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  • All products
  • Particulate matter
  • SEN6x

SEN66

New

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 range
0 - 1000
0 - 1000μg/m³
Humidity
Typ. relative humidity accuracy
4.5
4.5%RH
CO₂
Specified CO₂ Measurement Range
0 - 40000
0 - 40000ppm
Accuracy
±50.0
±50.0
VOC
Sensor output
0-500 VOC Index
0-500 VOC Index
Generic
Interfaces
I²C
I²C
Size (LxWxH)
55.2 x 25.6 x 21.3
55.2 x 25.6 x 21.3mm
Temperature
Typ. temperature accuracy
0.45
0.45°C

Downloads

Drivers for SEN66

02/2025

Link

Drivers and Sample Code02/2025Link
Compliance of Sensirion’s VOC Sensors with RESET and WELL

04/2023

File

748.3 KB

Application note04/2023PDF748.3 KB
How can I integrate Sensirion’s VOC and NOx sensors into my air purifier?

04/2022

File

249.8 KB

Application note04/2022PDF249.8 KB
Is it possible to map the output of a MOX sensor to a norm?

04/2022

File

258.0 KB

Application note04/2022PDF258.0 KB
What are oxidizing gases?

04/2022

File

214.8 KB

Application note04/2022PDF214.8 KB
What are reducing gases?

04/2022

File

332.0 KB

Application note04/2022PDF332.0 KB
What is a metal oxide (MOX) sensor?

04/2022

File

288.2 KB

Application note04/2022PDF288.2 KB
What is Sensirion’s NOx Index?

04/2022

File

341.2 KB

Application note04/2022PDF341.2 KB
What is Sensirion’s VOC Index?

04/2022

File

300.4 KB

Application note04/2022PDF300.4 KB
Datasheet SEN6x

09/2025

File

1.5 MB

Datasheet09/2025PDF1.5 MB
SEN6x – Mechanical design and assembly guidelines

05/2025

File

606.2 KB

Application note05/2025PDF606.2 KB
Example retainer sealing foam SEN6x

05/2025

File

52.0 KB

Drawings/CAD05/2025STEP52.0 KB
Example retainer SEN6x

05/2025

File

321.4 KB

Drawings/CAD05/2025STEP321.4 KB
STEP file SEN6x

09/2025

File

4.2 MB

Drawings/CAD09/2025STEP4.2 MB
REACH and RoHS declaration SPS30, SEN4x, SEN5x, SEN6x

01/2025

File

150.2 KB

Certificate01/2025PDF150.2 KB
Indoor air quality brochure

11/2024

Link

7.7 MB

Flyer11/2024Link7.7 MB
Particulate Matter and Environmental Node Flyer

10/2025

File

14.8 MB

Flyer10/2025PDF14.8 MB
Particulate Matter and Environmental Node Flyer Chinese

03/2025

File

2.0 MB

Flyer03/2025PDF2.0 MB
Particulate Matter and Environmental Node Flyer Japanese

05/2025

File

4.4 MB

Flyer05/2025PDF4.4 MB

Sensor evaluation

Buy the following products to evaluate this sensor

NameDescriptionSeriesCategory
SEK-SEN66Evaluation kit SEN60, SEN65, SEN66SEK-SEN6x
SEK-SensorBridgeConnecting bridge with two sensor portsSEK-SensorBridge

SEK-SEN66

Evaluation kit SEN60, SEN65, SEN66

SEK-SEN6x

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

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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