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.
| Particulate matter | |||
|---|---|---|---|
| Mass concentration precision ±10 | ±10 | % | |
| Mass concentration range 0 - 1000 | 0 - 1000 | μg/m³ | |
| Lifetime > 10 | > 10 | years | |
| Particle size range PM1.0, PM2.5, PM4 and PM10 | PM1.0, PM2.5, PM4 and PM10 |
| Humidity | |
|---|---|
| Typ. relative humidity accuracy 4.5 |
| %RH |
| CO₂ | |||
|---|---|---|---|
| CO₂ Output Range 0 - 40000 | 0 - 40000 | ppm | |
| Accuracy ±50.0 | ±50.0 |
| VOC | |||
|---|---|---|---|
| Sensor output 0-500 VOC Index | 0-500 VOC Index |
| Generic | |||
|---|---|---|---|
| Supply voltage 3.15 - 3.45 | 3.15 - 3.45 | V | |
| Average supply current 90000 | 90000 | uA | |
| Interfaces I²C | I²C | ||
| Size (LxWxH) 55.2 x 25.6 x 21.3 | 55.2 x 25.6 x 21.3 | mm |
| Temperature | |||
|---|---|---|---|
| Typ. temperature accuracy 0.45 | 0.45 | °C |
Buy the following products to evaluate this sensor

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.
| Part number | Quantity | Distributor name | Country | Uploaded | |
|---|---|---|---|---|---|
| SEN66-SIN-T | 372 | Arrow Electronics | US | 04.12.2025 | Buy |
| SEN66-SIN-T | 61 | Glyn GmbH & Co. Kg | DE | 02.12.2025 | Buy |