload Datasheet SEN6x
Limits of PM2.5 Optical Sensors
  • 01/2026•
  • PDF•
  • 537.8 KB
GuideDownload Limits of PM2.5 Optical Sensors01/2026Download Limits of PM2.5 Optical SensorsPDFDownload Limits of PM2.5 Optical Sensors537.8 KBDownload Limits of PM2.5 Optical Sensors
PS_AN_SEN6x_Testing_And_Evaluation_Guide_D1
  • PDF•
  • 273.5 KB
GuideDownload PS_AN_SEN6x_Testing_And_Evaluation_Guide_D1Download PS_AN_SEN6x_Testing_And_Evaluation_Guide_D1PDFDownload PS_AN_SEN6x_Testing_And_Evaluation_Guide_D1273.5 KBDownload PS_AN_SEN6x_Testing_And_Evaluation_Guide_D1
SEN6x Handling instructions
  • 01/2026•
  • PDF•
  • 241.9 KB
GuideDownload SEN6x Handling instructions01/2026Download SEN6x Handling instructionsPDFDownload SEN6x Handling instructions241.9 KBDownload SEN6x Handling instructions
SEN6x Integrated heater in high- humidity environments
  • 01/2026•
  • PDF•
  • 301.3 KB
GuideDownload SEN6x Integrated heater in high- humidity environments01/2026Download SEN6x Integrated heater in high- humidity environmentsPDFDownload SEN6x Integrated heater in high- humidity environments301.3 KBDownload SEN6x Integrated heater in high- humidity environments
SEN6x Sensor specification statement
  • 01/2026•
  • PDF•
  • 654.7 KB
GuideDownload SEN6x Sensor specification statement01/2026Download SEN6x Sensor specification statementPDFDownload SEN6x Sensor specification statement654.7 KBDownload SEN6x Sensor specification statement
SEN6x Temperature acceleration and compensation instructions
  • 01/2026•
  • PDF•
  • 1.6 MB
GuideDownload SEN6x Temperature acceleration and compensation instructions01/2026Download SEN6x Temperature acceleration and compensation instructionsPDFDownload SEN6x Temperature acceleration and compensation instructions1.6 MBDownload SEN6x Temperature acceleration and compensation instructions
Example retainer sealing foam SEN6x
  • 05/2025•
  • STEP•
  • 52.0 KB
Drawings/CADDownload Example retainer sealing foam SEN6x05/2025Download Example retainer sealing foam SEN6xSTEPDownload Example retainer sealing foam SEN6x52.0 KBDownload Example retainer sealing foam SEN6x
Example retainer SEN6x
  • 05/2025•
  • STEP•
  • 321.4 KB
Drawings/CADDownload Example retainer SEN6x05/2025Download Example retainer SEN6xSTEPDownload Example retainer SEN6x321.4 KBDownload Example retainer SEN6x
STEP file SEN6x
  • 09/2025•
  • STEP•
  • 4.2 MB
Drawings/CADDownload STEP file SEN6x09/2025Download STEP file SEN6xSTEPDownload STEP file SEN6x4.2 MBDownload STEP file SEN6x
REACH and RoHS declaration Partciulate Matter
  • 04/2026•
  • PDF•
  • 145.6 KB
CertificateDownload REACH and RoHS declaration Partciulate Matter04/2026Download REACH and RoHS declaration Partciulate MatterPDFDownload REACH and RoHS declaration Partciulate Matter145.6 KBDownload REACH and RoHS declaration Partciulate Matter
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
Particulate Matter and Environmental Node Flyer
  • 10/2025•
  • PDF•
  • 14.8 MB
FlyerDownload Particulate Matter and Environmental Node Flyer10/2025Download Particulate Matter and Environmental Node FlyerPDFDownload Particulate Matter and Environmental Node Flyer14.8 MBDownload Particulate Matter and Environmental Node Flyer
Particulate Matter and Environmental Node Flyer Chinese
  • 01/2026•
  • PDF•
  • 891.5 KB
FlyerDownload Particulate Matter and Environmental Node Flyer Chinese01/2026Download Particulate Matter and Environmental Node Flyer ChinesePDFDownload Particulate Matter and Environmental Node Flyer Chinese891.5 KBDownload Particulate Matter and Environmental Node Flyer Chinese
Particulate Matter and Environmental Node Flyer Japanese
  • 04/2026•
  • PDF•
  • 4.4 MB
FlyerDownload Particulate Matter and Environmental Node Flyer Japanese04/2026Download Particulate Matter and Environmental Node Flyer JapanesePDFDownload Particulate Matter and Environmental Node Flyer Japanese4.4 MBDownload Particulate Matter and Environmental Node Flyer Japanese
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  • SEN66
Typ. relative humidity accuracy
4.5
%RH
4.5
%RH
CO₂
CO₂ Output Range0 - 40000ppm0 - 40000ppm
Accuracy
±50.0
±50.0
VOC
Sensor output0-500 VOC Index0-500 VOC Index
Generic
Supply voltage3.15 - 3.6V3.15 - 3.6V
Average supply current90000uA90000uA
InterfacesI²CI²C
Size (LxWxH)55.2 x 25.6 x 21.3mm55.2 x 25.6 x 21.3mm
Temperature
Typ. temperature accuracy0.45°C0.45°C

Sensor evaluation

Buy the following products to evaluate this sensor

NameDescriptionSeriesCategory
SEK-SEN66Evaluation kit SEN62, SEN65, SEN66SEK-SEN6xParticulate matter sensors
SEK-SensorBridgeConnecting bridge with two sensor portsSEK-SensorBridge

SEK-SEN66

Evaluation kit SEN62, SEN65, SEN66

SEK-SEN6x

Particulate matter sensors

SEK-SensorBridge

Connecting bridge with two sensor ports

SEK-SensorBridge

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

IAQ Monitors

Make indoor environments safer, healthier, and more comfortable with advanced sensor monitoring

Learn more

CO₂ monitoring for better sleep quality

Understanding how ventilation impacts sleep, health, and recovery

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

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