$10: https://www.ikea.com/us/en/p/vindriktning-air-quality-sensor...
presumably not quite feature-comparable, but the article and website are rather absent in report what exactly the "flatburn" is detecting - sounds like "fine particulate" (PM2.5? PM10?) and NO2
they are that different
Or if you're building yourself, $35: https://sensirion.com/products/catalog/SEN55
Both include NO sensors.
Have you experience playing with it?
In particular, I wonder how usable it is with e.g. a Linux laptop.
It looks like the device uses a I2C interface.
$10: https://www.ikea.com/us/en/p/vindriktning-air-quality-sensor...
presumably not quite feature-comparable, but the article and website are rather absent in report what exactly the "flatburn" is detecting - sounds like "fine particulate" (PM2.5? PM10?) and NO2