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Particulate Sensor - SEN66 / SEN6x family

Sensors
#1

Saw the youtube stream on Hackster.io and mentioned this sensor, but thought I should probably stick it in the forum too now that I’ve joined.

Sensirion have released a new series, pin compatible with the SEN5x series, but using a separate driver. https://sensirion.com/products/catalog/SEN66
It’s more of a pre-production run stage, but evaluation kits are available as of last November (with the SEN66), and the SEN66 standalone devices are expected any moment / Q2 2025.
The SEN66 includes CO2, whereas the previous family (SEN54/SEN55) had only VOC Index / NOx Index for gas sensing.
The SEN68 expected later in the year includes HCNO instead of CO2.

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#2

Wow! Thanks @tyethgundry !

We’ll take a look and see if we can integrate/test one!. In the new docs we have this guide on how to implement new sensors in case anyone wants to give it a go!

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#3

Just got my shipping notification for the bare sensors (almost half the price of eval kit) from digikey and were 160 left so it seems they’ve reached mass production / global distribution!

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#4

Hi @tyethgundry

One detail, sorry. The instructions above are for the implementation of new sensors on the auxiliary connector. This bus works at 3.3V.

To implement the PM sensor we use the sensor board connector, with the pinout described here. For the firmware implementation, the code lives in the urban board. There, the implementation would be fairly similar to the SEN5X one, which can be found by all the #define WITH_SEN5X.