Environmental Sensor Node SEN6x
Simplifying indoor air quality sensing

Sensing platform for indoor air quality
measurements
Experience the future of air quality sensing with the compact
and powerful SEN6x sensing platform. It combines multiple
sensors in a never-before-seen form factor and can measure
up to nine environmental parameters (PM1, PM2.5, PM4, PM10,RH, T, VOC Index, NO x Index, CO2 or HCHO). The innovative
design simplifies integration, reduces costs, and allows for­customization.
The SEN6x eliminates the complexities of sensor integration and development work, as it incorporates all the necessaryalgorithms. Customers can now focus on their core competencies and create user-friendly applications resulting in fasttime to market and low cost of ownership.

Modularity:
Thanks to its modular approach, SEN6x offers flexibility and customization options. With just one design-in, customers
can serve different product tiers, simplifying the production process and enabling tailored solutions for specific needs.
Whether they require particulate matter measurements or a comprehensive range of air quality parameters, such as temperature, humidity, volatile organic compounds, nitrogen oxides, CO2, or formaldehyde, the SEN6x provides the perfectcombination. Simply select the most suitable variant:• SEN60 – PM
• SEN65 – PM, RH&T, VOC & NOx• SEN66 – PM, RH&T, VOC & NOx , CO2• SEN68 – PM, RH&T, VOC & NOx , HCHOSPS6x – Miniaturized particulate matter sensing building block
Laser beam

At the core of the SEN6x is a brand-new, miniaturized, MEMSbased p­ articulate matter sensing component. It integrates all
the necessary building blocks for measuring PM1, PM2.5, PM4,Particles in
air flowand PM10, revolutionizing particulate matter sensing. The patented geometric arrangement, along with advanced MEMS andpackaging techniques, allows for the integration of the lightDetectors

source, detector, signal processing, and algorithm into one cost-Scattered lightand space-efficient solution.
The measurement of particulate matter relies on light scattering.
When particles in the air pass through the beam of an integrated
laser, the light is scattered, which is then captured by photodetectors. Onboard algorithms analyze the scattered light to determine the size distribution and mass concentration of the particles. With an integrated ASIC, no external processing isneeded, and the SPS6x provides fully processed values through an I²C communication.

Sensor module specifications
Sensor module target specifications 1
Lifetime 2> 10 years operating continuously 24 h/day

Operating conditions 10–10 – 50 °CDigital interface

I2C

Size

55.5 × 25.6 × 21.5 mm³Supply voltage

3.3 V

Particulate matter target specifications 1
Mass concentration range

0–1,000 µg/m³

Mass concentration precision 3, 4 for PM2.5 5± 5 µg/m³ AND 5% m.v. @ 0 – 100 µg/m³± 10% m.v. @ 100 – 1,000 µg/m³

Temperature and humidity target specifications 1
Typical accuracy temperature± 0.45 °C @ 15 – 30 °C, 50 %RH

Typical accuracy relative humidity± 4.5 %RH @ 25 °C, 30 – 70 %RH

Gas target specifications 1VOCNOx

Output signals

1 – 500 VOC Index points

1 – 500 NOx Index points

Device-to-device variation ⁶, ⁷

< ± 15 VOC Index points or % m.v.
(whichever is larger)< ± 50 NOx Index points or % m.v.
(whichever is larger)

CO2 target specifications1CO2 output range 8

0 – 40,000 ppm

CO2 measurement accuracy 9(400 – 1,000 ppm)

± (50 ppm + 2.5 % of reading)Formaldehyde target specifications 1¹²³⁴⁵⁶⁷⁸⁹

HCHO measurement range

0 – 1,000 ppb

HCHO measurement accuracy(0 – 200 ppb HCHO in clean air, 25 °C, 50 % RH)± 20 ppb or ± 20 %, whichever is larger

Subject to change
Lifetime is based on mean-time-to-failure (MTTF) calculation. Lifetime might vary depending on different operating conditions.
Also referred to as “between-parts variation” or “device-to-device variation”.
For further details, please refer to the document “Sensirion Particulate Matter Sensor Specification Statement”.
Verification Aerosol for PM2.5 is a 3 % atomized KCI solution. Deviation to reference instrument is verified in end-tests for every sensor after calibration.
95% of the sensors will be within the typical tolerance corresponding to 2 assuming a normal distribution for ≥ 100 sensors.
Evaluated using the calibration and test sequence according to the application note SGP41 – Testing Guide.
Exposure to CO2 concentrations smaller than 400 ppm can affect the sensor accuracy if the automatic self-calibration (ASC) is on.
Deviation from a high-precision reference with gas mixtures having a tolerance of ± 2 %. Rough handling and shipping can reduce the accuracy of the sensor.
Accuracy is fully restored with FRC or ASC recalibration features after at most 5 days.
10 For variants without formaldehyde, 0 – 50 °C for variants with formaldehydeMost important benefits of SEN6xTechnologyBenefits

All-in-one environmental node: no co-integration of
separate sensor components required

Faster time-time-to-market, less R&D expenses,
bill of m­ aterial and assembly costs

Integrated algorithms: temperature and humidity­compensation, VOC/NO x Index calculation

Reliable and trustworthy measurements

Optimized and tested air flow channel geometry andproven design-in examples

Fast hardware design

Patented sheath-flow technology combined withhigh-quality components

Dust-protection and long life-time

Environmental sensing
Environmental conditions have a major impact on our well-being, comfort, and productivity. Sensirion’s sensor solutions
provide detailed and reliable data on key environmental parameters such as humidity, temperature, volatile organiccompounds (VOCs), particulate matter (PM2.5), formaldehyde, NOx and CO2. Environmental sensing opens up new possibilities to create smarter devices that improve our comfort and well-being as well as increase energy efficiency in awide variety of applications. We accompany you through the entire product development process, from the initial idea
to product launch and beyond. Our expertise ranges from prototype construction, design-in support and use-casedevelopment to inline testing at the mass production stage.

www.sensirion.com/sen6x